Seagate, Seagate Technology and the Spiral logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. 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 certification 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 draft.

Rev. B 10/19/2017 14: Corrected substrate to (glass)

34 & 40: Corrected fastener penetration depth to 0.140 inches in Figure 5 & Section 9.0

Rev. C 12/20/2018 12: Updated Section 2.3.3 Taiwan Requirements - Taiwan RoHS and Table 2 Taiwan - Restricted Substances

17: Updated Sustained transfer rate to 103 to 249MiB/s

Seagate Exos X12 SAS Product Manual, Rev. C 2

Contents

Seagate® Technology Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Agency and Safety Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.2 Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.3 European Union (EU) CE Marking Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.4 Australian RCM Compliance Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.5 Canada ICES-003 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.6 South Korean KC Certification Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.7 Morocco Commodity Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.8 Taiwanese BSMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.9 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.1 European Union Restriction of Hazardous Substance Law. . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.2 China Requirements —China RoHS 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.3 Taiwan Requirements — Taiwan RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.4 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.0 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Standard features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Media description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.5 Formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.6 Programmable drive capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.7 Factory-installed options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1 Internal drive characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1.1 Format command execution time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1.2 Fast Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1.3 General performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.3 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.4 Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Seagate Exos X12 SAS Product Manual, Rev. C 3

Contents

5.0 Reliability specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1.1 Recoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1.2 Unrecoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1.3 Seek errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1.4 Interface errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2 Reliability and service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF) . . . . . . . . . . . . . . 20

5.2.2 Hot plugging the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.2.3 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2.4 Thermal monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2.5 Drive Self Test (DST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2.6 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1 PowerChoiceTM power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1.1 PowerChoice reporting methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 Power Balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.3 AC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.4 DC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.4.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.4.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.4.3 Current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.5 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.6 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.6.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.6.2 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.6.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.6.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.6.5 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.6.6 Air cleanliness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.6.7 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.6.8 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.7 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Seagate Exos X12 SAS Product Manual, Rev. C 4

Contents

7.0 About self-encrypting drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.1 Data encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.2 Controlled access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.2.1 Admin SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.2.2 Locking SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.2.3 Default password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.3 Random number generator (RNG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.4 Drive locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.5 Data bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.6 Cryptographic erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.7 Authenticated firmware download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.8 Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.9 Supported commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.10 Sanitize - CRYPTOGRAPHIC ERASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.11 RevertSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

8.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.2 Drive error recovery procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.3 SAS system errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.4 Deferred Auto-Reallocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.5 Idle Read After Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.6 Protection Information (PI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.6.1 Levels of PI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.6.2 Setting and determining the current Type Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.6.3 Identifying a Protection Information drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.1 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.2 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.4 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Seagate Exos X12 SAS Product Manual, Rev. C 5

Contents

10.0 Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10.1 SAS features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10.1.1 task management functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10.1.2 task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

10.3.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10.3.2 Mode Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

10.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.4.1 SAS physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.4.2 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.4.3 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.4.4 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.4.5 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.4.6 SAS transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

10.4.7 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

10.5 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

10.5.1 Ready LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

10.5.2 Differential signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

10.6 SAS-3 Specification Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

10.7 Additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Seagate Exos X12 SAS Product Manual, Rev. C 6

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 X12 SAS Product Manual, Rev. C 7

1.0 Scope

This manual describes Seagate® Exos™ X12 SAS (Serial Attached SCSI) disk drives.

Exos X12 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.

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 See

“Seagate® Technology Support Services” on page 6.

Unless otherwise stated, the information in this manual applies to standard and Self-Encrypting Drive models.

512E models

Standard Self-Encrypting (SED)

ST12000NM0027 ST12000NM0037

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 X12 SAS Product Manual, Rev. C 8

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 9.3.

2.1 Standards

The Exos X12 family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SAS Interface Manual, part

number 100293071.

The drives are recognized in accordance with UL 60950-1 as tested by UL, CSA 60950-1 as tested by CSA, and EN60950-1 as tested by TUV.

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 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.

2.2.1 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.

2.2.2 Electromagnetic compatibility

The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use. The drive is supplied as a

subassembly and is not subject to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian

Department of Communications.

The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shielding. The drive is

capable of meeting the Class B limits of the FCC Rules and Regulations of the Canadian Department of Communications when properly packaged;

however, it is the user’s responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cables may be

required if the enclosure does not provide adequate shielding. If the I/O cables are external to the enclosure, shielded cables should be used, with

the shields grounded to the enclosure and to the host controller.

2.2.2.1 Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirements. 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 Table 3, DC power requirements.

2.2.3 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), Section 2.3.1 on page 10.

Seagate Exos X12 SAS Product Manual, Rev. C 9

2.2.4 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).

2.2.5 Canada ICES-003

If this model has the ICES-003:2016 marking it complies with requirements of ICES tested per ANSI C63.4-2014.

2.2.6 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.

2.2.7 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.

