Table of Contents
- 15E900 SAS Product Manual
- Seagate® Technology Support Services
- 1.0 Scope
- 2.0 Applicable standards and reference documentation
- 3.0 General description
- 4.0 Performance characteristics
- 5.0 Reliability specifications
- 6.0 Physical/electrical specifications
- 7.0 About FIPS
- 8.0 About self-encrypting drives
- 9.0 Defect and error management
- 10.0 Installation
- 11.0 Interface requirements
Seagate ST900MP0166 User Manual
Displayed below is the user manual for ST900MP0166 by Seagate which is a product in the Internal Hard Drives category. This manual has pages.
Related Manuals
* Default configuration is 512E for 512E / 4KN drives.
See Section 4.2.2 to Fast Format to 4KN in seconds
100827313 - Rev. B
October 2017
512N sectors
Standard models
ST900MP0006
ST600MP0006
ST300MP0006
Self-Encryption models
ST900MP0016
ST600MP0016
ST300MP0016
Instant Secure Erase models
ST900MP0026
ST600MP0036
ST300MP0026
SED FIPS (140-2) models
ST900MP0126
ST600MP0026
512E* / 4KN sectors
Standard models
ST900MP0146
ST600MP0136
ST300MP0106
Self-Encryption models
ST900MP0156
ST600MP0146
ST300MP0116
Instant Secure Erase models
ST900MP0136
ST600MP0126
ST300MP0096
SED FIPS (140-2) models
ST900MP0166
ST600MP0156
15E900 SAS Product Manual
© 2017 Seagate Technology LLC. All rights reserved.
Publication number: 100827313, Rev. B October 2017
Seagate, Seagate Technology and the Spiral logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Power Choice, Raid Rebuild and
SeaTools are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/or other countries. The FIPS logo is a certi-
fication mark of NIST, which does not imply product endorsement by NIST, the U.S., or Canadian governments. All other trademarks or registered trademarks are the property of their
respective owners.
No part of this publication may be reproduced in any form without written permission of Seagate Technology LLC.
Call 877-PUB-TEK1 (877-782-8351) to request permission.
When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes. Your computer’s operating system may use a different
standard of measurement and report a lower capacity. In addition, some of the listed capacity is used for formatting and other functions, and thus will not be available for data storage.
Actual quantities will vary based on various factors, including file size, file format, features and application software. Actual data rates may vary depending on operating environment
and other factors. The export or re-export of hardware or software containing encryption may be regulated by the U.S. Department of Commerce, Bureau of Industry and Security (for
more information, visit www.bis.doc.gov), and controlled for import and use outside of the U.S. Seagate reserves the right to change, without notice, product offerings or specifications.
Document Revision History
Revision Date Pages affected and Description of changes
Rev. A 10/05/2017 Initial release.
Rev. B 10/27/2017 Updated (Note:) formatting throughout manual.
36: Remover Figure 10.
Seagate Exos 15E900 SAS Product Manual, Rev. B 2
Contents
Seagate® Technology Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Agency and Safety Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.1.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.2 Regulatory Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.3 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4 Electromagnetic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4.1 European Union (EU) CE Marking Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.2 Australian RCM Compliance Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.3 Canada ICES-003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.4 South Korean KC Certification Mark. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.5 Morocco Commodity Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.6 Taiwanese BSMI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4.7 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5 Environmental protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5.1 European Union Restriction of Hazardous Substance Law . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5.2 China Requirements —China RoHS 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.5.3 Taiwan Requirements — Taiwan RoHS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.6 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.0 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.2 Media description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.5 Formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.6 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.7 Factory installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Internal drive characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2 Seek performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2.1 Format command execution time for 512-byte sectors (minutes) . . . . . . . . . . . . . . . . . . . .17
4.2.2 Fast Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.2.3 General performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.5 Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.5.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.5.3 Hybrid caching operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Seagate Exos 15E900 SAS Product Manual, Rev. B 3
Contents
5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Error rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.1.1 Recoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.1.2 Unrecoverable Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.1.3 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.1.4 Interface errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.2 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF). . . . . . . . . . . . . . .21
5.2.2 Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.2.3 Hot plugging the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.2.4 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.2.5 Thermal monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.2.6 Drive Self Test (DST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.2.7 Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1 PowerChoiceTM power management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6.1.1 PowerChoice reporting methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.2 Power Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.3 AC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.4 DC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.4.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.4.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.4.3 Current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.5 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.6 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
6.6.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
6.6.2 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
6.6.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
6.6.4 Shock and vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
6.6.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.6.6 Corrosive environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.6.7 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.6.8 Electromagnetic susceptibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.7 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Seagate Exos 15E900 SAS Product Manual, Rev. B 4
Contents
7.0 About FIPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.0 About self-encrypting drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1 Data encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.2 Controlled access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.2.1 Admin SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.2.2 Locking SP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.2.3 Default password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.3 Random number generator (RNG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.4 Drive locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.5 Data bands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.6 Cryptographic erase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.7 Authenticated firmware download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.8 Power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.9 Supported commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.10 RevertSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
9.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.3 SAS system errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
9.4 Deferred Auto-Reallocation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
9.5 Protection Information (PI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
9.5.1 Levels of PI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
9.5.2 Setting and determining the current Type Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
9.5.3 Identifying a Protection Information drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
9.6 Seagate RAID Rebuild ™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
10.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10.1 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.2 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.4 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Seagate Exos 15E900 SAS Product Manual, Rev. B 5
Contents
11.0 Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
11.1 SAS features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
11.1.1 Task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
11.1.2 Task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
11.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
11.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
11.3.1 Inquiry data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
11.3.2 Mode Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
11.4 Miscellaneous operating features and conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
11.4.1 SAS physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
11.4.2 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.4.3 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.4.4 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.4.5 Pin descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
11.4.6 SAS transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
11.4.7 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
11.5 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
11.5.1 Ready LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
11.5.2 Differential signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
11.6 SAS-3 Specification compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
11.7 Additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Seagate Exos 15E900 SAS Product Manual, Rev. B 6
Figures
Figure 1. Current profile for 300GB models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 2. Current profile for 600GB models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 3. Current profile for 900GB models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 4. 300GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 33
Figure 5. 300GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 33
Figure 6. 600GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 34
Figure 7. 600GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 34
Figure 8. 900GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 35
Figure 9. 900GB models (12Gb) DC current and power vs. input/output operations per second . . . . . . . . . . . . . 35
Figure 10. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 11. Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 12. Example of FIPS tamper evidence labels/seals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 13. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 14. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 15. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 16. SAS device plug dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 17. SAS device plug dimensions (detail) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 18. SAS transmitters and receivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Seagate Exos 15E900 SAS Product Manual, Rev. B 7
For information regarding online support and services, visit: http://www.seagate.com/contacts/
For information regarding Warranty Support, visit: http://www.seagate.com/support/warranty-and-replacements/
For information regarding data recovery services, visit: http://www.seagate.com/services-software/recover/
For Seagate OEM, Distribution partner and reseller portals, visit: http://www.seagate.com/partners/
Seagate® Technology Support Services
Seagate Exos 15E900 SAS Product Manual, Rev. B 8
1.0 Scope
This manual describes the Seagate® Exos™ 15E900 SAS SAS (Serial Attached SCSI) disk drives.
These drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part number
100293071) describes the general SAS characteristics of this and other Seagate SAS drives. The Self-Encrypting Drive Reference
Manual, part number 100515636, describes the interface, general operation, and security features available on Self-Encrypting Drive
models.
Product data communicated in this manual is specific only to the model numbers listed in this manual. The data listed in this manual
may not be predictive of future generation specifications or requirements. If designing a system which will use one of the models
listed or future generation products and need further assistance, please contact the Field Applications Engineer (FAE) or our global
support services group as shown in “Seagate® Technology Support Services” on page 7.
Unless otherwise stated, the information in this manual applies to standard and Self-Encrypting Drive models.
For more information on FIPS 140-2 Level 2 certification see Section 7.0 on page 40.
Standard Models Self-Encrypting Drive (SED) Models Instant Secure Erase (ISE) Models FIPS 140-2 Level 2 Models
512 Native
ST900MP0006 ST900MP0016 ST900MP0026 ST900MP0126
ST600MP0006 ST600MP0016 ST600MP0036 ST600MP0026
ST300MP0006 ST300MP0016 ST300MP0026
4096 / 512 Emulation
ST900MP0146 ST900MP0156 ST900MP0136 ST900MP0166
ST600MP0136 ST600MP0146 ST600MP0126 ST600MP0156
ST300MP0106 ST300MP0116 ST300MP0096
Note Previous generations of Seagate Self-Encrypting Drive models were called Full Disk Encryption (FDE) models
before a differentiation between drive-based encryption and other forms of encryption was necessary.
Note The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of Data
at Rest” based on the standards defined by the Trusted Computing Group (see www.trustedcomputinggroup.org).
Seagate Exos 15E900 SAS Product Manual, Rev. B 9
2.0 Applicable standards and reference documentation
The drives documented in this manual have been developed as system peripherals to the highest standards of design and
construction. The drives depends on host equipment to provide adequate power and environment for optimum performance and
compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power
distribution, shielding, audible noise control, and temperature regulation. In particular, the drive must be securely mounted to
guarantee the specified performance characteristics. Mounting by bottom holes must meet the requirements of Section
10.3.Agency and Safety Certifications
2.1 Agency and Safety Certifications
Each Hard Drive and Solid State Drive ("drives") has a product label that includes certifications that are applicable to that specific
drive. The following information provides an overview of requirements that may be applicable to the drive.
2.1.1 Safety certification
These products are certified to meet the requirements of UL/cUL 60950-1, EN 60950-1, and may also include, IEC 62368, UL 62368
and EN 62368.
The security features of Self-Encrypting Drive models are based on the “TCG Storage Architecture Core Specification” and the “TCG
Storage Workgroup Security Subsystem Class: Enterprise_A” specification with additional vendor-unique features as noted in this
product manual.
2.2 Regulatory Models
The following regulatory model number represent all features and configurations within the series:
Regulatory Model Numbers: STT001
2.3 Electromagnetic susceptibility
The drive as delivered is tested to meet susceptibility requirements in a representative enclosure. It is the responsibility of those
integrating the drive within their systems to perform those tests required and design their system to ensure that equipment
operating in the same system as the drive or external to the system does not adversely affect the performance of the drive. See
Section 6.3, DC power requirements.
2.4 Electromagnetic compliance
Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and RCM Marking. The
drive was tested in a representative system for typical applications and comply with the Electromagnetic Interference/
Electromagnetic Susceptibility (EMI/EMS) for Class B products. The selected system represents the most popular characteristics for
test platforms. The system configurations include:
• Typical current use microprocessor
•Keyboard
• Monitor/display
•Mouse
Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee that all systems will
comply. The computer manufacturer or system integrator shall confirm EMC compliance and provide the appropriate marking for
their product.
Seagate Exos 15E900 SAS Product Manual, Rev. B 10
2.4.1 European Union (EU) CE Marking Requirements
Drives that display the CE mark comply with the European Union (EU) requirements specified in the Electromagnetic Compatibility
Directive (2014/30/EU) put into force on 20 April 2016. Testing is performed to the levels specified by the product standards for
Information Technology Equipment (ITE). Emission levels are defined by EN 55032:2012, Class B and the immunity levels are defined
by EN 55024:2010.
The drives also meet the requirements of The Low Voltage Directive (LVD) 2014/35/EU.
Seagate drives are tested in representative end-user systems. Although CE-marked Seagate drives comply with all relevant
regulatory requirements and standards for the drives, Seagate cannot guarantee that all system-level products into which the drives
are installed comply with all regulatory requirements and standards applicable to the system-level products. The drive is designed
for operation inside a properly designed system (e.g., enclosure designed for the drive), with properly shielded I/O cable (if
necessary) and terminators on all unused I/O ports. Computer manufacturers and system integrators should confirm EMC
compliance and provide CE marking for the system-level products.
For compliance with the RoHS "Recast" Directive 2011/65/EU (RoHS 2), see Section 2.5.1 on page 11.
2.4.2 Australian RCM Compliance Mark
If these models have the RCM marking, they comply with the Australia/New Zealand Standard AS/NZ CISPR32 and meet the
Electromagnetic Compatibility (EMC) Framework requirements of the Australian Communication and Media Authority (ACMA).
2.4.3 Canada ICES-003
If this model has the ICES-003:2016 marking it complies with requirements of ICES tested per ANSI C63.4-2014.
2.4.4 South Korean KC Certification Mark
The South Korean KC Certification Mark means the drives comply with paragraph 1 of Article 11 of the Electromagnetic Compatibility
control Regulation and meet the Electromagnetic Compatibility (EMC) Framework requirements of the Radio Research Agency (RRA)
Communications Commission, Republic of Korea.These drives have been tested and comply with the Electromagnetic Interference/
Electromagnetic Susceptibility (EMI/EMS) for Class B products. Drives are tested in a representative, end-user system by a Korean-
recognized lab.
2.4.5 Morocco Commodity Mark
To satisfy our OEM customers, Seagate has added the Moroccan Commodity Mark to the drives provided to the OEM for the sale of
Customer Kits produced by our OEM customers that are intended to be incorporated into the OEM's finished system-level product by
an end user. The Customer Kits are considered 'devices' under Morocco's Order of the Minister of Industry, Trade, Investment and
Digital Economy No. 2574-14 of 29 Ramadan 1436 (16 July 2015) on electromagnetic compatibility of equipment.
Seagate drives are tested for compliance and complies with the European Union (EU) Electromagnetic Compatibility (EMC) Directive
2014/30/EU and the Low Voltage Directive (LVD) 2014/35/EU. Accordingly, the drives also meets the requirements of Morocco's
Order of the Minister of Industry, Trade, Investment and Digital Economy No. 2574-14 of 29 Ramadan 1436 (16 July 2015) on
electromagnetic compatibility of equipment.
2.4.6 Taiwanese BSMI
Drives with the Taiwanese certification mark comply with Chinese National Standard, CNS13438.
For compliance with the Taiwan Bureau of Standards, Metrology and Inspection’s (BSMI) requirements, see Section 2.5.3 on page 12.
