Table of Contents
QNAP TS-451DeU User Manual
Displayed below is the user manual for TS-451DeU by QNAP which is a product in the NAS & Storage Servers category. This manual has pages.
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TS-451DeU
User Guide
Document Version: 1
06/05/2020
Contents
1. Preface
About This Guide.......................................................................................................................................... 3
Audience.......................................................................................................................................................3
Document Conventions................................................................................................................................ 3
2. Product Overview
About the TS-451DeU.................................................................................................................................. 4
Hardware Specifications............................................................................................................................... 4
Package Contents........................................................................................................................................ 6
Components................................................................................................................................................. 6
Front Panel...............................................................................................................................................6
Rear Panel................................................................................................................................................7
System Board...........................................................................................................................................7
Drive Numbering.......................................................................................................................................8
Installation Requirements............................................................................................................................. 8
Safety Information.........................................................................................................................................8
Setting Up the NAS.......................................................................................................................................9
3. Installation and Configuration
Hardware Installation.................................................................................................................................. 11
Removing the Case Cover......................................................................................................................11
Attaching the Case Cover.......................................................................................................................12
Drive Installation.....................................................................................................................................14
Replacing Memory Modules...................................................................................................................23
Connecting USB Expansion Units..........................................................................................................25
Installing Handles................................................................................................................................... 26
Rail Kits.................................................................................................................................................. 28
QTS Installation.......................................................................................................................................... 28
Installing QTS Using Qfinder Pro........................................................................................................... 28
Installing QTS Using the Cloud Key....................................................................................................... 29
4. Basic Operations
Power Button.............................................................................................................................................. 32
Reset Button............................................................................................................................................... 32
LEDs........................................................................................................................................................... 33
Audio Alert.................................................................................................................................................. 35
5. Troubleshooting
Forcing Qfinder Pro or myQNAPcloud to Locate the NAS......................................................................... 36
Hot-swapping Failed Drives........................................................................................................................36
Recovering Unintentionally Removed Healthy Drives................................................................................ 36
Support and Other Resources.................................................................................................................... 37
6. Glossary
CloudKey.................................................................................................................................................... 38
myQNAPcloud Link.....................................................................................................................................38
myQNAPcloud............................................................................................................................................ 38
myQNAPcloud ID........................................................................................................................................38
Qfinder Pro................................................................................................................................................. 38
QTS.............................................................................................................................................................38
TS-451DeU User Guide
1
7. Notices
Limited Warranty.........................................................................................................................................39
Disclaimer................................................................................................................................................... 39
GNU Public License....................................................................................................................................39
CE Notice....................................................................................................................................................47
FCC Notice................................................................................................................................................. 47
VCCI Notice................................................................................................................................................ 47
BSMI Notice................................................................................................................................................48
SJ/T 11364-2006.........................................................................................................................................48
2
1. Preface
About This Guide
This guide provides information on the QNAP TS-451DeU NAS and step-by-step instructions on installing
the hardware. It also provides instructions on basic operations and troubleshooting information.
Audience
This document is intended for consumers and storage administrators. This guide assumes that the user has
a basic understanding of storage and backup concepts.
Document Conventions
Symbol Description
Notes provide default configuration settings and other supplementary
information.
Important notes provide information on required configuration settings and other
critical information.
Tips provide recommendations or alternative methods of performing tasks or
configuring settings.
Warnings provide information that, when ignored, may result in potential loss,
injury, or even death.
TS-451DeU User Guide
Preface 3
2. Product Overview
This chapter provides basic information about the QNAP TS-451DeU NAS.
About the TS-451DeU
The TS-451DeU is powered by an Intel® Celeron® J4025 dual-core 2.0 GHz processor, AES-NI hardware
encryption engine, and supports up to 8 GB of DDR4 memory. The NAS features two M.2 2280 SATA 6
Gbps SSD slots and provides four hot-swappable SATA 6 Gbps drive bays to support both hard disk drives
and solid-state drives. The TS-451DeU also includes two USB 2.0 ports and two USB 3.2 Gen 1 ports.
Hardware Specifications
Tip
Model specifications are subject to change without prior notice. To see the latest
specifications, go to https://www.qnap.com.
Component TS-451DeU-2G
Processor
CPU Intel® Celeron® J4025
Frequency 2-core/2-thread 2.00 GHz base/2.90 GHz burst
Architecture x86 64-bit
Encryption engine AES-NI
Memory
Pre-installed memory 2GB: 1 x 2 GB SODIMM DDR4
Memory slots 2 x SODIMM DDR4
Important
• Use only QNAP memory modules to maintain
system performance and stability. For NAS devices
with more than one memory slot, use QNAP
modules with identical specifications.