2.2.8 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, Section 2.3.3 on page 12.

ࣗطیࡈ࢕߇ΰח

% 

ɼࢽࡈ؏ܞݦ࢕ࢢ

ࢇЕɼࢽࡈ%  ࢷ࢕ળࢶଢԻ۰࣯Ի

ɼࢽ߾۰یࡈଜЕʨࡶּࢶࡳԻଜֲ ֻҘ

ࠇ߾۰یࡈଟܹ࢑ݡТЬ

Seagate Exos X12 SAS Product Manual, Rev. C 10

2.2.9 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.

2.3 Environmental protection

Seagate designs its products to meet environmental protection requirements worldwide, including regulations restricting certain

chemical substances.

2.3.1 European Union Restriction of Hazardous Substance Law

2.3.1.1 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).

2.3.1.2 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 X12 SAS Product Manual, Rev. C 11

2.3.2 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.

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.

Seagate Exos X12 SAS Product Manual, Rev. C 12

2.3.3 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.

2.4 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-8323 3.5” Form Factor Drive with Serial Attached Connector

SFF-8482 Serial Attachment 2X Unshielded Connector

INCITS 538 SCSI Protocol Layer-4 (SPL-4)

INCITS 536 Zone Block Commands (ZBC)

INCITS 534 Serial Attached SCSI (SAS-4)

INCITS 506 SCSI Block Commands-4 (SBC-4)

INCITS 502 SCSI Primary Commands-5 (SPC-5)

ANSI Small Computer System Interface (SCSI) Documents

INCITS 515 SCSI Architecture Model (SAM-5)

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.

Table 2 Taiwan - Restricted Substances

設備名稱：硬碟設備，型號 :

Equipment Name: Hard Disk Device, Type Designation:

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)

頂蓋

Top Cover —OOOOO

磁碟

Magnetic disk —OOOOO

電機底座組件

Motor Base Assembly —OOOOO

印刷電路板组装

PCB Assembly —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.

Seagate Exos X12 SAS Product Manual, Rev. C 13

3.0 General description

Exos X12 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.

Exos X12 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. Exos X12

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 users to continue to leverage existing investment in SCSI while gaining a 12Gb/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. Helium recirculates within the HDA through a non-replaceable filter to maintain a

contamination-free HDA environment.

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.

Exos X12 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 product warranty.

Note Seagate recommends validating the configuration with the selected HBA/RAID controller

manufacturer to ensure use of full capacity is supported.

Seagate Exos X12 SAS Product Manual, Rev. C 14

3.1 Standard features

Exos X12 drives have the following standard features:

• 128 - deep task set (queue)

• 256MB data buffer (see Section 4.4).

• 3.0 / 6.0/12.0 Gb Serial Attached SCSI (SAS) interface

• Drive Self Test (DST)

• Embedded servo design

• Firmware downloadable using the SAS interface

• Flawed logical block reallocation at format time

• Idle Read After Write (IRAW)

• Industry standard SFF 3.5-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 (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

•Seagate RAID Rebuild

• 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 Section 4.1.2)

• User-selectable logical block sizes for 4096 native models (4096, 4160 or 4224 bytes per logical block)

• User-selectable logical block sizes for 512E (512, 520, 524 or 528 bytes per logical block).

• Vertical, horizontal, or top down mounting

Seagate Exos X12 SAS Self-Encrypting Drive models have the following additional features:

• 32 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.

3.3 Performance

• 1200MB/s maximum instantaneous data transfers.

• 7200 RPM spindle. Average latency = 4.16ms

• Adaptive seek velocity; improved seek performance

• Background processing of queue

• Programmable multi-segmentable cache buffer

• Supports start and stop commands (spindle stops spinning)

3.4 Reliability

• 5-year warranty

• Annualized Failure Rate (AFR) of 0.35%

• 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 2,500,000 hours

Note There is no significant performance difference between Self-Encrypting

Drive and standard (non-Self-Encrypting Drive) models.

Seagate Exos X12 SAS Product Manual, Rev. C 15

3.5 Formatted capacities

Standard OEM models are formatted to 512 bytes per block for 512 emulation drives and 4096 bytes per block for 4096 native drives. The block size

is selectable at format time. Supported block sizes are 512, 520, 524, and 528 for 512 emulation drives and 4096, 4160, 4192, and 4224 for 4096

native drives. 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 specify 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 shown below.

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

Users 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 cop-

ies may be ordered.

Sector

Size

12TB with PI bytes 12TB w/o PI bytes

Decimal Hex Decimal Hex

512 22,961,717,248 558A00000 23,437,770,752 575000000

520 22,613,590,016 543E00000 22,961,717,248 558A00000

524 22,443,720,704 539C00000 22,785,556,480 54E200000

528 22,275,948,544 52FC00000 22,613,590,016 543E00000

4096 2,909,274,112 AD680000 2,929,721,344 AEA00000

4160 2,864,709,632 AAC00000 2,870,214,656 AB140000

4192 2,842,689,536 A9700000 2,848,194,560 A9C40000

4224 2,821,193,728 A8280000 2,826,698,752 A87C0000

Note LBA Counts for drive capacities greater than 8TB are calculated based upon

the SFF-8447 standard publication. ftp://ftp.seagate.com/sff/SFF-8447.PDF

Seagate Exos X12 SAS Product Manual, Rev. C 16

4.0 Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Exos X12 drives.