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Seagate Exos 15E900 SAS Product Manual, Rev. B 11
2.4.7 FCC verification
These drives are intended to be contained solely within a personal computer or similar enclosure (not attached as an external
device). As such, each drive is considered to be a subassembly even when it is individually marketed to the customer. As a
subassembly, no Federal Communications Commission verification or certification of the device is required.
Seagate has tested this device in enclosures as described above to ensure that the total assembly (enclosure, disk drive,
motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant to Subpart J, Part 15 of the
FCC rules. Operation with noncertified assemblies is likely to result in interference to radio and television reception.
Radio and television interference. This equipment generates and uses radio frequency energy and if not installed and used in
strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception.
This equipment is designed to provide reasonable protection against such interference in a residential installation. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or
television, which can be determined by turning the equipment on and off, users are encouraged to try one or more of the following
corrective measures:
• Reorient the receiving antenna.
• Move the device to one side or the other of the radio or TV.
• Move the device farther away from the radio or TV.
• Plug the computer into a different outlet so that the receiver and computer are on different branch outlets.
If necessary, users should consult a dealer or an experienced radio/television technician for additional suggestions. Users may find
helpful the following booklet prepared by the Federal Communications Commission: How to Identify and Resolve Radio-Television
Interference Problems. This booklet is available from the Superintendent of Documents, U.S. Government Printing Office, Washington,
DC 20402. Refer to publication number 004-000-00345-4.
2.5 Environmental protection
Seagate designs its products to meet environmental protection requirements worldwide, including regulations restricting certain
chemical substances.
2.5.1 European Union Restriction of Hazardous Substance Law
2.5.1.1 Restriction of Hazardous Substances in Electrical and Electronic Equipment
Seagate drives are designed to be compliant with the European Union RoHS "Recast" Directive 2011/65/EU (RoHS 2) as amended by
Directive (EU) 2015/863. The RoHS2 restricts the use of certain hazardous substances such as Lead, Cadmium, Mercury, Hexavalent
Chromium, Polybrominated Biphenyls (PBB) and Polybrominated Diphenyl Ether (PBDE), BisBis(2-Ethylhexyl) phthalate (DEHP),
Benzyl butyl phthalate (BBP), Dibutyl phthalate (DBP), and Diisobutyl phthalate (DIBP) in electrical and electronic equipment (EEE).
2.5.1.2 Substances of Very High Concern (SVHC)
The European Union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) Regulation (EC) 1907/2006
regulates chemicals shipped into and used in Europe. A number of parts and materials in Seagate products are procured from
external suppliers. We rely on the representations of our suppliers regarding the presence of REACH substances in these articles and
materials. Our supplier contracts require compliance with our chemical substance restrictions, and our suppliers document their
compliance with our requirements by providing full-disclosure material content declarations that disclose inclusion of any REACH-
regulated substance in such articles or materials. Product-specific REACH declarations are available upon request through your
Seagate Sales Representative.
Seagate Exos 15E900 SAS Product Manual, Rev. B 12
2.5.2 China Requirements —China RoHS 2
China RoHS 2 refers to the Ministry of Industry and Information Technology Order No. 32, effective July 1, 2016, titled
Management Methods for the Restriction of the Use of Hazardous Substances in Electrical and Electronic Products. To
comply with China RoHS 2, Seagate determines this product's Environmental Protection Use Period (EPUP) to be 20
years in accordance with the Marking for the Restricted Use of Hazardous Substances in Electronic and Electrical Products,
SJT 11364-2014.
2.5.3 Taiwan Requirements — Taiwan RoHS
Taiwan RoHS refers to the Taiwan Bureau of Standards, Metrology and Inspection’s (BSMI) requirements in standard CNS 15663,
Guidance to reduction of the restricted chemical substances in electrical and electronic equipment. Seagate products must comply
with the “Marking of presence” requirements in Section 5 of CNS 15663, effective January 1, 2018. This product is Taiwan RoHS
compliant.
The following table meets the Section 5 “Marking of presence” requirements.
Table 1 China - Hazardous Substances
部件名称
Part Name
有害物质
Hazardous Substances
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(Cr+6)
多溴联苯
(PBB)
多溴二苯醚
(PBDE)
硬盘驱动器
HDD XOO O O O
印刷电路板组装
PCBA XOO O O O
本表格依据 SJ/T 11364 的规定编制。
This table is prepared in accordance with the provisions of SJ/T 11364-2014
O：表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。
O：Indicates that the hazardous substance contained in all of the homogeneous materials for this
part is below the limit requirement of GB/T26572.
X：表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。
X：Indicates that the hazardous substance contained in at least one of the homogeneous materials
used for this part is above the limit requirement of GB/T26572.
Table 2 Taiwan - Restricted Substances
設備名稱：硬盤設備，型號：僅適用于內部使用
Equipment Name: Hard Disk Device, Type Designation: Internal Use Only
單元
Unit
限用物質及其化學符號
Restricted Substance and its chemical symbol
鉛
(Pb)
汞
(Hg)
鎘
(Cd)
六價鉻
(Cr+6)
多溴聯苯
(PBB)
多溴二苯醚
(PBDE)
硬盤驅動器
HDD —OOOOO
印刷電路板组装
PCBA —OOOOO
備考 1. "O" 係指該项限用物質之百分比含量未超出百分比含量基準值。
Note 1. "O" indicates that the percentage content of the restricted substance
does not exceed the percentage of reference value of presence.
備考 2. "—" 係指該项限用物質為排除項目。
Note 2. "—" indicates that the restricted substance corresponds to the exemption.
20
Seagate Exos 15E900 SAS Product Manual, Rev. B 13
2.6 Reference documents
SAS Interface Manual
Seagate part number: 100293071
SCSI Commands Reference Manual
Seagate part number: 100293068
Self-Encrypting Drives Reference Manual
Seagate part number: 100515636
ANSI SAS Documents
SFF-8223 2.5” Drive Form Factor with Serial Connector
SFF-8460 HSS Backplane Design Guidelines
SFF-8470 Multi Lane Copper Connector
SFF-8482 SAS Plug Connector
INCITS 481-2011 Fibre Channel Protocol for SCSI -4 (FCP-4)
INCITS 502 SCSI Primary Commands-5 (SPC-5) Rev. 10
INCITS 506 SCSI Block Commands-4 (SBC-4) Rev. 10
INCITS 519 Serial Attached SCSI (SAS-3) Rev. 06
INCITS 538 SCSI Protocol Layer-4 (SPL-4) Rev. 08
INCITS 536 Zone Block Commands (ZBC)
ANSI Small Computer System Interface (SCSI) Documents
INCITS 515 SCSI Architecture Model (SAM-5) Rev. 11
Trusted Computing Group (TCG) Documents (apply to Self-Encrypting Drive models only)
TCG Storage Architecture Core Specification, Rev. 1.0
TCG Storage Security Subsystem Class Enterprise Specification, Rev. 1.0
Specification for Acoustic Test Requirement and Procedures
Seagate part number: 30553-001
In case of conflict between this document and any referenced document, this document takes precedence.
Seagate Exos 15E900 SAS Product Manual, Rev. B 14
3.0 General description
These drives provide high performance, high capacity data storage for a variety of systems including engineering workstations,
network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation
computing demands for performance, scalability, flexibility and high-density storage requirements.
The hybrid functionality of the 15K drive provides improved performance over standard HDDs in real-world workloads. This
improvement is due to the addition of a solid state component that caches “hot” data for reads as well as protects write data via non-
volatile cache (NVC).
These drives are random access storage devices designed to support the Serial Attached SCSI Protocol as described in the ANSI
specifications, this document, and the SAS Interface Manual (part number 100293071) which describes the general interface
characteristics of this drive. These drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with
the ANSI SCSI-1 standard. The SAS connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future
users the choice of populating their systems with either SAS or SATA hard disk drives. This allows integrators to continue to leverage
existing investment in SCSI while gaining a 12.0Gb/s serial data transfer rate.
The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of Data at Rest” based
on the standards defined by the Trusted Computing Group (see www.trustedcomputinggroup.org).
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to
maintain a contamination-free HDA environment.
The heads automatically go to the ramp load/unload when power is removed from the drive and during the deeper sleep modes.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and
handling. The shipping lock disengages and the head load process begins when power is applied to the drive.
These drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer
adjustments and related reliability concerns.
The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that provides
excellent performance with minimal power dissipation.
Note Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this
requires special facilities. The drive does not contain user-replaceable parts. Opening the HDA for any reason voids the warranty.
Seagate Exos 15E900 SAS Product Manual, Rev. B 15
3.1 Standard features
Exos 15E900 SAS drives have the following standard features:
• 256MB data buffer (see Section 4.5)
• 128-deep task set (queue)
• 3.0 / 6.0 / 12.0 Gb Serial Attached SCSI (SAS) interface
• Automatic shipping lock
•Drive Self Test (DST)
• Dynamic spindle brake
• ECC maximum burst correction length of 520 bits for 512 byte blocks and 3360 bits for 4k byte blocks
• Embedded servo design
• Enhanced Caching - 8MB NVC-backed write cache on 512E/4KN and 3.2MB on 512N
• Firmware downloadable using the SAS interface
• Flawed logical block reallocation at format time
• Idle Read After Write (IRAW)
• Industry standard SFF 2.5-in dimensions
• Integrated dual port SAS controller supporting the SCSI protocol
• Jumperless configuration
• No preventive maintenance or adjustments required
• Perpendicular recording technology
• Power Balance supported (see Section 6.2 on page 26)
•Power Save
• Programmable auto write and read reallocation
• Programmable logical block reallocation scheme
• Reallocation of defects on command (Post Format)
•SAS Power Disable
• Self diagnostics performed when power is applied to the drive
• Support for SAS expanders and fanout adapters
• Supports up to 32 initiators
• T10 Fast Format supported (see <hypertext_blue>Section 4.2.2)
•TurboBoost
TM 16GB read cache 512E / 4KN
• User-selectable logical block size for 4KN (4096, 4160 or 4224 bytes per logical block)
• User-selectable logical block size for 512N/512E (512, 520, or 528 bytes per logical block)
• Vertical, horizontal, or top down mounting
• Zone bit recording (ZBR)
Self-Encrypting Drive models have the following additional features:
• 16 independent data bands
• Authenticated firmware download
• Automatic data encryption/decryption
• Controlled access
• Cryptographic erase of user data for a drive that will be repurposed or scrapped
•Drive locking
•Random number generator
3.2 Media description
The media used on the drive has a glass substrate coated with a thin film magnetic material, overcoated with a proprietary
protective layer for improved durability and environmental protection.
Seagate Exos 15E900 SAS Product Manual, Rev. B 16
3.3 Performance
• 15K RPM spindle. Average latency = 2.0 ms
• 600 MB/s maximum instantaneous data transfers
• Adaptive seek velocity; improved seek performance
• Background processing of queue
• Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system performance
• Supports start and stop commands (spindle stops spinning)
3.4 Reliability
• 5-year warranty
• Annualized Failure Rate (AFR) of 0.44%
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• Mean Time Between Failures (MTBF) of 2,000,000 hours
3.5 Formatted capacities
Standard OEM models are formatted to 512 bytes per block. The block size is selectable at format time and must be a multiple of 4
bytes. Users having the necessary equipment may modify the data block size before issuing a format command and obtain different
formatted capacities than those listed.
To provide a stable target capacity environment and at the same time provide users with flexibility if they choose, Seagate
recommends product planning in one of two modes:
Seagate designs capacity points at certain block sizes that Seagate guarantees current and future products will meet. We
recommend customers use this capacity in their project planning, as it ensures a stable operating point with backward and forward
compatibility from generation to generation. The current guaranteed operating points for this product are:
3.6 Programmable drive capacity
Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select (6)
parameter list table in the SAS Interface Manual, part number 100293071. A value of zero in the Number of Blocks field indicates that
the drive will not change the capacity it is currently formatted to have. A number other than zero and less than the maximum
number of LBAs in the Number of Blocks field changes the total drive capacity to the value in the Number of Blocks field. A value
greater than the maximum number of LBAs is rounded down to the maximum capacity.
3.7 Factory installed options
Integrators may order the following items which are incorporated at the manufacturing facility during production or packaged
before shipping. Some of the options available are (not an exhaustive list of possible options):
• Other capacities can be ordered depending on sparing scheme and sector size requested.
• Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units
shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should
specify this option.
• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each standard OEM drive shipped, but extra
copies may be ordered.
Note There is no significant performance difference between Self-Encrypting
Drive and standard (non-Self-Encrypting Drive) models.
Capacity (Blocks)
Sector Size
900GB Models 600GB Models 300GB Models
Decimal Hex Decimal Hex Decimal Hex
512 1,758,174,768 68CB9E30h 1,172,123,568 45DD2FB0h 585,937,500 22ECB25Ch
520 1,720,961,544 6693CA08h 1,147,307,696 446286B0h 573,653,848 22314358h
528 1,673,624,336 63C17B10h 1,115,749,560 4280FCB8h 557,874,778 21407E5Ah
4096 219,771,846 D1973C6h 146,515,446 8BBA5F6h 73,259,046 45DD826h
4160 215,480,776 CD7F9C8h 143,653,848 88FFBD8h 71,826,928 447FDF0h
4224 211,150,576 C95E6F0h 140,767,048 863EF48h 70,383,528 431F7A8h
Seagate Exos 15E900 SAS Product Manual, Rev. B 17
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Exos 15E900 SAS drives.
4.1 Internal drive characteristics
900GB Models 600GB Models 300GB Models
Drive capacity 900 600 300 GB (formatted, rounded off value)
Read/write data heads 6 4 2
Bytes per track 1055/1081 1055/1081 1055/1081 KBytes (avg, rounded off values)(4KN or 512E / 512N)
Bytes per surface 150,000 150,000 150,000 MBytes (unformatted, rounded off values
Tracks per surface (total) 138.8 138.8 138.8 KTracks (user accessible) (4KN or 512E / 512N)
Tracks per in 335 335 335 KTPI (average) (4KN or 512E / 512N)
Peak bits per in 2091/2277 2091/2277 2091/2277 Kbits/in
Areal density 684/744 684/744 684/744 Gb/in2 (4KN or 512E / 512N)
Disk rotation speed 15K 15K 15K RPM
Avg rotational latency 2.0 2.0 2.0 ms
4.2 Seek performance characteristics
4.2.1 Format command execution time for 512-byte sectors (minutes)
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte
Transfer to the Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
4.2.2 Fast Format
Drive sector size transition
• Single code to support sector sizes from 512E to 4KN
• T10 fast format conversion between 4KNand 512E configurations in the field.