• Using unsupported modules may degrade
performance, cause errors, or prevent the
operating system from starting.
Maximum memory 8 GB RAM: 2 x 4 GB
Flash memory 4 GB (dual-boot OS protection)
Storage
Drive bays 4 x 3.5-inch SATA 6 Gbps
Note
The SATA 6 Gbps drive bays are backward compatible
with SATA 3 Gbps drives.
TS-451DeU User Guide
Product Overview 4
Component TS-451DeU-2G
Drive compatibility 3.5-inch bays:
• 3.5-inch SATA hard disk drives
• 2.5-inch SATA hard disk drives
• 2.5-inch SATA solid-state drives
M.2 SSD slots 2 x SATA 6 Gbps
M.2 SSD form factor 2280
SSD cache acceleration support 3.5-inch drive bays:1 to 4
Hot-swapping Supported
Network
2.5 Gigabit Ethernet ports 2 x 2.5 GbE RJ45
Note
The 2.5 Gigabit Ethernet port provides 3 network
connection speeds: 2.5G, 1G, 100M, and 10M.
External I/O Ports & Expansion Slots
USB ports • 2 x USB 2.0 Type-A
• 2 x USB 3.2 Gen 1 Type-A
Interface
Buttons • Power
• Reset
Dimensions
Form factor 1U Rackmount
Dimensions (H x W x D) 43.3 x 430 x 294.9 mm
(1.74 x 16.92 x 11.61 in)
Net weight 4.15 kg (9.15 lbs)
Rail compatibility RAIL-B02
Note
Rail kits are not included with the NAS and must be
purchased separately. For details, contact an
authorized reseller or go to http://shop.qnap.com.
Others
Power supply unit 100W, 100-240V AC, 50/60 Hz
System battery CR2032 lithium battery (3V, 225 mAh)
Sound level 21.6 dB(A)
Note
The sound level was tested at a bystander position,
which is within one meter of the NAS. The test NAS
operated at low speed with the maximum number of
drives installed.
Fans System: 3 x 40 mm, 12V DC fans
Operating temperature 0˚C to 40˚C (32˚F to 104˚F)
TS-451DeU User Guide
Product Overview 5
Component TS-451DeU-2G
Relative humidity • Non-condensing relative humidity: 5% to 95%
• Wet-bulb temperature: 27˚C (80.6˚F)
Security slot Kensington security slot
Package Contents
Item Quantity
TS-451DeU 1
Power cord 1
Ethernet cables 2 x CAT5e cables
Screws for 3.5-inch drives 16
Screws for 2.5-inch drives 12
Heatsinks for M.2 SSDs 2
Handle kit • 2 x handles
• 2 x angle brackets
• 8 x screws
Quick Installation Guide (QIG) 1
Components
Front Panel
No. Component No. Component
1 Drive LEDs 4 USB expansion unit LED
2 M.2 SSD LEDs 5 Status LED
3 LAN LED 6 Power button
TS-451DeU User Guide
Product Overview 6
Rear Panel
No. Component No. Component
1 Reset button 5 Kensington security slot
2 USB 2.0 Type-A ports 6 Power input
3 USB 3.2 Gen 1 Type-A ports 7 System fans
4 2.5 Gigabit Ethernet ports - -
System Board
Note
The image does not include the case cover.
TS-451DeU User Guide
Product Overview 7
No. Component No. Component
1 Memory slot 2 3 M.2 SSD slot 1
2 Memory slot 1 4 M.2 SSD slot 2
Drive Numbering
Installation Requirements
Category Item
Environment • Room temperature: 0˚C to 40˚C (32˚F to 104˚F)
• Non-condensing relative humidity: 5% to 95%
• Wet-bulb temperature: 27˚C (80.6˚F)
• Flat, anti-static surface without exposure to direct sunlight, liquids,
or chemicals
Hardware and peripherals • Storage drives
For the list of compatible drive models, go to https://
www.qnap.com/compatibility.
• Network cable
Tools • Phillips #1 or #2 screwdriver
• Anti-static wrist strap
Safety Information
The following instructions help ensure personal safety and environmental safety. Read these instructions
carefully before performing any operations.
TS-451DeU User Guide
Product Overview 8
General Instructions
• The NAS should be stored in a secure location with restricted access, controlled through the use of a
tool, lock and key, or any means of security.
• Only qualified, skilled, and authorized persons with knowledge of all restrictions, safety precautions,
and installation and maintenance procedures should have physical access to the NAS.
• To avoid potential injury or damage to components, ensure that the drives and other internal system
components have cooled before touching them.