4.1 Internal drive characteristics

Drive capacity 12TB models (formatted, rounded off value)

Read/write data heads 16

Bytes/track 2,265,088 Bytes (average, rounded off values)

Bytes/surface 714,500 MB (unformatted, rounded off values)

Tracks/surface (total) 395,250 Tracks (user accessible)

Tracks/in 392,000 TPI (average)

Peak bits/in 2,283,000 BPI

Areal density 923 Gb/in2

Internal data rate 2685 Mb/s (max)

Disk rotation speed 7200 RPM

Avg rotational latency 4.16 ms

4.1.1 Format command execution time

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.

4.1.2 Fast Format

Drive sector size transition

• Single code to support sector sizes from 512E

• T10 fast format conversion between 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 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)

• 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)

5xxE-byte sectors (minutes) 12TB models

Maximum (with verify) 1983

Maximum (without verify) 995

Seagate Exos X12 SAS Product Manual, Rev. C 17

4.1.3 General performance characteristics

4.2 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 30 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 30 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 23 seconds (maximum) from removal of DC

power. SCSI stop time is 23 seconds. There is no power control switch on the drive.

4.3 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 4.4.1 and 4.4.2.

All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 9.

Minimum sector interleave 1 to 1

Maximum Internal data rate* 2.7 Gb/s

Sustained transfer rate 103 to 249 MiB/s **

SAS Interface maximum instantaneous transfer rate 1200MB/s* per port

(dual port = 2400MB/s*)

Logical block sizes

512 (default), 520, 524 or 528.

4096, 4160, 4192 or 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 4.16ms

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the

host.

** MiB/s x 1.048 = MB/s

Seagate Exos X12 SAS Product Manual, Rev. C 18

4.4 Cache operation

The buffer is divided into logical segments from which data is read and to which data is written.

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.

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 4.4.2 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.

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.

4.4.1 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. Table 9 shows the mode default settings

for the drive.

4.4.2 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.

Note Refer to the SAS Interface Manual for more detail concerning the cache bits.

Seagate Exos X12 SAS Product Manual, Rev. C 19

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 correction, although ECC on-the-fly is not considered for purposes of recovered error specifications.

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 1015 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): 2,500,000 hours

Annualized Failure Rate (AFR): 0.35%

Preventive maintenance: None required

Seagate Exos X12 SAS Product Manual, Rev. C 20

5.2 Reliability and service

Users can enhance the reliability of Exos X12 disk drives 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 9.2 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 0.35% (MTBF of 2,500,000 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 <= 30°C

• Ambient wet bulb temp <= 26°C

• Typical workload

• 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.

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 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.

It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard, 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.

Nonrecoverable read errors 1 per 1015 bits read, max

Load unload cycles 600,000 cycles

Maximum Rated Workload Maximum rate of <550TB/year

Workloads exceeding the annualized rate may degrade the drive MTBF and impact product

reliability. The Annualized Workload Rate is in units of TB per year, or TB per 8760 power on

hours. Workload Rate = TB transferred * (8760 / recorded power on hours).

Warranty To determine the warranty for a specific drive, use a web browser to access the following web

page: http://www.seagate.com/support/warranty-and-replacements/.

From this page, click on the “Is my Drive under Warranty” link. The following are required to be

provided: the drive serial number, model number (or part number) and country of purchase.

The system will display the warranty information for the drive.

Preventive maintenance None required.

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.

Seagate Exos X12 SAS Product Manual, Rev. C 21

5.2.3 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 users 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.

Users 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.

Users 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 the user to control when S.M.A.R.T. interruptions occur.

Forcing S.M.A.R.T. with the RTZ command resets the timer.

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 one 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). An 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.

Note The drive’s firmware monitors specific attributes for degradation

over time but can’t predict instantaneous drive failures.

Maximum processing delay

Fully-enabled delay

DEXCPT = 0

S.M.A.R.T. delay times 75 ms

Seagate Exos X12 SAS Product Manual, Rev. C 22

5.2.4 Thermal monitor

Exos X12 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).

5.2.5 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.

5.2.5.1 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.

Seagate Exos X12 SAS Product Manual, Rev. C 23

5.2.5.2 Implementation

This section provides all of the information necessary to implement the DST function on this drive.

5.2.5.2.1 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.

5.2.5.2.2 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.

5.2.5.2.3 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.

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.

Seagate Exos X12 SAS Product Manual, Rev. C 24

5.2.5.2.4 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.