• Possible only if sector sizes are exact multiples of 8 & vice versa
• The selected sector size will take effect only after fast format or full format
• Drive default is 512E from the factory.
• 512E / 4KN features set after Fast Format
T10 Fast Format
• Implements the fast format based on T10 Spec.
• To request Fast Format, the FFMT bits (Byte 4, Bits 1:0) should be set to 01b.
• A setting of 10b or 11b will return a check condition with 05/24 sense code (pointing to FFMT MSB in CDB).
Mode Select - Parameter list header
• Set Write buffer: // Set Block Descriptor Length = 0x08, Number of LBA's = 0xFFFFFFFF
• 00 00 00 00 00 00 00 08 FF FF FF FF 00 00 02 00 // Set block size to 0512 (0x0200)
•10 00 // Set block size to 4096 (0x1000)
• Then Send Mode Select Command
• cdb: 55 01 00 00 00 00 00 00 10 00 // (SP bit = 1, Parameter list = 0x10)
Format Unit - Parameter list header
• Set Write buffer: // Set IMMED = 1
• 00 02 00 00
• Then Send Format Unit Command
• cdb: 04 14 00 00 01 00 // (FMTDAT = 1, DEFECT LIST FORMAT = 010b, FFMT = 01b)
900GB Models 600GB Models 300GB models
Maximum (with verify) 180 120 60
Maximum (without verify) 90 60 30
Seagate Exos 15E900 SAS Product Manual, Rev. B 18
4.2.3 General performance characteristics
4.3 Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command
with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery
procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP)
primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT
command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE
SPINUP) primitive through either port, the drive becomes ready for normal operations within 20 seconds (excluding the error
recovery procedure).
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY
(ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 seconds (maximum) from
removal of DC power. SCSI stop time is 20 seconds. There is no power control switch on the drive.
4.4 Prefetch/multi-segmented cache control
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance
system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the
host sends the Mode Select command with the proper values in the applicable bytes in page 08h. Prefetch and cache operations are
independent features from the standpoint that each is enabled and disabled independently using the Mode Select command;
however, in actual operation, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in
Table 12 for 300GB, Table 13 for 600GB and Table 14 for 900GB.
4.5 Cache operation
Note. Refer to the SAS Interface Manual for more detail concerning the cache bits.
Of the 256MB physical buffer space in the drive, approximately 66MB for 512E/4KN and 84MB for 512N are available as a data cache.
The remaining buffer space is reserved for internal drive use.
The drive keeps track of the logical block addresses of the data stored in each segment of the buffer. If the cache is enabled (see RCD
bit in the SAS Interface Manual ), data requested by the host with a read command is retrieved from the buffer, if possible, before any
disk access is initiated. If cache operation is not enabled, the buffer is still used, but only as circular buffer segments during disk
medium read operations (disregarding Prefetch operation for the moment). That is, the drive does not check in the buffer segments
for the requested read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer
segment on the way to the host. All data transfers to the host are in accordance with buffer-full ratio rules. See the explanation
provided with the information about Mode Page 02h (disconnect/reconnect control) in the SAS Interface Manual.
Sustained transfer rate 210 to 315 MB/s 512E / 4KN **
205 to 300 MB/s 512N **
SAS Interface maximum instantaneous transfer rate 1200 MB/s* per port
(dual port = 2,400 MB/s*)
Logical block sizes
512 (default), 520 and 528
4k - 4096 (default), 4160 and 4224
Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact
(for flaws reallocated at format time using the spare sectors per sparing zone reallocation scheme.)
Negligible
Average rotational latency 2.0 ms
* Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
** MB/s ÷ 1.048 = MiB/s
Seagate Exos 15E900 SAS Product Manual, Rev. B 19
The following is a simplified description of the prefetch/cache operation:
Case A—read command is received and all of the requested logical blocks are already in the cache:
1. Drive transfers the requested logical blocks to the initiator.
Case B—A Read command requests data, and at least one requested logical block is not in any segment of the cache:
1. The drive fetches the requested logical blocks from the disk and transfers them into a segment, and then from there to the host in accordance
with the Mode Select Disconnect/Reconnect parameters, page 02h.
2. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.
Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical blocks. The drive
dynamically creates and removes segments based on the workload. The wrap-around capability of the individual segments greatly
enhances the cache’s overall performance..
4.5.1 Caching write data
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the
medium is stored while the drive performs the Write command.
If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made available for future read
cache hits. The same buffer space and segmentation is used as set up for read functions. The buffer segmentation scheme is set up or
changed independently, having nothing to do with the state of RCD. When a write command is issued, if RCD=0, the cache is first
checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If
there are, the respective cache segments are cleared. The new data is cached for subsequent Read commands.
If the number of write data logical blocks exceed the size of the segment being written into, when the end of the segment is reached,
the data is written into the beginning of the same cache segment, overwriting the data that was written there at the beginning of
the operation; however, the drive does not overwrite data that has not yet been written to the medium.
If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data has been transferred
into the cache, but before the data has been written to the medium. If an error occurs while writing the data to the medium, and
Good status has already been returned, a deferred error will be generated.
The Synchronize Cache command may be used to force the drive to write all cached write data to the medium. Upon completion of
a Synchronize Cache command, all data received from previous write commands will have been written to the medium.
in Table 12 for 300GB, Table 13 for 600GB and Table 14 for 900GB shows the mode default settings.
4.5.2 Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disk immediately beyond that which was requested by a
Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read
commands that request those logical blocks (this is true even if cache operation is disabled). Though the prefetch operation uses the
buffer as a cache, finding the requested data in the buffer is a prefetch hit, not a cache operation hit.
To enable prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch.
The drive does not use the Max Prefetch field (bytes 8 and 9) or the Prefetch Ceiling field (bytes 10 and 11).
When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous blocks from the disk
when it senses that a prefetch hit will likely occur. The drive disables prefetch when it decides that a prefetch hit is not likely to occur.
4.5.3 Hybrid caching operations
Hybrid caching operation Read data that has been promoted into the hybrid read cache does not persist through a power cycle. The
read data can always be retrieved from the rotating media.
When WCE=0, Hybrid 15K provides NVC-protected write caching over the portion of the DRAM used to coalesce writes. Write data
only goes into NVC when there is an unexpected power loss to the drive. The NVC has 90-day data retention.
If WCE=1, then a hybrid drive will operate on writes like a standard HDD–writes in cache are not protected by NVC and may be lost
with power loss.”
Note
The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15. The value 0XFFFF is always
reported regardless of the actual size of the segment. Sending a size specification using the Mode Select command (bytes
14 and 15) does not set up a new segment size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive
responds as it does for any attempt to change an unchangeable parameter.
Note Write caching in this section is the traditional SCSI write caching (WCE=1) where writes are not protected on power loss.
Note Refer to the SAS Interface Manual for more detail concerning the cache bits.
Seagate Exos 15E900 SAS Product Manual, Rev. B 20
5.0 Reliability specifications
The following reliability specifications assume correct host and drive operational interface, including all interface timings, power
supply voltages, environmental requirements and drive mounting constraints.
5.1 Error rates
The error rates stated in this manual assume the following:
• The drive is operated in accordance with this manual using DC power as defined in paragraph 6.4, "DC power requirements."
• Errors caused by host system failures are excluded from error rate computations.
•Assume random data.
• Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write retries and full retry time.
5.1.1 Recoverable Errors
Recoverable errors are those detected and corrected by the drive, and do not require user intervention.
Recoverable Data errors will use Error Correction when needed.
Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read, and using write
bits transferred for recoverable errors occurring during a write.
5.1.2 Unrecoverable Errors
An unrecoverable data error is defined as a failure of the drive to recover data from the media. These errors occur due to head/media
or write problems. Unrecoverable data errors are only detected during read operations, but not caused by the read. If an
unrecoverable data error is detected, a MEDIUM ERROR (03h) in the Sense Key will be reported. Multiple unrecoverable data errors
resulting from the same cause are treated as 1 error.
5.1.3 Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the
drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (Error code = 15h
or 02h) will be reported with a Hardware error (04h) in the Sense Key. Recoverable seek errors are specified at Less than 10 errors in
108 seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.
5.1.4 Interface errors
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port connected to
the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or CRC error.
Seek error rate: Less than 10 errors in 108 seeks
Read Error Rates1
1. Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
Recovered Data Less than 10 errors in 1012 bits transferred (OEM default settings)
Unrecovered Data Less than 1 sector in 1016 bits transferred
Miscorrected Data Less than 1 sector in 1021 bits transferred
Interface error rate: Less than 1 error in 1012 bits transferred
Mean Time Between Failure (MTBF): 2,000,000 hours
Annualized Failure Rate (AFR) 0.44%
Preventive maintenance: None required
Seagate Exos 15E900 SAS Product Manual, Rev. B 21
5.2 Reliability and service
Integrators can enhance the reliability of Exos 15E900 SAS disk drives can be enhanced by ensuring that the drive receives adequate
cooling. Section 6.0 provides temperature measurements and other information that may be used to enhance the service life of the
drive. Section 10.2 provides recommended air-flow information.
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)
The production disk drive shall achieve an annualized failure-rate of 0.44% (MTBF of 2,000,000 hours) over a 5 year service life when
used in Enterprise Storage field conditions as limited by the following:
• 8760 power-on hours per year.
• HDA temperature as reported by the drive <= 50C
• Ambient wet bulb temp <= 26°C
• The AFR (MTBF) is a population statistic not relevant to individual units.
• ANSI/ISA S71.04-2013 G2 classification levels and dust contamination to ISO 14644-1 Class 8 standards (as measured at the device)
The MTBF specification for the drive assumes the operating environment is designed to maintain nominal drive temperature and
humidity. The rated MTBF is based upon a sustained drive temperature of up to 122°F (50°C) and wet bulb temperature up to 78.8°F
(26°C). Occasional excursions in operating conditions between the rated MTBF conditions and the maximum drive operating
conditions may occur without significant impact to the rated MTBF. However continual or sustained operation beyond the rated
MTBF conditions will degrade the drive MTBF and reduce product reliability.
5.2.2 Preventive maintenance
No routine scheduled preventive maintenance is required.
5.2.3 Hot plugging the drive
When a disk is powered on by switching the power or hot plugged, the drive runs a self test before attempting to communicate on
its’ interfaces. When the self test completes successfully, the drive initiates a Link Reset starting with OOB. An attached device should
respond to the link reset. If the link reset attempt fails, or any time the drive looses sync, the drive initiated link reset. The drive will
initiate link reset once per second but alternates between port A and B. Therefore each port will attempt a link reset once per 2
seconds assuming both ports are out of sync.
If the self-test fails, the drive does not respond to link reset on the failing port.
5.2.4 S.M.A.R.T.
S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions
that indicate imminent drive failure and is designed to provide sufficient warning of a failure to allow an application to back up the
data before an actual failure occurs.
Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating performance of the drive
and the thresholds are optimized to minimize “false” and “failed” predictions.
Controlling S.M.A.R.T.
The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control mode page
(1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEXCPT bit disables all S.M.A.R.T. functions. When
enabled, S.M.A.R.T. collects on-line data as the drive performs normal read and write operations. When the PERF bit is set, the drive is
considered to be in “On-line Mode Only” and will not perform off-line functions.
Applications can measure off-line attributes and force the drive to save the data by using the Rezero Unit command. Forcing
S.M.A.R.T. resets the timer so that the next scheduled interrupt is in one hour.
Applications can interrogate the drive through the host to determine the time remaining before the next scheduled measurement
and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E. This allows applications to
control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command resets the timer.
Note
It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard,
shorting of PCBA to ground, or ESD potential hazard is presented during the hot connect/disconnect
operation. Discharge the static electricity from the drive carrier prior to inserting it into the system.
Caution The drive motor must come to a complete stop prior to changing the
plane of operation. This time is required to insure data integrity.
Note The drive’s firmware monitors specific attributes for degradation
over time but can’t predict instantaneous drive failures.
Seagate Exos 15E900 SAS Product Manual, Rev. B 22
Performance impact
S.M.A.R.T. attribute data is saved to the disk so that the events that caused a predictive failure can be recreated. The drive measures
and saves parameters once every hour subject to an idle period on the drive interfaces. The process of measuring off-line attribute
data and saving data to the disk is interruptable. The maximum on-line only processing delay is summarized below:
Reporting control
Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to the reporting method.
For example, if the MRIE is set to one, the firmware will issue to the host an 01-5D00 sense code. The FRU field contains the type of
predictive failure that occurred. The error code is preserved through bus resets and power cycles.
Determining rate
S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors increases to an
unacceptable level. To determine rate, error events are logged and compared to the number of total operations for a given attribute.
The interval defines the number of operations over which to measure the rate. The counter that keeps track of the current number of
operations is referred to as the Interval Counter.
S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of the number of errors for
the current interval. This counter is referred to as the Failure Counter.
Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set thresholds for the
number of errors and their interval. If the number of errors exceeds the threshold before the interval expires, the error rate is
considered to be unacceptable. If the number of errors does not exceed the threshold before the interval expires, the error rate is
considered to be acceptable. In either case, the interval and failure counters are reset and the process starts over.
Predictive failures
S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firmware keeps a running
count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented each
time the error rate is unacceptable and decremented (not to exceed zero) whenever the error rate is acceptable. If the counter
continually increments such that it reaches the predictive threshold, a predictive failure is signaled. This counter is referred to as the
Failure History Counter. There is a separate Failure History Counter for each attribute.
5.2.5 Thermal monitor
Exos 15E900 SAS drives implement a temperature warning system which:
1. Signals the host if the temperature exceeds a value which would threaten the drive.
2. Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value.
A temperature sensor monitors the drive temperature and issues a warning over the interface when the temperature exceeds a set
threshold. The temperature is measured at power-up and then at ten-minute intervals after power-up.