• Observe electrostatic discharge (ESD) procedures to avoid potential injury or damage to components.
Power
• To reduce the risk of fire or electric shock, ensure that you only connect the power cord to a properly
grounded electrical outlet.
•
The device may have one or more power supply unit (PSU) cords. To avoid serious injuries, a trained
service technician must disconnect all PSU cords before installing or replacing system components.
System Battery
• To avoid potential battery explosion, causing injury or damage to components, ensure that you replace
the existing battery with a battery of the same type.
• Dispose of used batteries properly according to local regulations or the instructions of the battery
manufacturer.
Moving Parts
•
Moving fan blades: Keep your body parts away from moving fan blades while the device is connected
to a power source.
•
Moving components: Keep your body parts away from other moving components.
Setting Up the NAS
Important
Read all safety requirements and information in Safety Information carefully before setting
up the NAS or installing NAS components.
1. Place your NAS device in an environment that meets the requirements.
For details, see Installation Requirements.
TS-451DeU User Guide
Product Overview 9
2. Install the NAS on a rack.
For details, see Rail Kits and Installing Handles.
3. Install the drives.
For details, see the following topics:
•Installing 3.5-inch Hard Drives on 3.5-inch Trays
•Installing 2.5-inch Hard Drives or Solid-State Drives on 3.5-inch Trays
•Installing M.2 Solid-State Drives
4. Connect the NAS to the network.
5. Optional: Connect expansion units.
For details, see Connecting USB Expansion Units
6. Connect the power cord and all applicable cables.
7. Power on the NAS.
8. Install QTS.
For details, see QTS Installation.
9. Log on to QTS.
TS-451DeU User Guide
Product Overview 10
3. Installation and Configuration
This chapter provides specific hardware and firmware installation and configuration steps.
Hardware Installation
This section provides information on installing drives, memory modules, handles, and adding expansion
units.
Removing the Case Cover
Warning
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
•
Other moving components: Keep your hands and other body parts away from other
moving components.
1. Power off the NAS.
2. Disconnect the power cord from the electrical outlet.
3. Disconnect all cables and external attachments.
4. Remove the case cover.
a. Loosen the screws.
TS-451DeU User Guide
Installation and Configuration 11
b. Slide the cover back.
c. Lift the cover off the NAS.
Attaching the Case Cover
Warning
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
TS-451DeU User Guide
Installation and Configuration 12
•
Other moving components: Keep your hands and other body parts away from other
moving components.
1. Place the cover on the NAS.
2. Slide the cover forward.
3. Tighten the screws.
4. Connect all cables and external attachments.
5. Connect the power cord to the electrical outlet.
TS-451DeU User Guide
Installation and Configuration 13
6. Power on the NAS.
Drive Installation
The TS-451DeU is compatible with 3.5-inch and 2.5-inch hard drives, 2.5-inch solid-state drives, and M.2
solid-state drives.
Installing 3.5-inch Hard Drives on 3.5-inch Trays
For the list of compatible drive models, go to https://www.qnap.com/compatibility.
Warning
• Installing a drive deletes all data on the drive.
• Observe electrostatic discharge (ESD) procedures to avoid damage to components.
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
•
Other moving components: Keep your hands and other body parts away from other
moving components.
1. Power off the NAS.
2. Remove the drive tray.
a. Pull the tray handle outward.
b. Pull the tray out.
TS-451DeU User Guide
Installation and Configuration 14
3. Install a drive on the tray.
a. Place the drive on the tray so that the holes on the bottom of the drive are aligned with the holes
on the bottom of the tray.
b. Attach the screws.
4. Load the tray into the bay.
TS-451DeU User Guide
Installation and Configuration 15
a. Insert the tray into the bay.
b. Slide the tray into the bay.
c. Push the handle.
d. Lock the tray.
5. Power on the NAS.
Installing 2.5-inch Hard Drives or Solid-State Drives on 3.5-inch Trays
For the list of compatible drive models, go to https://www.qnap.com/compatibility.
Warning
• Installing a drive deletes all data on the drive.
• Observe electrostatic discharge (ESD) procedures to avoid damage to components.
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
•
Other moving components: Keep your hands and other body parts away from other
moving components.
1. Power off the NAS.
TS-451DeU User Guide
Installation and Configuration 16
2. Remove the drive tray.
a. Pull the tray handle outward.
b. Pull the tray out.
3. Install a drive on the tray.
a. Place the tray on the drive so that the holes on the tray are aligned with those on the drive.
b. Attach the screws.
TS-451DeU User Guide
Installation and Configuration 17
4. Load the tray into the bay.
a. Insert the tray into the bay.
b. Slide the tray into the bay.
c. Push the handle.
d. Lock the tray.