5.2.5.2.5 Abort

There are several ways to abort a diagnostic. Users can use a SCSI Bus Reset or a Bus Device Reset message to abort the diagnostic.

Users can abort a DST executing in background mode by using 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).

5.2.6 Product warranty

See “Seagate® Technology Support Services” on page 6 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.

Storage

Maximum storage periods are 180 days within original unopened Seagate shipping package or 60 days unpackaged within the defined non-

operating limits (refer to environmental section in this manual). Storage can be extended to 1 year packaged or unpackaged under optimal

environmental conditions (25°C, <40% relative humidity non-condensing, and non-corrosive environment). During any storage period the drive

non-operational temperature, humidity, wet bulb, atmospheric conditions, shock, vibration, magnetic and electrical field specifications should be

followed.

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.

Seagate Exos X12 SAS Product Manual, Rev. C 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 the user goes in the table, the more power savings the user gets. 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

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

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.

Note Processing the Request Sense command does not impact the drive’s power save state.

Seagate Exos X12 SAS Product Manual, Rev. C 26

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.

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 3 12TB drive DC power requirements

Notes

12.0Gb mode

(Amps) (Amps) (Watts)

Voltage +5V +12V [2]

Regulation [5] ± 5% ± 10% [2]

Avg idle current DCX [1] [6] 0.309 0.292 5.05

Advanced idle current

Idle A 0.31 0.289 5.02

Idle B 0.241 0.186 3.43

Idle C 0.238 0.124 2.68

Standby 0.23 0.00 1.15

Maximum starting current

(peak DC) DC [3] 0.914 1.729

(peak AC) AC [3] 1.344 2.58

Peak operating current (random read 4K16Q)

Typical DCX [1] 0.499 0.639 10.16

Maximum DC [1] 0.503 0.656 10.39

Maximum (peak) DC 1.533 2.226

Peak operating current (random write 4K16Q)

Typical DCX [1] 0.382 0.349 6.1

Maximum DC [1] 0.386 0.359 6.24

Maximum (peak) DC 0.974 2.147

Peak operating current (sequential read 64K16Q)

Typical DCX [1] 0.898 0.319 8.32

Maximum DC [1] 0.914 0.326 8.48

Maximum (peak) DC 1.274 1.138

Peak operating current (sequential write 64K16Q)

Typical DCX [1] 0.741 0.32 7.54

Maximum DC [1] 0.758 0.325 7.7

Maximum (peak) DC 0.99 1.824

Seagate Exos X12 SAS Product Manual, Rev. C 27

[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 ± 10% before reaching 7200 RPM. The ± 10% must be

maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host

initiator.

[3] See +12V current profile in Figure 1. (for 12TB models)

[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] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.

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. No terminator power.

6.4.1 Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. 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.

+5v = 250 mV pp from 100 Hz to 20 MHz.

+12v = 800 mV pp from 100 Hz to 8 KHz.

450 mV pp from 8 KHz to 20 KHz.

250 mV pp from 20 KHz to 5 MHz.

Seagate Exos X12 SAS Product Manual, Rev. C 28

6.4.3 Current profiles

The +12V (top) and +5V (bottom) current profiles for the Exos X12 drives are shown below.

Figure 1. 12TB model current profiles.

Note All times and currents are typical. See Table 3 for maximum current requirements.

Seagate Exos X12 SAS Product Manual, Rev. C 29

6.5 Power dissipation

12TB models in 12Gb operation

Please refer to Table 3 for power dissipation numbers.

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 2.). 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 2. 12TB models (12Gb) DC current and power vs. input/output operations per second

Seagate Exos X12 SAS Product Manual, Rev. C 30

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

The drive meets the operating specifications over a 41°F to 140°F (5°C to 60°C) drive case temperature range with a maximum

temperature gradient of 36°F (20°C) per hour.

The maximum allowable drive case temperature is 140°F (60°C).

Air flow may be required to achieve consistent nominal case 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, measure the case temperature of the drive. See Figure 3 for HDA case

temperature measurement location.

b. 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.

Figure 3. Location of the HDA temperature check point

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.

6.6.3 Effective altitude (sea level)

a. Operating

–1000 to +10,000 feet (–304.8 to +3048 meters)

b. Non-operating

–1000 to +40,000 feet (–304.8 to +12,192 meters)

Note To maintain optimal performance drives should be run at nominal drive temperatures and humidity

Note Image is for reference only, may not represent actual drive.

HDA

Temperature

Check Point

Seagate Exos X12 SAS Product Manual, Rev. C 31

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 4,

and in accordance with the restrictions of Section 9.3.

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 70 Gs

(read) and 40 Gs (write) typical at a maximum duration of 2ms (half sinewave). Shock may be applied in the X, Y, or Z axis. Shock is

not to be repeated more than once every 2 seconds.

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 11ms (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 once every 2

seconds.