The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified limit in compliance
with the SCSI standard.
This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled by the Method of Reporting
Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC) mode page (1Ch).
[a]. Do not reset the log parameter.
[b]. Do not make any requested changes in any field in any log parameter in any log page.
Maximum processing delay
Fully-enabled delay DEXCPT = 0
S.M.A.R.T. delay times 70 milliseconds
Table 3 Temperature Log Page (0Dh)
Parameter Code Description Resettable or
Changeable
Support
Required
0000h Primary Temperature Never [a] [b] Mandatory
0001h Reference Temperature Never [a] [b] Optional
Seagate Exos 15E900 SAS Product Manual, Rev. B 23
5.2.6 Drive Self Test (DST)
Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit. DST validates
the functionality of the drive at a system level.
There are two test coverage options implemented in DST:
1. Extended test
2. Short test
The most thorough option is the extended test that performs various tests on the drive and scans every logical block address (LBA)
of the drive. The short test is time-restricted and limited in length—it does not scan the entire media surface, but does some
fundamental tests and scans portions of the media.
If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test, remove it from service and
return it to Seagate for service.
5.2.6.1 DST failure definition
The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log page if a functional
failure is encountered during DST. The channel and servo parameters are not modified to test the drive more stringently, and the
number of retries are not reduced. All retries and recovery processes are enabled during the test. If data is recoverable, no failure
condition will be reported regardless of the number of retries required to recover the data.
The following conditions are considered DST failure conditions:
• Seek error after retries are exhausted
• Track-follow error after retries are exhausted
• Read error after retries are exhausted
• Write error after retries are exhausted
Recovered errors will not be reported as diagnostic failures.
5.2.6.2 Implementation
This section provides all of the information necessary to implement the DST function on this drive.
5.2.6.2.1 State of the drive prior to testing
The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons why a drive may not be
ready, some of which are valid conditions, and not errors. For example, a drive may be in process of doing a format, or another DST. It
is the responsibility of the host application to determine the “not ready” cause.
While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.
A Drive Not Ready condition is reported by the drive under the following conditions:
• Motor will not spin
• Motor will not lock to speed
• Servo will not lock on track
• Drive cannot read configuration tables from the disk
In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.
5.2.6.2.2 Invoking DST
To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short test or 010b for the
extended test) in bytes 1, bits 5, 6, and 7.
5.2.6.2.3 Short and extended tests
DST has two testing options:
1. short
2. extended
These testing options are described in the following two subsections.
Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan segment.
Short test (Function Code: 001b)
The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within 120 seconds. The
short test does not scan the entire media surface, but does some fundamental tests and scans portions of the media. A complete
read/verify scan is not performed and only factual failures will report a fault condition. This option provides a quick confidence test
of the drive.
Seagate Exos 15E900 SAS Product Manual, Rev. B 24
Extended test (Function Code: 010b)
The objective of the extended test option is to empirically test critical drive components. For example, the seek tests and on-track
operations test the positioning mechanism. The read operation tests the read head element and the media surface. The write
element is tested through read/write/read operations. The integrity of the media is checked through a read/verify scan of the media.
Motor functionality is tested by default as a part of these tests.
The anticipated length of the Extended test is reported through the Control Mode page.
5.2.6.2.4 Log page entries
When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry is created by inserting a new self-
test parameter block at the beginning of the self-test results log parameter section of the log page. Existing data will be moved to
make room for the new parameter block. The drive reports 20 parameter blocks in the log page. If there are more than 20 parameter
blocks, the least recent parameter block will be deleted. The new parameter block will be initialized as follows:
1. The Function Code field is set to the same value as sent in the DST command
2. The Self-Test Results Value field is set to Fh
3. The drive will store the log page to non-volatile memory
After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its Self-Test Results Log page in
non-volatile memory. The host may use Log Sense to read the results from up to the last 20 self-tests performed by the drive. The
self-test results value is a 4-bit field that reports the results of the test. If the field is set to zero, the drive passed with no errors
detected by the DST. If the field is not set to zero, the test failed for the reason reported in the field.
The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The Sense key, ASC, ASCQ,
and FRU are used to report the failure condition.
5.2.6.2.5 Abort
There are several ways to abort a diagnostic. A SCSI Bus Reset or a Bus Device Reset message can be used to abort the diagnostic.
To abort a DST executing in background mode, use the abort code in the DST Function Code field. This will cause a 01 (self-test
aborted by the application client) code to appear in the self-test results values log. All other abort mechanisms will be reported as a
02 (self-test routine was interrupted by a reset condition).
5.2.7 Product warranty
See “Seagate® Technology Support Services” on page 7 for warranty contact information.
Shipping
When transporting or shipping a drive, use only a Seagate-approved container. Keep the original box. Seagate approved containers
are easily identified by the Seagate Approved Package label. Shipping a drive in a non-approved container voids the drive warranty.
Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in transit. Contact the
authorized Seagate distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in
handling computer equipment.
Product repair and return information
Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does not sanction any third-
party repair facilities. Any unauthorized repair or tampering with the factory seal voids the warranty.
Storage
The maximum recommended storage period for the drive in a non-operational environment is 90 days. Drives should be stored in
the original unopened Seagate shipping packaging when ever possible. Once the drive is removed from the Seagate original
packaging the recommended maximum period between drive operation cycles is 30 days. During any storage period the drive non-
operational temperature, humidity, wet bulb, atmospheric conditions, shock, vibration, magnetic and electrical field specifications
should be followed.
Seagate Exos 15E900 SAS Product Manual, Rev. B 25
6.0 Physical/electrical specifications
This section provides information relating to the physical and electrical characteristics of the drive.
6.1 PowerChoiceTM power management
Drives using the load/unload architecture provide programmable power management to tailor systems for performance and greater
energy efficiency.
The table below lists the supported PowerChoice modes. The further down in the table, the more power savings can be realized. For
example, Idle_B mode results in greater power savings than Idle_A mode. Standby_Z mode results in the greatest power savings.
PowerChoice modes
PowerChoiceTM can be invoked using one of these two methods:
• Power Condition mode page method—Enable and initialize the idle condition timers and/or the standby condition timers. The timer values are
based on the values set in the Power Condition mode page.
• START STOP UNIT command method—Use the START STOP UNIT command (OPERATION CODE 1Bh). This allows the host to directly transition the
drive to any supported PowerChoice mode.
If both the Power Condition mode page and START STOP UNIT command methods are used, the START STOP UNIT command request
takes precedence over the Power Condition mode page power control and may disable the idle condition and standby condition
timers. The REQUEST SENSE command reports the current PowerChoice state if active and also the method by which the drive
entered the PowerChoice state.
When the drive receives a command, all power condition timers are suspended if they were enabled via the Power Condition mode
page. Once all outstanding commands are processed, the power condition timers are reinitialized to the values defined in the Power
Condition mode page
Mode Description
Idle_A Reduced electronics
Idle_B Heads unloaded. Disks spinning at full RPM
Idle_C Heads unloaded. Disks spinning at reduced RPM
Standby_Y Heads unloaded. Disks spinning at reduced RPM.
Recovery requires the NOTIFY (Enable Spinup) command.
Standby_Z Heads unloaded. Motor stopped (disks not spinning)
Recovery requires the NOTIFY (Enable Spinup) command.
Seagate Exos 15E900 SAS Product Manual, Rev. B 26
6.1.1 PowerChoice reporting methods
PowerChoiceTM provides these reporting methods for tracking purposes:
Request Sense command reports
• Current power condition
• Method of entry
.
Mode Sense command reports (mode page 0x1A)
• Idle conditions enabled / disabled
• Idle condition timer values (100ms increments) (default, saved, current, changeable)
Power Condition Vital Product Data (VPD) Page (VPD page 0x8A)
• Supported power conditions
• Typical recovery time from power conditions (1ms increments)
Start/Stop Cycle Counter Log Page reports (log page 0x0E)
• Specified and accumulated Start/Stops and Load/Unload cycles
Power Condition Transitions Log Page reports (log page 0x1A, subpage 0x00)
• Accumulated transitions to Active, Idle_A, Idle_B, Idle_C, Standby_Y, Standby_Z
6.2 Power Balance
• Mode page 01h byte 6 bits 0 & 1 define the Active Level
• Active Levels - 00b Default,11b Lowest active power level
6.3 AC power requirements
None.
Note Processing the Request Sense command does not impact the drive’s power save state.
Seagate Exos 15E900 SAS Product Manual, Rev. B 27
6.4 DC power requirements
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion of the
drive controller ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V supply of about
30mA and a commensurate increase of about 150mW in power consumption. There is no additional drain on the 12V supply.
Table 4 300GB models DC power requirements
Notes
300GB 512N, 512E / 4KN
12.0 Gb mode
Parameter (Amps) (Amps) Watts
Voltage +5V +12V [2] Total
Regulation [5] ±5% ±5% [2]
Avg idle current DC [1] [7] 0.41 0.22 4.70
Advanced Idle Current
Idle_A 0.41 0.22 4.64
Idle_B 0.28 0.20 3.79
Idle_C 0.26 0.12 2.70
Standby_Z 0.25 0.01 1.31
Maximum Start current
DC (peak DC) [3] 0.83 1.51
AC (peak AC) [3] 0.95 2.02
Delayed motor start (max) DC [1] [4] 0.52 0.07 3.46
Peak operating current: (random read)
Typical DC [1] [6] 0.44 0.39 6.93
Maximum DC [1] 0.45 0.41 7.12
Maximum (peak) DC 1.38 1.34
Peak operating current: (random write)
Typical DC [1] 0.50 0.28 5.87
Maximum DC [1] 0.50 0.29 5.96
Maximum (peak) DC 0.93 1.39
Peak operating current: (sequential read)
Typical DC [1] 0.83 0.21 6.71
Maximum DC [1] 0.88 0.22 6.96
Maximum (peak) DC 1.28 0.48
Peak operating current: (sequential write)
Typical DC [1] 0.75 0.21 6.30
Maximum DC [1] 0.76 0.22 6.37
Maximum (peak) DC 0.94 1.25
Seagate Exos 15E900 SAS Product Manual, Rev. B 28
Table 5 600GB models DC power requirements
Notes
600GB 512N, 512E / 4KN
12.0 Gb mode
Parameter (Amps) (Amps) Watts
Voltage +5V +12V [2] Total
Regulation [5] ±5% ±5% [2]
Avg idle current DC [1] [7] 0.49 0.29 5.84
Advanced Idle Current
Idle_A 0.42 0.26 5.24
Idle_B 0.29 0.23 4.20
Idle_C 0.27 0.13 2.85
Standby_Z 0.25 0.01 1.32
Maximum Start current
DC (peak DC) [3] 0.92 1.48
AC (peak AC) [3] 1.26 2.00
Delayed motor start (max) DC [1] [4] 0.53 0.06 3.43
Peak operating current: (random read)
Typical DC [1] [6] 0.43 0.42 7.23
Maximum DC [1] 0.44 0.44 7.46
Maximum (peak) DC 1.37 1.39
Peak operating current: (random write)
Typical DC [1] 0.49 0.32 6.24
Maximum DC [1] 0.50 0.32 6.36
Maximum (peak) DC 0.90 1.40
Peak operating current: (sequential read)
Typical DC [1] 0.83 0.26 7.27
Maximum DC [1] 0.86 0.26 7.43
Maximum (peak) DC 1.29 0.50
Peak operating current: (sequential write)
Typical DC [1] 0.74 0.26 6.84
Maximum DC [1] 0.76 0.26 6.94
Maximum (peak) DC 0.92 1.34
Seagate Exos 15E900 SAS Product Manual, Rev. B 29
[1] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these values. Power supply at nominal voltage. N
(number of drives tested) = 6, 35 Degrees C ambient.
[2] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 15K RPM. The ±5% must be main-
tained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initia-
tor.
[3] See +12V current profile in Figure 1.
[4] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.
[5] See paragraph 6.4.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.
[6] Operating condition is defined as random 8 block reads.
[7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.
Table 6 900GB models DC power requirements
Notes
900GB 512N, 512E / 4KN
12.0 Gb mode
Parameter (Amps) (Amps) Watts
Voltage +5V +12V [2] Total
Regulation [5] ±5% ±5% [2]
Avg idle current DC [1] [7] 0.42 0.30 5.72
Advanced Idle Current
Idle_A 0.42 0.30 5.67
Idle_B 0.28 0.26 4.46
Idle_C 0.27 0.13 2.86
Standby_Z 0.25 0.01 1.35
Maximum Start current
DC (peak DC) [3] 0.81 1.52
AC (peak AC) [3] 0.90 2.18
Delayed motor start (max) DC [1] [4] 0.53 0.07 3.48
Peak operating current: (random read)
Typical DC [1] [6] 0.44 0.45 7.60
Maximum DC [1] 0.44 0.48 7.95
Maximum (peak) DC 1.43 1.15
Peak operating current: (random write)
Typical DC [1] 0.48 0.34 6.50
Maximum DC [1] 0.49 0.35 6.66
Maximum (peak) DC 0.96 1.42
Peak operating current: (sequential read)
Typical DC [1] 0.84 0.30 7.86
Maximum DC [1] 0.86 0.31 8.00
Maximum (peak) DC 1.25 1.10
Peak operating current: (sequential write)
Typical DC [1] 0.76 0.31 7.47
Maximum DC [1] 0.78 0.31 7.63
Maximum (peak) DC 0.98 1.41
Seagate Exos 15E900 SAS Product Manual, Rev. B 30
General DC power requirement notes.
1. Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.
2. The +5V and +12V supplies should employ separate ground returns.
3. Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be
noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device.
4. Parameters, other than spindle start, are measured after a 10-minute warm up.
5. Drive background activity can cause instantaneous +5V and +12V current peaks in excess of the stated values
6.4.1 Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a defined frequency range. Maximum allowed noise
values given below are peak-to-peak measurements and apply at the drive power connector.
6.4.2 Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.
6.4.3 Current profiles
The +12V and +5V current profiles for the Seagate Exos 15E900 drives are shown below.
Figure 1. Current profile for 300GB models
+5V = 250 mV pp from 100 Hz to 20 MHz.