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Installation and Configuration 18
5. Power on the NAS.
Installing M.2 Solid-State Drives
The TS-451DeU has two M.2 SATA 6 Gbps SSD slots on the System Board. For a list of compatible M.2
SSDs, go to http://www.qnap.com/compatibility.
Warning
• Installing a drive deletes all data on the drive.
• Observe electrostatic discharge (ESD) procedures to avoid damage to components.
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
•
Other moving components: Keep your hands and other body parts away from other
moving components.
Note
• QNAP recommend installing heatsinks on the M.2 SSD controllers to enhance cooling
efficiency and to ensure consistent performance.
• Before installing non-QNAP heatsinks, ensure that they are of the appropriate size and
shape.
TS-451DeU User Guide
Installation and Configuration 19
1. Power off the NAS.
2. Disconnect the power cord from the electrical outlet.
3. Disconnect all cables and external attachments.
4. Remove the case cover.
For details, see Removing the Case Cover.
5. Install a heatsink on the M.2 SSD controller.
a. Locate the controller on the M.2 SSD.
Note
The location of the controller varies depending on the model and manufacturer of the M.2 SSD.
For details, refer to the documentation or contact the manufacturer.
b. Remove the protective film from the bottom of the heatsink.
c. Install the heatsink on the controller.
TS-451DeU User Guide
Installation and Configuration 20
6. Install the M.2 SSD.
a. Pull out the pushpin.
b. Insert the M.2 SSD.
TS-451DeU User Guide
Installation and Configuration 21
c. Insert the pushpin to secure the drive.
7. Place the NAS in its normal position.
8. Attach the case cover.
For details, see Attaching the Case Cover.
9. Connect all cables and external attachments.
10. Connect the power cord to the electrical outlet.
11. Power on the NAS.
TS-451DeU User Guide
Installation and Configuration 22
Replacing Memory Modules
The TS-451DeU has two memory slots. You can increase the memory capacity of the NAS by upgrading the
memory modules.
Use only QNAP memory modules to maintain system performance and stability. You can purchase QNAP
memory modules from authorized resellers.
Important
Ensure that both memory modules are identical.
Warning
• Observe electrostatic discharge (ESD) procedures to avoid damage to components.
•
Moving fan blades: Keep your hands and other body parts away from moving fan
blades.
•
Other moving components: Keep your hands and other body parts away from other
moving components.
1. Power off the NAS.
2. Disconnect the power cord from the electrical outlet.
3. Disconnect all cables and external attachments.
4. Remove the case cover.
For details, see Removing the Case Cover.
5. Remove an existing module.
a. Push the retention clips outward simultaneously to release the module.
TS-451DeU User Guide
Installation and Configuration 23
b. Verify that the module has tilted upward and is completely released from the slot.
Warning
Attempting to remove a module that is not completely released may damage the module and
the motherboard.
c. Hold the module by the edges.
6. Install a new module.
a. Align the notch with the ridge in the slot.
b. Insert the module into the slot.
c. Verify that the metal connectors are completely inserted into the slot.
TS-451DeU User Guide
Installation and Configuration 24
d. Carefully press down on the module until the retention clips lock the module into place.
7. Attach the case cover.
For details, see Attaching the Case Cover.
8. Connect all cables and external attachments.
9. Power on the NAS.
10. Verify that the module is recognized by the NAS.
a. Log on to QTS as administrator.
b. Go to Control Panel > System > System Status > Hardware Information .
c. Check the value for Total memory.
Connecting USB Expansion Units
The TS-451DeU supports USB expansion units. For details, please see table below.
You can purchase storage expansion accessories from QNAP or an authorized reseller.
For details, go to https://shop.qnap.com/.
For the list of compatible expansion units and the maximum number of applicable expansion units, go to
http://www.qnap.com/go/compatibility-expansion.
Expansion Unit Model Description Required Accessories
TR-004 • Uses a USB 3.2 Gen 1 Type-C
interface
• Supports SATA
• USB 3.2 Gen 1 Type-A to
Type-C cable
• RAIL-B02
TL-R1200C-RP • Uses a USB 3.2 Gen 2 Type-C
interface
• Supports SATA
• USB 3.2 Gen 2 Type-A to
Type-C cable
• RAIL-B02
TS-451DeU User Guide
Installation and Configuration 25
The TS-451DeU supports connecting a maximum of two USB expansion units. You can use any of the
following configurations:
Expansion Unit Type Number of Units Supported
TR-004 2
TL-R1200C-RP 1
1. Connect the expansion unit to the NAS.
a. Connect the USB cable to the USB Type-C port on the expansion unit.
b. Connect the USB cable to a USB 3.2 Gen 1 Type-A port on the NAS.