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 typical at a maximum duration of 11ms (half sinewave) shall not

exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

The drive subjected to nonrepetitive shock not exceeding 250 Gs typical at a maximum duration of 2ms (half sinewave) does not

exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

The drive subjected to nonrepetitive shock not exceeding 150 Gs typical at a maximum duration of 0.5ms (half sinewave) does

not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

d. Packaged

Disk drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in

the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/

45 Kg).

Seagate Exos X12 SAS Product Manual, Rev. C 32

Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for general freight

shipment shall withstand a drop test from 48 in (1070 mm) against a concrete floor or equivalent.

Figure 4. Recommended mounting

Package size Packaged/product weight Drop height

<600 cu in (<9,800 cu cm) Any 60 in (1524 mm)

600-1800 cu in (9,800-19,700 cu cm) 0-20 lb (0 to 9.1 kg) 48 in (1219 mm)

>1800 cu in (>19,700 cu cm) 0-20 lb (0 to 9.1 kg) 42 in (1067 mm)

>600 cu in (>9,800 cu cm) 20-40 lb (9.1 to 18.1 kg) 36 in (914 mm)

Note Image is for reference only, may not represent actual drive.

Seagate Exos X12 SAS Product Manual, Rev. C 33

6.6.4.2 Vibration

a. Operating—normal

The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous

vibration not exceeding

5 - 22 Hz 0.25 Gs, limited displacement

22 - 350 Hz 0.5 Gs

350 - 500 Hz 0.25 Gs

Vibration may be applied in the X, Y, or Z axis.

b. Operating—abnormal

Equipment as installed for normal operation shall not incur physical damage while subjected to periodic vibration not exceeding:

15 minutes of duration at major resonant frequency

Vibration occurring at these levels may degrade operational performance during the abnormal vibration period. Specified

operational performance will continue when normal operating vibration levels are resumed. This assumes system recovery

routines are available.

Operating abnormal translational random flat profile

5-500 Hz @ 0.75 G (X, Y, or Z axis)

c. Non-operating

The limits of non-operating vibration shall apply to all conditions of handling and transportation. This includes both isolated

drives and integrated drives.

The drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding.

Vibration may be applied in the X, Y, or Z axis.

6.6.5 Acoustics

Sound power during idle mode shall be 2.8 bels typical when measured to ISO 7779 specification.

Sound power while operating shall be 3.0 bels typical when measured to ISO 7779 specification.

There will not be any discrete tones more than 9 dB above the masking noise when measured according to

Seagate specification 30553-001.

6.6.6 Air cleanliness

The drive is designed to operate in a typical office environment with minimal environmental control.

6.6.7 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 hard disk drives are especially

sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging. 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.

Seagate recommends that data centers be kept clean by monitoring and controlling the dust and gaseous contamination. Gaseous contamination

should be within ANSI/ISA S71.04-2013 G2 classification levels (as measured on copper and silver coupons), and dust contamination to ISO 14644-1

Class 8 standards, and MTBF rated conditions as defined in the Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF) section.

2–500 Hz

Linear Random 2.27 Grms ref

Freq (Hz) 2 4 100 500

G2/Hz .001 .03 .03 .001

Seagate Exos X12 SAS Product Manual, Rev. C 34

6.6.8 Electromagnetic susceptibility

See Section 2.2.2.1.

6.7 Mechanical specifications

Refer to Figure 5 for detailed mounting configuration dimensions. See Section 9.3, “Drive mounting.”

Figure 5. Mounting configuration dimensions

Weight: 1.554 lb 705 g

Note These dimensions conform to the Small Form Factor Standard documented

in SFF-8301 and SFF-8323, found at www.sffcommittee.org.

Note The image is for mechanical dimension reference only and may not represent the actual drive.

2X 1.625±.020

2X 3.000±.010

1.432

.134±.010

3.741±.010

4.000±.010

.814

2.000

4X 6-32 UNC 2B

3 MIN THREAD DEPTH

.1 MAX FASTENER PENETRATION

MOUNTING HOLE.

MAX TORQUE 6 IN/LBS

.250±.010

5.787 MAX

146.56 MM

1.122±.020

4.000±.010

2X 6-32 UNC 2B

3 MIN THREAD DEPTH

.1 MAX FASTENER PENETRATION

MOUNTING HOLES BOTH SIDES.

MAX TORQUE 6 IN/LBS

1.028 MAX

26.11MM

.138±.015

2.000

LOF DRIVE

OF CONN

Seagate Exos X12 SAS Product Manual, Rev. C 35

7.0 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 2.4.

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.

7.1 Data encryption

Encrypting drives use one inline encryption engine for each port, employing AES-256 bit data encryption in AES-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 drive's possible 32 data bands (see Section 7.5).

7.2 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.

7.2.1 Admin SP

The Admin SP allows the drive's owner to enable or disable firmware download operations (see Section 7.4). Access to the Admin SP is available

using the SID (Secure ID) password or the MSID (Manufacturers Secure ID) password.

7.2.2 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).

7.2.3 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.

7.3 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.