+12V = 450 mV pp from 100 Hz to 100 KHz.
250 mV pp from 100 KHz to 20 MHz.
150 mV pp from 20 MHz to 80 MHz.
Seagate Exos 15E900 SAS Product Manual, Rev. B 31
Figure 2. Current profile for 600GB models
Seagate Exos 15E900 SAS Product Manual, Rev. B 33
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 4. 300GB models (12Gb) DC current and power vs. input/output operations per second
To obtain operating power for typical random write operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 5. 300GB models (12Gb) DC current and power vs. input/output operations per second
Writes
Seagate Exos 15E900 SAS Product Manual, Rev. B 34
600GB models in 12Gb operation
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 6. 600GB models (12Gb) DC current and power vs. input/output operations per second
To obtain operating power for typical random write operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 7. 600GB models (12Gb) DC current and power vs. input/output operations per second
Writes
Seagate Exos 15E900 SAS Product Manual, Rev. B 35
900GB models in 12Gb operation
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 8. 900GB models (12Gb) DC current and power vs. input/output operations per second
To obtain operating power for typical random write operations, refer to the following I/O rate curve (see Figure 4). Locate the typical
I/O rate for a drive in the system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts
on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 9. 900GB models (12Gb) DC current and power vs. input/output operations per second
900
Writes
900
Seagate Exos 15E900 SAS Product Manual, Rev. B 36
6.6 Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part.
Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C).
6.6.1 Temperature
a. Operating
41°F to 131°F (5°C to 55°C) drive temperature range with a maximum temperature gradient of 36°F (20°C) per hour.
The maximum allowable drive temperature is 140°F (60°C)..
Non-operating
–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is
packaged in the shipping container designed by Seagate for use with drive.
6.6.2 Humidity
The values below assume that no condensation on the drive occurs. Maximum wet bulb temperature is 84.2°F (29°C).
a. Operating
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
b. Non-operating
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
6.6.3 Effective altitude (sea level)
a. Operating
–1000 to +10,000 ft (–304.8 to +3048 m)
b. Non-operating
–1000 to +40,000 ft (–304.8 to +12,192 m)
Note To maintain optimal performance drives should be run at nominal drive temperatures and humidity.
Note Operating drive temperature references temperature reported by the drive on Log Page 0Dh
Note
Air flow may be required to achieve consistent nominal drive temperature values (see Section 9.2). To
confirm that the required cooling is provided for the electronics and HDA, place the drive in its final
mechanical configuration, and perform random write/read operations. After the temperatures stabilize,
read drive temperature from Temperature Log Page (0Dh).
Seagate Exos 15E900 SAS Product Manual, Rev. B 37
6.6.4 Shock and vibration
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is installed in an
enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur internally to the enclosure resulting in
drive movement in excess of the stated limits. If this situation is apparent, it may be necessary to modify the enclosure to minimize
drive movement.
The limits of shock and vibration defined within this document are specified with the drive mounted by any of the four methods
shown in Figure 10, and in accordance with the restrictions of Section 10.3.
6.6.4.1 Shock
a. Operating—normal
The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not exceeding 40 Gs at a maximum
duration of 11 ms (half sinewave). The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not
exceeding 25 Gs at a maximum duration of 2 ms (half sinewave). Shock may be applied in the X, Y, or Z axis.
b. Operating—abnormal
Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent shock not exceeding 40 Gs at a
maximum duration of 11 ms (half sinewave). Shock occurring at abnormal levels may promote degraded operational performance during the
abnormal shock period. Specified operational performance will continue when normal operating shock levels resume. Shock may be applied in
the X, Y, or Z axis. Shock is not to be repeated more than two times per second.
c. Non-operating
The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes both isolated drives and integrated
drives.
The drive subjected to nonrepetitive shock not exceeding 80 Gs at a duration of 11 ms (half sinewave) shall not exhibit device damage or perfor-
mance degradation. Shock may be applied in the X, Y, or Z axis.
The drive subjected to nonrepetitive shock not exceeding 400 Gs at a duration of 2 ms (half sinewave) does not exhibit device damage or per-
formance degradation. Shock may be applied in the X, Y, or Z axis.
The drive subjected to nonrepetitive shock not exceeding 300 Gs at a duration of 0.5 ms (half sinewave) does not exhibit device damage or per-
formance degradation. Shock may be applied in the X, Y, or Z axis.
d. Packaged
Seagate finished drive bulk packs are designed and tested to meet or exceed applicable ISTA and ASTM standards. Volume finished drives will
be shipped from Seagate factories on pallets to minimize freight costs and ease material handling. Seagate finished drive bulk packs may be
shipped individually. For less than full shipments, instructions are printed on the bulk pack carton for minimum drive quantities and proper
drive placement.
Figure 10. Recommended mounting
Note Image is for reference only, may not represent actual drive.
Z
Y
X
ZY
X
Seagate Exos 15E900 SAS Product Manual, Rev. B 38
6.6.4.2 Vibration
a. Operating
The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not
exceeding:
5-500 Hz @ 0.5 G (zero to peak)
Vibration may be applied in the X, Y, or Z axis.
Operating normal translational random flat profile:
10 - 500 Hz (translational random flat profile) 0.5 GRMS
b. Non-operating
The limits of non-operating vibration shall apply to all conditions of handling and transportation. This includes both isolated drives and inte-
grated drives.
The drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding:
5-500 Hz @ 3.0 G (zero to peak)
Vibration may be applied in the X, Y, or Z axis.
Non-operating translational random flat profile:
10 - 500 Hz (translational random flat profile) 2.4 GRMS
6.6.5 Air cleanliness
The drive is designed to operate in a typical office environment with minimal environmental control.
6.6.6 Corrosive environment
Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to light industrial
environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM B845. However, this accelerated
testing cannot duplicate every potential application environment.
Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corrosive chemicals as
electronic drive component reliability can be affected by the installation environment. The silver, copper, nickel and gold films used
in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the
most damaging. In addition, electronic components should never be exposed to condensing water on the surface of the printed
circuit board assembly (PCBA) or exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication,
such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any electronic
equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.
6.6.7 Acoustics
Sound power during idle mode shall be 3.25 bels typical when measured to ISO 7779 specification.
Sound power during operating mode shall be 3.35 bels typical when measured to ISO 7779 specification.
There will not be any discrete tones more than 9 dB above the masking noise on typical drives when measured according to Seagate
specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.
6.6.8 Electromagnetic susceptibility
See Section 2.3, "Electromagnetic susceptibility."
6.7 Mechanical specifications
Refer to Figure 11 for detailed mounting configuration dimensions. See Section 10.3, “Drive mounting.”
Weight: 900 GB Models 0.480 lb 0.218 Kg
600GB models 0.486 lb 0.220 Kg
300GB models 0.474 lb 0.215 Kg
Note These dimensions conform to the Small Form Factor Standard documented in
SFF-8201 and SFF-8223, found at www.sffcommittee.org
Seagate Exos 15E900 SAS Product Manual, Rev. B 39
Figure 11. Dimensions
in mm
in
mm
in
mm
Seagate Exos 15E900 SAS Product Manual, Rev. B 40
7.0 About FIPS
The Federal Information Processing Standard (FIPS) Publication 140-2 is a U.S. Government Computer Security Standard used to
accredit cryptographic modules. It is titled 'Security Requirements for Cryptographic Modules (FIPS PUB 140-2)' and is issued by the
National Institute of Standards and Technology (NIST).
Purpose
This standard specifies the security requirements that will be satisfied by a cryptographic module utilized within a security system
protecting sensitive but unclassified information. The standard provides four increasing, qualitative levels of security: Level 1, Level
2, Level 3 and Level 4. These levels are intended to cover the wide range of potential applications and environments in which
cryptographic modules may be employed.
Validation Program
Products that claim conformance to this standard are validated by the Cryptographic Module Validation Program (CMVP) which is a
joint effort between National Institute of Standards and Technology (NIST) and the Communications Security Establishment (CSE) of
the Government of Canada. Products validated as conforming to FIPS 140-2 are accepted by the Federal agencies of both countries
for the protection of sensitive information (United States) or Designated Information (Canada).
In the CMVP, vendors of cryptographic modules use independent, accredited testing laboratories to have their modules tested.
National Voluntary Laboratory Accreditation Program (NVLAP) accredited laboratories perform cryptographic module compliance/
conformance testing.
Seagate Enterprise SED
The SEDs referenced in this Product Manual have been validated by CMVP and have been thoroughly tested by a NVLAP accredited
lab to satisfy FIPS 140-2 Level 2 requirements. In order to operate in FIPS Approved Mode of Operation, these SEDs require security
initialization. For more information, refer to 'Security Rules' section in the 'Security Policy' document uploaded on the NIST website.
To reference the product certification visit - http://csrc.nist.gov/groups/STM/cmvp/documents/140-1/1401vend.htm, and search for
“Seagate”.
Security Level 2
Security Level 2 enhances the physical security mechanisms of a Security Level 1 cryptographic module by adding the requirement for tamper-
evidence, which includes the use of tamper-evident coatings or seals on removable covers of the module. Tamper-evident coatings or seals are
placed on a cryptographic module so that the coating or seal must be broken to attain physical access to the critical security parameters (CSP)
within the module. Tamper-evident seals (example shown in Figure 12, page 40) are placed on covers to protect against unauthorized physical
access. In addition Security Level 2 requires, at a minimum, role-based authentication in which a cryptographic module authenticates the autho-
rization of an operator to assume a specific role and perform a corresponding set of services.
Figure 12. Example of FIPS tamper evidence labels/seals.
Note. Image is for reference only, may not represent actual drive.
Seagate Exos 15E900 SAS Product Manual, Rev. B 41
8.0 About self-encrypting drives
Self-encrypting drives (SEDs) offer encryption and security services for the protection of stored data, commonly known as
“protection of data at rest.” These drives are compliant with the Trusted Computing Group (TCG) Enterprise Storage Specifications as
detailed in Section 2.6.
The Trusted Computing Group (TCG) is an organization sponsored and operated by companies in the computer, storage and digital
communications industry. Seagate’s SED models comply with the standards published by the TCG.
To use the security features in the drive, the host must be capable of constructing and issuing the following two SCSI commands:
• Security Protocol Out
• Security Protocol In
These commands are used to convey the TCG protocol to and from the drive in their command payloads.
8.1 Data encryption
Encrypting drives use one inline encryption engine for each port, employing AES-256 data encryption in XEX-based tweaked
codebook mode with ciphertext stealing (XTS) mode to encrypt all data prior to being written on the media and to decrypt all data
as it is read from the media. The encryption engines are always in operation and cannot be disabled.
The 32-byte Data Encryption Key (DEK) is a random number which is generated by the drive, never leaves the drive, and is
inaccessible to the host system. The DEK is itself encrypted when it is stored on the media and when it is in volatile temporary
storage (DRAM) external to the encryption engine. A unique data encryption key is used for each of the drives possible 32 data
bands (see Section 8.5).
8.2 Controlled access
The drive has two security providers (SPs) called the "Admin SP" and the "Locking SP." These act as gatekeepers to the drive security
services. Security-related commands will not be accepted unless they also supply the correct credentials to prove the requester is
authorized to perform the command.
8.2.1 Admin SP
The Admin SP allows the drive's owner to enable or disable firmware download operations (see Section 8.4). Access to the Admin SP
is available using the SID (Secure ID) password or the MSID (Manufactures Secure ID) password.
8.2.2 Locking SP
The Locking SP controls read/write access to the media and the cryptographic erase feature. Access to the Locking SP is available
using the BandMasterX or EraseMaster passwords. Since the drive owner can define up to 32 data bands on the drive, each data
band has its own password called BandMasterX where X is the number of the data band (0 through 31).
8.2.3 Default password
When the drive is shipped from the factory, all passwords are set to the value of MSID. This 32-byte random value can only be read by
the host electronically over the interface. After receipt of the drive, it is the responsibility of the owner to use the default MSID
password as the authority to change all other passwords to unique owner-specified values.
8.3 Random number generator (RNG)
The drive has a 32-byte hardware RNG that it is uses to derive encryption keys or, if requested to do so, to provide random numbers
to the host for system use, including using these numbers as Authentication Keys (passwords) for the drive’s Admin and Locking SPs.
8.4 Drive locking
In addition to changing the passwords, as described in Section 8.2.3, the owner should also set the data access controls for the
individual bands.
The variable "LockOnReset" should be set to "PowerCycle" to ensure that the data bands will be locked if power is lost. In addition
"ReadLockEnabled" and "WriteLockEnabled" must be set to true in the locking table in order for the bands "LockOnReset" setting of
"PowerCycle" to actually lock access to the band when a "PowerCycle" event occurs. This scenario occurs if the drive is removed from
its cabinet. The drive will not honor any data read or write requests until the bands have been unlocked. This prevents the user data
from being accessed without the appropriate credentials when the drive has been removed from its cabinet and installed in another
system.
When the drive is shipped from the factory, the firmware download port is unlocked.
Seagate Exos 15E900 SAS Product Manual, Rev. B 42
8.5 Data bands
When shipped from the factory, the drive is configured with a single data band called Band 0 (also known as the Global Data Band)
which comprises LBA 0 through LBA max. The host may allocate Band1 by specifying a start LBA and an LBA range. The real estate for
this band is taken from the Global Band. An additional 30 Data Bands may be defined in a similar way (Band2 through Band31) but
before these bands can be allocated LBA space, they must first be individually enabled using the EraseMaster password.
Data bands cannot overlap but they can be sequential with one band ending at LBA (x) and the next beginning at LBA (x+1).
Each data band has its own drive-generated encryption key and its own user-supplied password. The host may change the
Encryption Key (see Section 8.6) or the password when required. The bands should be aligned to 4K LBA boundaries.
8.6 Cryptographic erase
A significant feature of SEDs is the ability to perform a cryptographic erase. This involves the host telling the drive to change the data
encryption key for a particular band. Once changed, the data is no longer recoverable since it was written with one key and will be
read using a different key. Since the drive overwrites the old key with the new one, and keeps no history of key changes, the user
data can never be recovered. This is tantamount to an instantaneous data erase and is very useful if the drive is to be scrapped or
redispositioned.
The Sanitize or TCG erase method can be invoked to cryptographically erase all user data on the drive by destroying the current data
encryption key and replacing it with a new random drive generated encryption key. Sanitize CRYPTOGRAPHIC ERASE is a SCIS CDB
Op Code 48h and service action code 3 (CRYPTOGRAPHIC ERASE).
8.7 Authenticated firmware download
In addition to providing a locking mechanism to prevent unwanted firmware download attempts, the drive also only accepts
download files which have been cryptographically signed by the appropriate Seagate Design Center.
Three conditions must be met before the drive will allow the download operation:
1. The download must be an SED file. A standard (base) drive (non-SED) file will be rejected.
2. The download file must be signed and authenticated.
3. As with a non-SED drive, the download file must pass the acceptance criteria for the drive. For example it must be applicable to the correct
drive model, and have compatible revision and customer status.
4. The firmware download port must be unlocked. When the drive is shipped from the factory, the firmware download port is unlocked.
8.8 Power requirements
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion of the
drive controller ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V supply of about
10mA and a commensurate increase of about 50mW in power consumption. There is no additional drain on the 12V supply. See the
tables in Section 6.4 for power requirements on the standard (non-SED) drive models.
8.9 Supported commands
The SED models support the following two commands in addition to the commands supported by the standard (non-SED) models
as listed in the table in Section 11.3, "SCSI commands supported":
• Security Protocol Out (B5h)
• Security Protocol In (A2h)
8.10 RevertSP
SED models will support the RevertSP feature which erases all data in all bands on the device and returns the contents of all SPs
(Security Providers) on the device to their original factory state. In order to execute the RevertSP method the unique PSID (Physical
Secure ID) printed on the drive label must be provided. PSID is not electronically accessible and can only be manually read from the
drive label or scanned in via the 2D barcode. RevertSP can be used to recover the use of drives when the passwords are lost.
Seagate Exos 15E900 SAS Product Manual, Rev. B 43
9.0 Defect and error management
Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data
integrity, perform drive self-maintenance, and validate proper drive operation.
SCSI defect and error management involves drive internal defect/error management and SAS system error considerations (errors in
communications between the initiator and the drive). In addition, Seagate provides the following technologies used to increase data
integrity and drive reliability:
• Deferred Auto-Reallocation (see Section 9.4)
The read error rates and specified storage capacities are not dependent on host (initiator) defect management routines.
9.1 Drive internal defects/errors
During the initial drive format operation at the factory, media defects are identified, tagged as being unusable, and their locations
recorded on the drive primary defects list (referred to as the “P’ list and also as the ETF defect list). At factory format time, these
known defects are also reallocated, that is, reassigned to a new place on the medium and the location listed in the defects
reallocation table. The “P” list is not altered after factory formatting. Locations of defects found and reallocated during error recovery
procedures after drive shipment are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator
using the Read Defect Data command.
Details of the SCSI commands supported by the drive are described in the SAS Interface Manual. Also, more information on the drive
Error Recovery philosophy is presented in the SAS Interface Manual.
9.2 Drive error recovery procedures
When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery procedures to attempt to
recover the data. The error recovery procedures used depend on the options previously set in the Error Recovery Parameters mode
page. Error recovery and defect management may involve using several SCSI commands described in the SAS Interface Manual. The
drive implements selectable error recovery time limits required in video applications.
The error recovery scheme supported by the drive provides a way to control the total error recovery time for the entire command in
addition to controlling the recovery level for a single LBA. The total amount of time spent in error recovery for a command can be
limited using the Recovery Time Limit bytes in the Error Recovery mode page. The total amount of time spent in error recovery for a
single LBA can be limited using the Read Retry Count or Write Retry Count bytes in the Error Recovery mode page.
The drive firmware error recovery algorithms consists of 20 levels for read recoveries and six levels for write. Each level may consist of
multiple steps, where a step is defined as a recovery function involving a single re-read or re-write attempt. The maximum level used
by the drive in LBA recovery is determined by the read and write retry counts.
The table on the next page equates the read and write retry count with the maximum possible recovery time for read and write
recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations are performed when
the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recovery time limit for the command has not yet
been met. Time needed to perform reallocation is not counted against the recovery time limit.
When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still perform data recovery
actions within the limits defined by the Read Retry Count, Write Retry Count, and Recovery Time Limit parameters. However, the
drive does not report any unrecovered errors.
Seagate Exos 15E900 SAS Product Manual, Rev. B 44
* For read retry count, every tick ~ 5% of total error recovery. Valid range setting is 1-20.
e.g. 1 ~ 5%
5 ~ 25%
20 ~ 100%
Setting these retry counts to a value below the default setting could result in degradation of the unrecovered error rate. For example,
suppose the read/write recovery page has the RC bit = 0 and if the read retry count is set to 5, this means ~ 25% of error recovery will
be executed which consumes 440 ms (please refer to the table above). If the limit is reached and a LBA has not yet been recovered
(i.e. requires retries beyond 440 ms), the command will end with Check Condition status report and unrecoverable read error will be
reported.
9.3 SAS system errors
Information on the reporting of operational errors or faults across the interface is given in the SAS Interface Manual. The SSP
Response returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results
of diagnostic operations performed by the drive.
Status returned by the drive to the initiator is described in the SAS Interface Manual. Status reporting plays a role in systems error
management and its use in that respect is described in sections where the various commands are discussed.
9.4 Deferred Auto-Reallocation
Deferred Auto-Reallocation (DAR) simplifies reallocation algorithms at the system level by allowing the drive to reallocate
unreadable locations on a subsequent write command. Sites are marked for DAR during read operations performed by the drive.
When a write command is received for an LBA marked for DAR, the auto-reallocation process is invoked and attempts to rewrite the
data to the original location. If a verification of this rewrite fails, the sector is re-mapped to a spare location.
This is in contrast to the system having to use the Reassign Command to reassign a location that was unreadable and then generate
a write command to rewrite the data. DAR is most effective when AWRE and ARRE are enabled—this is the default setting from the
Seagate factory. With AWRE and ARRE disabled DAR is unable to reallocate the failing location and will report an error sense code
indicating that a write command is being attempted to a previously failing location.
9.5 Protection Information (PI)
Protection Information is intended as a standardized approach to system level LRC traditionally provided by systems using 520 byte
formatted LBAs. Drives formatted with PI information provide the same, common LBA count (i.e. same capacity point) as non-PI
formatted drives. Sequential performance of a PI drive will be reduced by approximately 1.56% due to the extra overhead of PI being
transferred from the media that is not calculated as part of the data transferred to the host. To determine the full transfer rate of a PI
drive, transfers should be calculated by adding the 8 extra bytes of PI to the transferred LBA length, i.e. 512 + 8 = 520. PI formatted
drives are physically formatted to 520 byte sectors that store 512 bytes of customer data with 8 bytes of Protection Information
appended to it. The advantage of PI is that the Protection Information bits can be managed at the HBA and HBA driver level.
Allowing a system that typically does not support 520 LBA formats to integrate this level of protection.
Protection Information is valid with any supported LBA size. 512 LBA size is used here as common example.
Table 7 Read and write retry count maximum recovery times
Read retry count* Maximum recovery time per LBA
(cumulative, ms) Write retry count Maximum recovery time per LBA
(cumulative, ms)
036
1 155 1 54
5 535 2 80
10 1010 3 98
15 1484 4 176
20 (default) 1898 5 (default) 422
Seagate Exos 15E900 SAS Product Manual, Rev. B 45
9.5.1 Levels of PI
There are 4 types of Protection Information.
Type 0 - Describes a drive that is not formatted with PI information bytes. This allows for legacy support in non-PI systems.
Type 1 - Provides support of PI protection using 10 and 16 byte commands. The RDPROTECT and WRTPROTECT bits allow for
checking control through the CDB. Eight bytes of Protection Information are transmitted at LBA boundaries across the interface if
RDPROTECT and WRTPROTECT bits are nonzero values. Type 1 does not allow the use of 32 byte commands.
Type 2 - Provides checking control and additional expected fields within the 32 byte CDBs. Eight bytes of Protection Information are
transmitted at LBA boundaries across the interface if RDPROTECT and WRTPROTECT bits are nonzero values. Type 2 does allow the
use of 10 and 16 byte commands with zero values in the RDPROTECT and WRTPROTECT fields. The drive will generate 8 bytes
(e.g.0xFFFF) 8 bytes of Protection Information to be stored on the media, but the 8 bytes will not be transferred to the host during a
read command.
Type 3 - Seagate products do not support Type 3.
9.5.2 Setting and determining the current Type Level
A drive is initialized to a type of PI by using the format command on a PI capable drive. Once a drive is formatted to a PI Type, it may
be queried by a Read Capacity (16) command to report the PI type which it is currently formatted to. PI Types cannot coexist on a
single drive. A drive can only be formatted to a single PI Type. It can be changed at anytime to a new Type but requires a low level
format which destroys all existing data on the drive. No other vehicle for changing the PI type is provided by the T10 SBC3
specification.
Type 1 PI format CDB command: 04 90 00 00 00 00, Write Buffer: 00 A0 00 00
Type 2 PI format CDB command: 04 D0 00 00 00 00, Write Buffer: 00 A0 00 00
9.5.3 Identifying a Protection Information drive
The Standard Inquiry provides a bit to indicate if PI is support by the drive. Vital Product Descriptor (VPD) page 0x86 provides bits to
indicate the PI Types supported and which PI fields the drive supports checking..
9.6 Seagate RAID Rebuild ™
Seagate RAID Rebuild is an industry standard feature to enable faster recovery from a failed drive in a RAID configuration. It improves
RAID rebuild performance by extracting easily readable data from a failing drive. It quickly identifies blocks that would take longer to
recover from the failed drive than to rebuild from the remaining drives in the RAID group. This feature allows host control of error
recovery, maximizes up time, and minimizes likelihood of 2nd drive failure in a RAID configuration.
Note For further details with respect to PI, please refer to SCSI Block
Commands - 3 (SBC-3) Draft Standard documentation.
Seagate Exos 15E900 SAS Product Manual, Rev. B 46
10.0 Installation
Exos 15E900 SAS disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on the drive.
SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to accommodate
the drive. In such systems, the host system typically provides a carrier or tray into which the drive needs to be mounted. Mount the
drive to the carrier or tray provided by the host system using four M3 x 0.5 metric screws. When tightening the screws, use a
maximum torque of 4.5 in-lb +/- 0.45 in-lb. Do not over-tighten or force the screws. Mount the drive in any orientation.
Slide the carrier or tray into the appropriate bay in the host system using the instructions provided by the host system. This connects
the drive directly to the system’s SAS connector. The SAS connector is normally located on a SAS backpanel. See Section 11.4.1 for
additional information about these connectors.
Power is supplied through the SAS connector.
The drive is shipped from the factory low-level formatted in 512-byte logical blocks. Reformatting the drives needed only if wanting
to select a different logical block size.
Figure 13. Physical interface
10.1 Drive orientation
The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the drive in
horizontal (disks level) and vertical (drive on its side) orientations, which are the two preferred mounting orientations.
10.2 Cooling
Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive does not
result in the drive exceeding temperature conditions specified in Section 6.6.1, "Temperature."
The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and head and disk assembly
(HDA). Confirm that adequate heat removal is provided using the temperature measurement guidelines described in Section 6.6.1.
Forced air flow may be required to keep temperatures at or below the temperatures specified in Section 6.6.1 in which case the drive
should be oriented, or air flow directed, so that the least amount of air flow resistance is created while providing air flow to the
electronics and HDA. Also, the shortest possible path between the air inlet and exit should be chosen to minimize the travel length
of air heated by the drive and other heat sources within the rack, cabinet, or drawer environment.
Note
SAS drives are designed to be attached to the host system without I/O or power cables. If the
intent is to use the drive in a non-backplane host system, connecting the drive using high-quality
cables is acceptable as long as the I/O cable length does not exceed 10 meters (32.8 feet).
Note Image is for reference only, may not represent actual drive.
Seagate Exos 15E900 SAS Product Manual, Rev. B 47
If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 14. The air-flow patterns are created by one
or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow patterns are
acceptable as long as the temperature measurement guidelines of Section 6.6.1 are met.
Figure 14. Air flow
10.3 Drive mounting
Mount the drive using the bottom or side mounting holes. If mounting the drive using the bottom holes, ensure to not physically
distort the drive by attempting to mount it on a stiff, non-flat surface.
The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable
mounting surface stiffness:
where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion (units in inches or
millimeters). The out-of-plane distortion (X) is determined by defining a plane with three of the four mounting points fixed and
evaluating the out-of-plane deflection of the fourth mounting point when a known force (F) is applied to the fourth point.
10.4 Grounding
Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in
which the drive is mounted is connected directly to the HDA and PCBA with no electrically isolating shock mounts. If it is desired for
the system chassis to not be connected to the HDA/PCBA ground, the systems integrator or user must provide a nonconductive
(electrically isolating) method of mounting the drive in the host equipment.
Increased radiated emissions may result if the maximum surface area ground connection between system ground and drive ground
is not provided. This is the system designer’s and integrator’s responsibility.
Note Image of the HDA may not represent actual product, for reference only.
K x X = F < 15lb = 67N
Seagate Exos 15E900 SAS Product Manual, Rev. B 48
11.0 Interface requirements
This section partially describes the interface requirements as implemented on Exos 15E900 SAS drives. Additional information is
provided in the SAS Interface Manual (part number 100293071).
11.1 SAS features
This section lists the SAS-specific features supported by Exos 15E900 SAS drives.
11.1.1 Task management functions
The table below lists the SAS task management functions supported.
11.1.2 Task management responses
The table below lists the SAS response codes returned for task management functions supported.
11.2 Dual port support
Exos 15E900 SAS SAS drives have two independent ports. These ports may be connected in the same or different SCSI domains. Each
drive port has a unique SAS address.
The two ports have the capability of independent port clocking (e.g. both ports can run at 12Gb/s or the first port can run at 6Gb/s
while the second port runs at 3Gb/s.) The supported link rates are 3.0, 6.0, or 12.0 Gb/s.