7.4 Drive locking

In addition to changing the passwords, as described in Section 7.2.3, 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 X12 SAS Product Manual, Rev. C 36

7.5 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 7.6) or the password when required. The bands should be aligned to 4K LBA boundaries.

7.6 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.

7.7 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.

7.8 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 30mA and a commensurate

increase of about 150mW 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.

7.9 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

Table 7:

• Security Protocol Out (B5h)

• Security Protocol In (A2h)

7.10 Sanitize - CRYPTOGRAPHIC ERASE

This command cryptographically erases all user data on the drive by destroying the current data encryption key and replacing it with a new data

encryption key randomly generated by the drive. Sanitize CRYPTOGRAPHIC ERASE is a SCSI CDB Op code 48h and selecting the service action code

3 (CRYPTOGRAPHIC ERASE)

7.11 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.

Seagate Exos X12 SAS Product Manual, Rev. C 37

8.0 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 8.4)

• Idle Read After Write (see Section 8.5)

The read error rates and specified storage capacities are not dependent on host (initiator) defect management routines.

8.1 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.

8.2 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 consist of 12 levels for read recoveries and five 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.

Table 4 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 X12 SAS Product Manual, Rev. C 38

* 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 621.62 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

621.62 ms), the command will end with Check Condition status report and unrecoverable read error will be reported.

8.3 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.

8.4 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.

8.5 Idle Read After Write

Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive

reads recently written data from the media and compares it to valid write command data resident in the drives data buffer. Any sectors that fail the

comparison result in the invocation of a rewrite and auto-reallocation process. The process 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.

Table 4 Read and write retry count maximum recovery time

Read retry count* Maximum recovery time per

LBA (cumulative, ms) Write retry count Maximum recovery time per

LBA (cumulative, ms)

0 35.94

1 124.32 1 53.91

5 621.62 2 79.89

10 1243.23 3 97.86

15 1864.85 4 175.85

20 (default) 2486.47 5 (default) 421.79

Seagate Exos X12 SAS Product Manual, Rev. C 39

8.6 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.

8.6.1 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.

8.6.2 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

8.6.3 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.

Note For further details with respect to PI, please refer to SCSI Block

Commands - 3 (SBC-3) Draft Standard documentation.

Seagate Exos X12 SAS Product Manual, Rev. C 40

9.0 Installation

Exos X12 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 users need to mount the drive. Mount the drive to the carrier or tray

provided by the host system only using 6-32 UNC mounting screws. The screws should be inserted no more than 0.140 in (3.56mm) into the bottom

or side mounting holes. When tightening the screws, do not overtighten use a maximum torque of 6 in-lb. Users can 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 10.4.1 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. Users need to reformat the drive only if selecting a different

logical block size.

Figure 6. Physical interface

9.1 Drive orientation

The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the drive in horizontal (discs

level) and vertical (drive on its side) orientations, which are the two preferred mounting orientations.

Note

SAS drives are designed to be attached to the host system without I/O or power cables. If users intend the

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 4 meters (13.1 feet).

Note Image is for reference only, may not represent actual drive.

Seagate Exos X12 SAS Product Manual, Rev. C 41

9.2 Cooling

Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed

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). Users

should 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.

If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 7. 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 7. Air flow

9.3 Drive mounting

Mount the drive using the bottom or side mounting holes. If mounting the drive using the bottom holes, ensure the drive is not physically distorted

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.

9.4 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 users do not provide the maximum surface area ground connection between system ground and drive

ground. This is the system designer’s and integrator’s responsibility.

Note Image is for reference only, may not represent actual drive.

Above unit

Under unit

Note. Air flows in the direction shown (back to front)

or in reverse direction (front to back)

Above unit

Under unit

Note. Air flows in the direction shown or

in reverse direction (side to side)

K x X = F < 15lb = 67N

Seagate Exos X12 SAS Product Manual, Rev. C 42

10.0 Interface requirements

This section partially describes the interface requirements as implemented on Exos X12 drives. Additional information is provided in the SAS

Interface Manual (part number 100293071).

10.1 SAS features

This section lists the SAS-specific features supported by Exos X12 drives.

10.1.1 task management functions

Table 5 lists the SAS task management functions supported.

10.1.2 task management responses

Table 6 lists the SAS response codes returned for task management functions supported.

10.2 Dual port support

Exos X12 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 X12 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 5 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 6 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 X12 SAS Product Manual, Rev. C 43

10.3 SCSI commands supported

Table 7 lists the SCSI commands supported by Exos X12 drives.