Subject to buffer availability, the Exos 15E900 SAS drives support:
• Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both ports at the same time.
• Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports.
Table 8 SAS task management functions supported
Task name Supported
Abort Task Yes
Clear ACA Yes
Clear task set Yes
Abort task set Yes
Logical Unit Reset Yes
Query Task Yes
Table 9 Task management response codes
Function name Response code
Function complete 00
Invalid frame 02
Function not supported 04
Function failed 05
Function succeeded 08
Invalid logical unit 09
Seagate Exos 15E900 SAS Product Manual, Rev. B 49
11.3 SCSI commands supported
The table below lists the SCSI commands supported by Exos 15E900 SAS drives.
Table 10 Supported commands
Command name Command code Supported
Change Definition 40h N
Compare 39h N
Copy 18h N
Copy and Verify 3Ah N
Format Unit [1] [5] 04h Y
DCRT bit supported Y
DPRY bit supported N
DSP bit supported Y
IMMED bit supported Y
IP bit supported Y
SI (Security Initialize) bit supported N
STPF bit supported Y
VS (vendor specific) N
Inquiry 12h Y
Block Device Characteristics page (B1h) Y
Block Limits page (B0h) Y
Date Code page (C1h) Y
Device Behavior page (C3h) Y
Device Identification page (83h) Y
Extended Inquiry Data page (86h) Y
Firmware Numbers page (C0h) Y
Jumper Settings page (C2h) Y
Mode Page policy page (87h) N
Power Condition page (8Ah) Y
Power Consumption page (8Dh) N
Protocol Specific Logical unit Information page (90h) N
Protocol Specific Port Information page (91h) N
SCSI Ports page (88h) Y
Supported Vital Product Data page (00h) Y
Unit Serial Number page (80h) Y
Lock-unlock cache 36h N
Log Select (same log pages as Log Sense 4Dh) 4Ch Y
PCR bit Y
DU bit N
DS bit Y
TSD bit Y
ETC bit N
TMC bit N
LP bit N
Log Sense 4Dh Y
Application Client Log page (0Fh) Y
Buffer Over-run/Under-run page (01h) N
Cache Statistics page (37h) Y
Factory Log page (3Eh) Y
Information Exceptions Log page (2Fh) Y
Last n Deferred Errors or Asynchronous Events page (0Bh) N
Seagate Exos 15E900 SAS Product Manual, Rev. B 50
Last n Error Events page (07h) N
Non-medium Error page (06h) Y
Pages Supported list (00h) Y
Protocol-specific Log Page for SAS (18h) Y
Read Error Counter page (03h) Y
Read Reverse Error Counter page (04h) N
Self-test Results page (10h) Y
Start-stop Cycle Counter page (0Eh) Y
Temperature page (0Dh) Y
Verify Error Counter page (05h) Y
Write error counter page (02h) [6] Y
Mode Select (same pages as Mode Sense 1Ah) [3] 15h Y [2]
Mode Select (10) (same pages as Mode Sense 1Ah) [3] 55h Y
Mode Sense 1Ah Y [2]
Caching Parameters page (08h) Y
Control Mode page (0Ah) Y
Control Extension Mode Page (01h) Y
Disconnect/Reconnect (02h) Y
Error Recovery page (01h) Y
Format page (03h) Y
Information Exceptions Control page (1Ch) Y
Background Scan mode subpage (01h) Y
Notch and Partition Page (0Ch) N
Protocol-Specific Port page (19h) Y
Power Condition page (1Ah) Y
Rigid Disk Drive Geometry page (04h) Y
Unit Attention page (00h) Y
Verify Error Recovery page (07h) Y
Xor Control page (10h) N
Mode Sense (10) (same pages as Mode Sense 1Ah) [3] 5Ah Y
Persistent Reserve In 5Eh Y
Persistent Reserve Out 5Fh Y
Prefetch 34h N
Read (6) 08h Y
Read (10) 28h Y
DPO bit supported Y
FUA bit supported Y
Read (12) A8h N
Read (16) 88h Y
Read (32) 7Fh/0009h Y (Type 2 PI only)
Read Buffer (modes 0, 2, 3, Ah and Bh supported) 3Ch Y (non-SED drives only)
Read Capacity (10) 25h Y
Read Capacity (16) 9Eh/10h Y
Read Defect Data (10) 37h Y
Read Defect Data (12) B7h Y
Read Long 3Eh Y (non-SED drives only)
Read Long (16) 9Eh/11h Y
Reassign Blocks 07h Y
Receive Diagnostic Results 1Ch Y
Table 10 Supported commands
Command name Command code Supported
Seagate Exos 15E900 SAS Product Manual, Rev. B 51
Supported Diagnostics pages (00h) Y
Translate page (40h) Y
Release 17h Y
Release (10) 57h Y
Report LUNs A0h Y
Report Timestamp A3h Y
Request Sense 03h Y
Actual Retry Count bytes Y
Extended Sense Y
Field Pointer bytes Y
Reserve 16h Y
3rd Party Reserve Y
Extent Reservation N
Reserve (10) 56h Y
3rd Party Reserve Y
Extent Reservation N
Rezero Unit 01h Y
Sanitize 48h Y
Block Erase N
Cryptographic Erase Y (SED only)
Overwrite Y
Sanitize Exit Y
Security Protocol In A2h Y (SED models only)
Security Protocol Out B5h Y (SED models only)
Seek (6) 0Bh Y
Seek (10) 2Bh Y
Send Diagnostics 1Dh Y
Rebuild Assist page (42h) Y
Supported Diagnostics pages (00h) Y
Translate page (40h) Y
Set Timestamp 0Fh Y
Start Unit/Stop Unit (spindle ceases rotating) 1Bh Y
Synchronize Cache 35h Y
Synchronize Cache (16) 91h Y
Test Unit Ready 00h Y
Verify (10) 2Fh Y
BYTCHK bit Y
Verify (12) AFh N
Verify (16) AFh Y
Verify (32) 7Fh/000Ah Y (Type 2 PI only)
Write (6) 0Ah Y
Write (10) 2Ah Y
DPO bit Y
FUA bit Y
Write (12) AAh N
Write (16) 8Ah Y
Write (32) 7Fh/000Bh Y (Type 2 PI only)
Write and Verify (10) 2Eh Y
DPO bit Y
Table 10 Supported commands
Command name Command code Supported
Seagate Exos 15E900 SAS Product Manual, Rev. B 52
[1] Exos 15E900 SAS drives can format to 512, 520, 528 (512 emulation) or 4096, 4160 or 4224 (4096 native).
[2] Warning. Power loss during flash programming can result in firmware corruption.
This usually makes the drive inoperable.
[3] Reference Mode Sense command 1Ah for mode pages supported.
[4] Y = Yes. Command is supported.
N = No. Command is not supported.
A = Support is available on special request.
[5] Approximately 1.5 increase in time to complete this command for a SED drive versus a non-SED drive of the same capacity.
[6] Write alignment counters supported.
[7] Mode Fh is the only activation method supported with mode Eh
Write and Verify (12) AEh N
Write and Verify (16) 8Eh Y
Write and Verify (32) 7Fh/000Ch Y (Type 2 PI only)
Write Buffer (modes 0, 2, supported) 3Bh Y (non-SED drives only)
Write Buffer 3Bh
Firmware Download option (modes 5, 7, Dh and Fh) [7] Y
Write Long (10) 3Fh Y
Write Long (16) 9Fh/11h Y
Write Same (10) [5] 41h Y
PBdata N
LBdata N
Write Same (16) [5] 93h Y
Write Same (32) 7Fh/000Dh Y (Type 2 PI only)
XDRead 52h N
XDWrite 50h N
XPWrite 51h N
Table 10 Supported commands
Command name Command code Supported
Seagate Exos 15E900 SAS Product Manual, Rev. B 53
11.3.1 Inquiry data
The table below lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface
Manual.
Table 11 Exos 15E900 SAS inquiry data
*Copyright year (changes with actual year).
** SCSI Revision support. See the appropriate SPC release documentation for definitions.
PP 10 = Inquiry data for an Inquiry command received on Port A.
30 = Inquiry data for an Inquiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware release number.
S# Eight ASCII digits representing the eight digits of the product serial number.
[ ] Bytes 16 through 26 reflect model of drive. The table above shows the hex values for Model ST900MP0006.
Refer to the values below for the values of bytes 16 through 26 of the particular model:
ST900MP0016 53 54 39 30 30 4D 50 30 30 31 36
ST900MP0026 53 54 39 30 30 4D 50 30 30 32 36
ST900MP0126 53 54 39 30 30 4D 50 30 31 32 36
ST900MP0136 53 54 39 30 30 4D 50 30 31 33 36
ST900MP0146 53 54 39 30 30 4D 50 30 31 34 36
ST900MP0156 53 54 39 30 30 4D 50 30 31 35 36
ST900MP0166 53 54 39 30 30 4D 50 30 31 36 36
ST600MP0006 53 54 36 30 30 4D 50 30 30 30 36
ST600MP0016 53 54 36 30 30 4D 50 30 30 31 36
ST600MP0026 53 54 36 30 30 4D 50 30 30 32 36
ST600MP0036 53 54 36 30 30 4D 50 30 30 33 36
ST600MP0126 53 54 36 30 30 4D 50 30 31 32 36
ST600MP0136 53 54 36 30 30 4D 50 30 31 32 36
ST600MP0146 53 54 36 30 30 4D 50 30 31 34 36
ST600MP0156 53 54 36 30 30 4D 50 30 31 35 36
ST300MP0006 53 54 33 30 30 4D 50 30 30 30 36
ST300MP0016 53 54 33 30 30 4D 50 30 30 31 36
ST300MP0026 53 54 33 30 30 4D 50 30 30 32 36
ST300MP0096 53 54 33 30 30 4D 50 30 30 39 36
ST300MP0106 53 54 33 30 30 4D 50 30 31 30 36
ST300MP0116 53 54 33 30 30 4D 50 30 31 31 36
Bytes Data (hex)
0-15 00 00 xx** 12 8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor ID
16-31 [53 54 39 30 30 4D 50 30 30 30 36] 20 20 20 20 20 Product ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 32* *Copyright
112-127 30* 3x* 3x* 20 53 65 61 67 61 74 65 20 41 6C 6C 20 notice
128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20
Seagate Exos 15E900 SAS Product Manual, Rev. B 54
11.3.2 Mode Sense data
The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The drive maintains four
sets of mode parameters:
1. Default values
Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the drive’s PCB. These default values can
be changed only by downloading a complete set of new firmware into the flash E-PROM. An initiator can request and receive from the drive a
list of default values and use those in a Mode Select command to set up new current and saved values, where the values are changeable.
2. Saved values
Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that are allowed to be changed can be
changed by this method. Parameters in the saved values list that are not changeable by the Mode Select command get their values from
default values storage.
When power is applied to the drive, it takes saved values from the media and stores them as current values in volatile memory. It is not possible
to change the current values (or the saved values) with a Mode Select command before the drive achieves operating speed and is “ready.” An
attempt to do so results in a “Check Condition” status.
On drives requiring unique saved values, the required unique saved values are stored into the saved values storage location on the media prior
to shipping the drive. Some drives may have unique firmware with unique default values also.
On standard OEM drives, the saved values are taken from the default values list and stored into the saved values storage location on the media
prior to shipping.
3. Current values
Current values are volatile values being used by the drive to control its operation. A Mode Select command can be used to change the values
identified as changeable values. Originally, current values are installed from saved or default values after a power on reset, hard reset, or Bus
Device Reset message.
4. Changeable values
Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values and saved values can be changed
by a Mode Select command. A one (1) indicates the value can be changed. A zero (0) indicates the value is not changeable. For example, in
Table 12 refer to Mode page 01, in the row entitled “CHG.” These are hex numbers representing the changeable values for Mode page 01. Note
in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05 none of the bits are changeable. Note also that bytes
06, 07, 09, 10, and 11 are not changeable, because those fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111111. If
there is a zero in any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are ones, all of these bits are
changeable.
The changeable values list can only be changed by downloading new firmware into the flash E-PROM.
The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI
implementation (see the SAS Interface Manual ).
DEF = Default value. Standard OEM drives are shipped configured this way.
CHG = Changeable bits; indicates if default value is changeable.
Note Because there are often several different versions of drive control firmware in the total population of drives in the
field, the Mode Sense values given in the following tables may not exactly match those of some drives.