Table 7 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 (B1h) Y

Block Limits (B0h) Y

Date Code page (C1h) Y

Device Behavior page (C3h) Y

Device Identification (83h) Y

Extended Inquiry Data (86h) Y

Firmware Numbers page (C0h) Y

Implemented Operating Def page (81h) Y

Jumper Settings page (C2h) Y

Logical Block Provisioning (B2h) Y

Mode Page Policy (87h) Y

Power Condition (8Ah) Y

Protocol Specific Logical Unit Information (90h) Y

Protocol Specific Port Information (91h) Y

SCSI Ports (88h) Y

Supported Vital Product Data page (00h) Y

Unit Serial Number page (80h) Y

Lock-unlock cache 36h N

Log Select 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

Background Scan Results page (15h) (SBC-3) Y

Seagate Exos X12 SAS Product Manual, Rev. C 44

Buffer Over-run/Under-run page (01h) N

Cache Statistics page (37h) Y

Factory Log page (3Eh) Y

Format Status page (08h) Y

Information Exceptions Log page (2Fh) Y

Last n Deferred Errors or Asynchronous Events page (0Bh) N

Last n Error Events page (07h) N

Non-medium Error page (06h) Y

Pages Supported list (00h) Y

Power Condition Transition page (1Ah) Y

Protocol Specific Port page (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) Y

Mode Select (same pages as Mode Sense 1Ah) 15h Y [2]

Mode Select (10) (same pages as Mode Sense 1Ah) 55h Y

Mode Sense 1Ah Y [2]

Caching Parameters page (08h) Y

Control Mode page (0Ah) Y

Disconnect/Reconnect (02h) Y

Error Recovery page (01h) Y

Format page (03h) Y

Information Exceptions Control page (1Ch/01h) 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) 5Ah Y

Persistent Reserve In 5Eh Y

Persistent Reserve Out 5Fh Y

Prefetch (10) 34h N

Prefetch (16) 90h N.A.

Read (6) 08h Y

Read (10) 28h Y

DPO bit supported Y

FUA bit supported Y

Read (12) A8h N

Read (16) 88h Y

Table 7 Supported commands

Command name Command code Supported

Seagate Exos X12 SAS Product Manual, Rev. C 45

Read (32) 7Fh/0009h Y

Read Buffer (modes 0, 1c, 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

Supported Diagnostics pages (00h) Y

Translate page (40h) Y

Release 17h Y

Release (10) 57h Y

Report Identifying Information A3h/05h Y

Report LUNs A0h Y

Report Supported Operation Codes A3h/0Ch Y

Report Supported Task Management Functions A3h/0Dh Y

Report Timestamp A3h/0Fh 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

Search Data Equal 31h N

Search Data High 30h N

Search Data Low 32h N

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

Supported Diagnostics pages (00h) Y

Translate page (40h) Y

Set Identifying Information A4h/06h Y

Table 7 Supported commands

Command name Command code Supported

Seagate Exos X12 SAS Product Manual, Rev. C 46

[1] Exos X12 drives can format to 512, 520 or 528 bytes per logical block.

[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.

Set Limits 33h N

Set Timestamp A4h/12h 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 (10) 2Fh Y

Verify (12) AFh N

Verify (16) 8Fh Y

Verify (32) 7Fh/000Ah N (Supported if formatted for

type 2 protection information)

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 N (Supported if formatted for

type 2 protection information)

Write and Verify (10) 2Eh Y

DPO bit Y

Write and Verify (12) AEh N

Write and Verify (16) 8Eh Y

Write and Verify (32) 7Fh/000Ch N (Supported if formatted for

type 2 protection information)

Write Buffer (modes 0, 1A, 1C, 2, 6, D, E, F supported) 3Bh Y (non-SED drives only)

Firmware Download option (modes 5, 7, Ah and Bh) [3] Y (non-SED drives only)

Firmware Download option (modes 4, 5, 7) Y (SED drives only)

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

XDRead 52h N

XDWrite 50h N

XPWrite 51h N

Table 7 Supported commands

Command name Command code Supported

Seagate Exos X12 SAS Product Manual, Rev. C 47

10.3.1 Inquiry data

Table 8 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual.

Table 8 Exos X12 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 ST12000NM0027.

Refer to the values below for the values of bytes 16 through 26 of a particular model:

ST12000NM0037 53 54 31 32 30 30 30 4E 4D 30 30 33 37

Bytes Data (hex)

0-15 00 00 xx** 12 8B 00 30 02 53 45 41 47 41 54 45 20 Vendor ID

16-31 [53 54 31 32 30 30 30 4E 4D 30 30 32 37) 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* 31* 37* 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 X12 SAS Product Manual, Rev. C 48

10.3.2 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 com-

mand 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 operat-

ing 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 9, refer to Mode page 81, in the row entitled “CHG.” These are hex numbers representing the

changeable values for Mode page 81. 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 X12 SAS Product Manual, Rev. C 49

Table 9 Mode Sense data changeable and default values for 12TB drives

Block Descriptor:

00 00 00 05 75 00 00 00 00 00 00 00 00 00 02 00 (512E)

Mode Pages:

Seagate Specific Unit Attention Parameters (00h)

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

Read-Write Error Recovery (01h)

DEF 01 0A C0 14 FF 00 00 00 05 00 FF FF

CHG 01 0A EF FF 00 00 00 00 FF 00 FF FF

Disconnect-Reconnect (02h)

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

Format Parameters (03h)

DEF 03 16 00 01 00 00 00 00 00 02 00 03 10 00 00 01 00 00 00 00 40 00 00 00

CHG 03 16 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Rigid Drive Geometry parameters (04h)

DEF 04 16 07 14 4D 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 20 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

Verify Error Recovery (07h)

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

Caching (08h)

DEF 08 12 14 00 FF FF 00 00 FF FF FF FF 90 20 00 00 00 00 00 00

CHG 08 12 A5 00 00 00 FF FF FF FF 00 00 20 00 00 00 00 00 00 00

Control (0Ah)

DEF 0A 0A 06 00 00 80 00 00 00 00 FF FF

CHG 0A 0A 0F F6 00 10 00 00 00 00 00 00

Protocol Specific Logical Unit (18h)

DEF 18 06 06 00 00 00 00 00

CHG 18 06 00 00 00 00 00 00

Protocol Specific Ports (19h)

DEF 19 0E 46 00 07 D0 07 D0 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

Power Condition (1Ah)

DEF 1A 26 00 06 00 00 00 01 00 00 23 28 00 00 04 B0 00 00 17 70 00 00 17 70 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

Information Exceptions Control (1Ch)

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

Seagate Exos X12 SAS Product Manual, Rev. C 50

10.4 Miscellaneous operating features and conditions

Table 10 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.

10.4.1 SAS physical interface

Figure 8 shows the location of the SAS device connector J1. Figures 9 and 10 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 8. Physical interface

Table 10 Miscellaneous features

Supported Feature or condition

N Automatic contingent allegiance

N Asynchronous event notification

N Synchronized (locked) spindle operation

Y Segmented caching

N Zero latency read

Y Queue tagging (up to 64 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 11 Miscellaneous status

Supported Status

YGood

Y Check condition

Y Condition met/good

YBusy

YIntermediate/good

Y Intermediate/condition met/good

Y Reservation conflict

YTask set full

NACA active

N ACA active, faulted initiator

Seagate Exos X12 SAS Product Manual, Rev. C 51

Figure 9. SAS device plug dimensions

C OF DATUM B

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

SEE Detail1

0.30 0.05 (4X)

4.00 0.08

0.15 D

0.30 0.05 (2X)

41.13 0.15

0.20 B

42.73 REF.

C OF DATUM D

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 X12 SAS Product Manual, Rev. C 52

Figure 10. 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

S14 S8

4.40 0.15

SEE Detail 2

3.90 0.15

SECTION A - A

SECTION C - C

0.35 0.05

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

1.90 0.08

SECTION B - B

2.40 0.08

0.10 A

Seagate Exos X12 SAS Product Manual, Rev. C 53

10.4.2 Physical characteristics

This section defines physical interface connector.

10.4.3 Connector requirements

Contact the 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 9 and 10.

10.4.4 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.

10.4.5 Pin descriptions

This section provides a pin-out of the SAS device and a description of the functions provided by the pins.

Table 12 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.

†P1 & P2 tied for visible host detection.

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 X12 SAS Product Manual, Rev. C 54

10.4.6 SAS transmitters and receivers

A typical SAS differential copper transmitter and receiver pair is shown in Figure 11. The receiver is AC coupling to eliminate ground shift noise.

Figure 11. SAS transmitters and receivers

10.4.7 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.

10.5 Signal characteristics

This section describes the electrical signal characteristics of the drive’s input and output signals. See Table 12 for signal type and signal name

information.

10.5.1 Ready LED Out

The Ready LED Out signal is driven by the drive as indicated in Table 13.

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 14 for the output characteristics of

the LED drive signals.

Table 13 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

100100

Transmitter

Seagate Exos X12 SAS Product Manual, Rev. C 55

10.5.2 Differential signals

The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.

Table 15 defines the general interface characteristics.

10.6 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.

1. A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-2 training pattern transmitted during the SNW-3 training gap. The DFE cir-

cuit can derive an optimal equalization characteristic to compensate for many of the receive losses in the system.

2. A Feed Forward Equalizer (FFE) optimized to provide balanced receive margins over a range of channels bounded by the best and worst case

channels as defined by the relevant ANSI standard.

10.7 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 Commanrds Reference Manual, part number

100293068.

Table 14 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 15 General interface characteristics

Characteristic Units 1.5Gb/s 3.0Gb/s 6.0Gb/s 12 Gbps

Bit rate (nominal) Mbaud 1,500 3,000 6,000 12000

Unit interval (UI) (nominal) ps 666.6 333.3 166.6 83.3

Impedance (nominal, differential) ohm 100 100 100 100

Transmitter transients, maximum V ± 1.2 ± 1.2 ± 1.2 ± 1.2

Receiver transients, maximum V ± 1.2 ± 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: 100828039, Rev. C

December 2018

Table of Contents

Seagate ST12000NM0037 User Manual

Related Manuals