Seagate Exos 15E900 SAS Product Manual, Rev. B 55
Table 12 Mode Sense data default and changeable values for 300GB drives
BLOCK DESCRIPTOR:
00 00 00 00 22 EC B2 5B 00 00 00 00 00 00 02 00 (512N / 512E)
00 00 00 00 04 5D D8 25 00 00 00 00 00 00 10 00 (4KN)
MODE PAGES:
DEF: 00 0A 00 80 0F 00 00 00 00 00 00 00
CHG: 00 0A B7 C0 8F 00 00 00 00 00 FF FF
DEF: 01 0A C0 14 FF 00 00 00 05 00 FF FF
CHG: 01 0A FF FF 00 00 00 00 FF 00 FF FF
DEF: 02 0E 00 00 00 00 00 00 00 00 00 A0 00 00 00 00
CHG: 02 0E 00 00 FF FF 00 00 FF FF FF FF 00 00 00 00
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 02 00 00 01 01 08 00 2A 40 00 00 00 (512N)
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 10 00 00 01 01 08 00 33 40 00 00 00 (512E / 4KN)
CHG: 03 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 04 16 03 43 28 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A CC 00 00
CHG: 04 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 07 0A 00 14 FF 00 00 00 00 00 FF FF
CHG: 07 0A 0F FF 00 00 00 00 00 00 FF FF
DEF: 08 12 14 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512N)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 30 00 00 00 00 00 00 00 (512N)
DEF: 08 12 10 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512E / 4KN)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 21 00 00 00 00 00 00 00 (512E / 4KN)
DEF: 0A 0A 02 00 00 80 00 00 00 00 7F FF
CHG: 0A 0A 0F F6 00 00 00 00 00 00 00 00
DEF: 18 06 06 00 00 00 00 00
CHG: 18 06 00 00 00 00 00 00
DEF: 19 0E 46 00 07 D0 00 00 00 00 00 00 00 00 00 00
CHG: 19 0E 50 00 FF FF FF FF FF FF 00 00 00 00 00 00
DEF: 1A 26 00 06 00 00 00 0A 00 00 8C A0 00 00 17 70 00 00 46 50 00 00 46 50 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 58
CHG: 1A 26 01 0F FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 FC
DEF: 1C 0A 10 00 00 00 00 00 00 00 00 01
CHG: 1C 0A 9D 0F FF FF FF FF FF FF FF FF
Sub page 01h
DEF: 1C 01 00 0C 01 00 00 48 00 18 01 F4 00 00 00 00
CHG: 1C 01 00 0C 00 00 FF FF FF FF FF FF FF FF 00 00
Seagate Exos 15E900 SAS Product Manual, Rev. B 56
Table 13 Mode Sense data default and changeable values for 600GB drives
BLOCK DESCRIPTOR:
00 00 00 00 45 DD 2F B0 00 00 00 00 00 00 02 00 (512N / 512E)
00 00 00 00 08 BB A5 F6 00 00 00 00 00 00 10 00 (4KN)
MODE PAGES:
DEF: 00 0A 00 80 0F 00 00 00 00 00 00 00
CHG: 00 0A B7 C0 8F 00 00 00 00 00 FF FF
DEF: 01 0A C0 14 FF 00 00 00 05 00 FF FF
CHG: 01 0A FF FF 00 00 00 00 FF 00 FF FF
DEF: 02 0E 00 00 00 00 00 00 00 00 00 A0 00 00 00 00
CHG: 02 0E 00 00 FF FF 00 00 FF FF FF FF 00 00 00 00
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 02 00 00 01 01 08 00 2A 40 00 00 00 (512N)
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 10 00 00 01 01 08 00 33 40 00 00 00 (512E / 4KN)
CHG: 03 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 04 16 03 43 28 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A CC 00 00
CHG: 04 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 07 0A 00 14 FF 00 00 00 00 00 FF FF
CHG: 07 0A 0F FF 00 00 00 00 00 00 FF FF
DEF: 08 12 14 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512N)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 30 00 00 00 00 00 00 00 (512N)
DEF: 08 12 10 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512E / 4KN)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 21 00 00 00 00 00 00 00 (512E / 4KN)
DEF: 0A 0A 02 00 00 80 00 00 00 00 0D 20
CHG: 0A 0A 0F F6 00 00 00 00 00 00 00 00
DEF: 18 06 06 00 00 00 00 00
CHG: 18 06 00 00 00 00 00 00
DEF: 19 0E 46 00 07 D0 00 00 00 00 00 00 00 00 00 00
CHG: 19 0E 50 00 FF FF FF FF FF FF 00 00 00 00 00 00
DEF: 1A 26 00 06 00 00 00 0A 00 00 8C A0 00 00 17 70 00 00 46 50 00 00 46 50 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 58
CHG: 1A 26 01 0F FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 FC
DEF: 1C 0A 10 00 00 00 00 00 00 00 00 01
CHG: 1C 0A 9D 0F FF FF FF FF FF FF FF FF
Sub page 01h
DEF: 1C 01 00 0C 01 00 00 48 00 18 01 F4 00 00 00 00
CHG: 1C 01 00 0C 00 00 FF FF FF FF FF FF FF FF 00 00
Seagate Exos 15E900 SAS Product Manual, Rev. B 57
Table 14 Mode Sense data default and changeable values for 900GB drives
BLOCK DESCRIPTOR:
00 00 00 00 68 CB 9E 30 00 00 00 00 00 00 02 00 (512N / 512E)
00 00 00 00 0D 19 73 C6 00 00 00 00 00 00 10 00 (4KN)
MODE PAGES:
DEF: 00 0A 00 80 0F 00 00 00 00 00 00 00
CHG: 00 0A B7 C0 8F 00 00 00 00 00 FF FF
DEF: 01 0A C0 14 FF 00 00 00 05 00 FF FF
CHG: 01 0A FF FF 00 00 00 00 FF 00 FF FF
DEF: 02 0E 00 00 00 00 00 00 00 00 00 A0 00 00 00 00
CHG: 02 0E 00 00 FF FF 00 00 FF FF FF FF 00 00 00 00
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 02 00 00 01 01 08 00 2A 40 00 00 00 (512N)
DEF: 03 16 BB D0 00 00 00 00 03 80 04 C4 10 00 00 01 01 08 00 33 40 00 00 00 (512E / 4KN)
CHG: 03 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 04 16 03 43 28 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A CC 00 00
CHG: 04 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF: 07 0A 00 14 FF 00 00 00 00 00 FF FF
CHG: 07 0A 0F FF 00 00 00 00 00 00 FF FF
DEF: 08 12 14 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512N)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 30 00 00 00 00 00 00 00 (512N)
DEF: 08 12 10 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00 (512E / 4KN)
CHG: 08 12 A5 00 00 00 FF FF FF FF 00 00 21 00 00 00 00 00 00 00 (512E / 4KN)
DEF: 0A 0A 02 00 00 80 00 00 00 00 7F FF
CHG: 0A 0A 0F F6 00 00 00 00 00 00 00 00
DEF: 18 06 06 00 00 00 00 00
CHG: 18 06 00 00 00 00 00 00
DEF: 19 0E 46 00 07 D0 00 00 00 00 00 00 00 00 00 00
CHG: 19 0E 50 00 FF FF FF FF FF FF 00 00 00 00 00 00
DEF: 1A 26 00 06 00 00 00 0A 00 00 8C A0 00 00 17 70 00 00 46 50 00 00 46 50 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 58
CHG: 1A 26 01 0F FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 FC
DEF: 1C 0A 10 00 00 00 00 00 00 00 00 01
CHG: 1C 0A 9D 0F FF FF FF FF FF FF FF FF
Sub page 01h
DEF: 1C 01 00 0C 01 00 00 48 00 18 01 F4 00 00 00 00
CHG: 1C 01 00 0C 00 00 FF FF FF FF FF FF FF FF 00 00
Seagate Exos 15E900 SAS Product Manual, Rev. B 58
11.4 Miscellaneous operating features and conditions
The table below lists various features and conditions. A “Y” in the support column indicates the feature or condition is supported. An
“N” in the support column indicates the feature or condition is not supported.
11.4.1 SAS physical interface
Figure 15 shows the location of the SAS device connector J1. Figures 16 and 17 provide the dimensions of the SAS connector.
Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate’s SAS
drives are provided in the SAS Interface Manual.
Figure 15. Physical interface
Table 15 Miscellaneous features
Supported Feature or condition
N Automatic contingent allegiance
N Asynchronous event notification
N Synchronized (locked) spindle operation
Y Segmented caching
NZero latency read
Y Queue tagging (up to 128 queue tags supported)
Y Deferred error handling
Y Parameter rounding (controlled by Round bit in Mode Select page 0)
Y Reporting actual retry count in Extended Sense bytes 15, 16, and 17
N Adaptive caching
Y SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes
Table 16 Miscellaneous status
Supported Status
YGood
Y Check condition
N Condition met/good
YBusy
Y Intermediate/good
Y Intermediate/condition met/good
Y Reservation conflict
Y Task set full
NACA active
N ACA active, faulted initiator
Seagate Exos 15E900 SAS Product Manual, Rev. B 59
Figure 16. SAS device plug dimensions
C OF DATUM B
L
5.08
1.27 (6X)
1.27 (14X)
15.875
0.35MIN
15.875
33.43 0.05 B
4.90 0.08
0.84 0.05 (22X)
0.15 B
P15 P1
S7
S1
SEE Detail1
0.30 0.05 (4X)
4.00 0.08
0.15 D
0.30 0.05 (2X)
41.13 0.15
B
BC
CA
A
0.20 B
42.73 REF.
C OF DATUM D
L
1.10
R0.30 0.08 (4X)
2.00 (3X)
5.08
0.45 0.03 (7X)
0.10 M E
4.65
0.80 (6X)
7.625.92
0.52 0.08 x 45
Seagate Exos 15E900 SAS Product Manual, Rev. B 60
Figure 17. SAS device plug dimensions (detail)
6.10
Detail A
0.30 0.05 x 45 (5X)
0.40 0.05 X 45 (3X)
CORING ALLOWED
IN THIS AREA.
2.25 0.05
4.85 0.05
0.10 B
E
S14 S8
4.40 0.15
SEE Detail 2
3.90 0.15
SECTION A - A
SECTION C - C
A
0.35 0.05
45
R0.30 0.08 C
1.95 0.08
0.08 0.05
1.23 0.05
0.08 0.05
Detail 2
CONTACT SURFACE FLUSH
TO DATUM A 0.03
65
30
1.90 0.08
SECTION B - B
2.40 0.08
0.10 A
D
Seagate Exos 15E900 SAS Product Manual, Rev. B 61
11.4.2 Physical characteristics
This section defines physical interface connector.
11.4.3 Connector requirements
Contact a preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a
future revision of this publication when production parts are available from major connector manufacturers.
The SAS device connector is illustrated in Figures 16 and 17.
11.4.4 Electrical description
SAS drives use the device connector for:
• DC power
• SAS interface
• Activity LED
This connector is designed to either plug directly into a backpanel or accept cables.
11.4.5 Pin descriptions
This section provides a pin-out of the SAS device and a description of the functions provided by the pins.
Table 17 SAS pin descriptions
* - Short pin to support hot plugging
** - Power Disable (T10 Industry Standard) for remote management of the end device. Allows power cycling / power saving to be
controlled by the host via interface pin 3.
NC - No connection in the drive.
Pin Signal name Signal type Pin Signal name Signal type
S1 Port A Ground P1* NC (reserved 3.3Volts)
S2* +Port A_in Diff. input pair P2* NC (reserved 3.3Volts)
S3* -Port A_in P3 SAS Power Disable **
S4 Port A Ground P4 Ground
S5* -Port A_out Diff output pair P5 Ground
S6* +Port A_out P6 Ground
S7 Port A Ground P7 5 Volts charge
S8 Port B Ground P8* 5 Volts
S9* +Port B_in Diff. input pair P9* 5 Volts
S10* -Port B_in P10 Ground
S11 Port A Ground P11* Ready LED Open collector out
S12* -Port B_out Diff output pair P12 Ground
S13* +Port B_out P13 12 Volts charge
S14 Port B Ground P14* 12 Volts
P15* 12 Volts
Seagate Exos 15E900 SAS Product Manual, Rev. B 62
11.4.6 SAS transmitters and receivers
A typical SAS differential copper transmitter and receiver pair is shown in Figure 18. The receiver is AC coupling to eliminate ground
shift noise.
Figure 18. SAS transmitters and receivers
11.4.7 Power
The drive receives power (+5 volts and +12 volts) through the SAS device connector.
Three +12 volt pins provide power to the drive, 2 short and 1 long. The current return for the +12 volt power supply is through the
common ground pins. The supply current and return current must be distributed as evenly as possible among the pins.
Three +5 volt pins provide power to the drive, 2 short and 1 long. The current return for the +5 volt power supply is through the
common ground pins. The supply current and return current must be distributed as evenly as possible among the pins.
Current to the drive through the long power pins may be limited by the system to reduce inrush current to the drive during hot
plugging.
11.5 Signal characteristics
This section describes the electrical signal characteristics of the drives input and output signals. See Table 17 for signal type and
signal name information.
11.5.1 Ready LED Out
The Ready LED Out signal is driven by the drive as indicated in Table 18.
Table 18 Ready LED Out conditions
Normal command activity LED status
Ready LED Meaning bit mode page 19h 01
Spun down and no activity Off Off
Spun down and activity (command executing) On On
Spun up and no activity On Off
Spun up and activity (command executing) Off On
Spinning up or down Blinks steadily
(50% on and 50% off, 0.5 seconds on and off for 0.5 seconds)
Format in progress, each cylinder change Toggles on/off
Receiver
Differential
Transfer Medium
.01
.01
100100
Transmitter
RX
RY
TX
TY
Seagate Exos 15E900 SAS Product Manual, Rev. B 63
The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt supply
through an appropriate current limiting resistor. The LED and the current limiting resistor are external to the drive. See Table 19 for
the output characteristics of the LED drive signals.
11.5.2 Differential signals
The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.
Table 20 defines the general interface characteristics.
11.6 SAS-3 Specification compliance
Seagate SAS-3 compatible drives are compliant with the latest SAS-3 Specification (T10/BSR INCITS 519 rev. 06). The main difference
from SAS-2 is the Tx and Rx training that allows the host and drive to adjust the amplitude and emphasis values to the channel. The
receiver still employs Decision Feedback Equalizer (DFE) and Feed Forward Equalizer (FFE) circuitry to accomplish this training.
11.7 Additional information
Please contact the Seagate representative for SAS electrical details, if required.
For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the Seagate SAS Interface
Manual, part number 100293071.
For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI Commands Reference
Manual, part number 100293068.
Table 19 LED drive signal
State Test condition Output voltage
LED off, high 0 V ≤ VOH ≤ 3.6 V -100 μA < IOH < 100 μA
LED on, low IOL = 15 mA 0 ≤ VOL ≤ 0.225 V
Table 20 General interface characteristics
Characteristic Units 3.0 Gbps 6.0 Gbps 12 Gbps
Bit rate (nominal) Mbaud 3000 6000 12000
Unit interval (UI) (nominal) ps 333.3 166.6 83.3
Impedance (nominal, differential ) ohm 100 100 100
Transmitter transients, maximum V ± 1.2 ± 1.2 ± 1.2
Receiver transients, maximum V ± 1.2 ± 1.2 ± 1.2
Seagate Technology LLC
AMERICAS Seagate Technology LLC 10200 South De Anza Boulevard, Cupertino, California 95014, United States, 408-658-1000
ASIA/PACIFIC Seagate Singapore International Headquarters Pte. Ltd. 7000 Ang Mo Kio Avenue 5, Singapore 569877, 65-6485-3888
EUROPE, MIDDLE EAST AND AFRICA Seagate Technology SAS 16-18 rue du Dôme, 92100 Boulogne-Billancourt, France, 33 1-4186 10 00
Publication Number: 100827313, Rev. B
October 2017