2. Power on the expansion units.
3. Verify that the expansion units are recognized by the NAS.
a. Log on to QTS as administrator.
b. Go to Main Menu > Storage & Snapshots > Overview > System .
c. Verify that the expansion units are listed.
Installing Handles
Installing handles enables you to better grip and secure the NAS.
1. Power off the NAS.
2. Install a handle on an angle bracket.
a. Align the openings on the handle with the two round screw holes on the angle bracket.
b. Attach the screws to lock the handle to the angle bracket.
TS-451DeU User Guide
Installation and Configuration 26
3. Install the angle bracket on the NAS.
a. Align the holes on the angle bracket with the holes on the chassis.
Note
Ensure that the handle faces the same direction as the front panel.
b. Attach the screws.
4. Install a second handle on the other side of the chassis.
5. Power on the NAS.
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Installation and Configuration 27
Rail Kits
The TS-451DeU is compatible with the following models:
• RAIL-B02
Rail kits are not included with the NAS and must be purchased separately. For details, contact an authorized
reseller or go to http://shop.qnap.com.
You can find installation information in the rail kit package.
QTS Installation
The TS-451DeU uses the QNAP QTS operating system. You can install QTS using any of the following
methods.
Method Description Requirements
Qfinder Pro
installation
(Recommended)
If the NAS is connected to your local area
network, you can do the following:
• Locate the NAS using Qfinder Pro.
• Complete the steps in the Smart
Installation Guide wizard.
For details, see Installing QTS Using
Qfinder Pro.
• Computer
• Network cable
• Qfinder Pro installer
Cloud installation If the NAS is connected to the internet,
you can do the following:
• Scan the QR code on the NAS.
• Specify the Cloud Key.
• Log into your myQNAPcloud account.
• Complete the steps in the Smart
Installation Guide wizard.
For details, see Installing QTS Using the
Cloud Key.
• Computer or mobile device
• Network cable
• myQNAPcloud account
• CloudKey
Installing QTS Using Qfinder Pro
Warning
Installing QTS deletes all data on the drives. Back up your data before proceeding.
1. Power on the NAS.
2. Connect the NAS to your local area network.
3. Run Qfinder Pro on a computer that is connected to the same local area network.
Note
To download Qfinder Pro, go to https://www.qnap.com/utilities.
TS-451DeU User Guide
Installation and Configuration 28
4. Locate the NAS in the list and then double-click the name or IP address.
The Smart Installation Guide opens in the default web browser.
5. Click Start Smart Installation Guide.
6. Specify the following information.
•NAS name: Specify a name with 1 to 14 characters. The name supports letters (A to Z, a to z),
numbers (0 to 9), and hyphens (-), but cannot end with a hyphen.
•Password: Specify an administrator password with 1 to 64 characters. The password supports all
ASCII characters.
7. Click Next.
8. Specify the time zone, date, and time.
Tip
QNAP recommends connecting to an NTP server to ensure that the NAS follows the
Coordinated Universal Time (UTC) standard.
9. Click Next.
10. Select Obtain an IP address automatically (DHCP).
11. Click Next.
12. Select the types of devices that you will use to access shared folders on the NAS.
13. Click Next.
14. Review the settings.
15. Click Apply.
A confirmation message appears.
Warning
Clicking Confirm deletes all data on the drive before installing QTS.
16. Click Confirm.
QTS is installed.
Installing QTS Using the Cloud Key
Warning
Installing QTS deletes all data on the drives. Back up your data before proceeding.
1. Power on the NAS.
2. Connect the NAS to the internet.
3. Go to the QNAP Cloud Installation page using one of the following methods:
• On your computer, go to http://install.qnap.com/.
• Scan the QR code on the NAS using a mobile device.
The web page lists all the uninitialized QNAP NAS devices on the local network.
TS-451DeU User Guide
Installation and Configuration 29
4. Find your NAS from the list and then click Initialize.
Note
If your NAS is not listed, follow the instructions on the web page to specify the Cloud Key on the
NAS.
The installation wizard opens in the default web browser.
5. Create an account or sign in to myQNAPcloud.
Note
You must return to this page to complete the installation after creating an account.
6. Specify the myQNAPcloud device name for the NAS.
Note
• The myQNAPcloud device name is used when remotely accessing the NAS.
• For security purposes, the myQNAPcloud Link remote connection service will be disabled
on your NAS after initialization. You can enable it by connecting to QTS through LAN and
then installing myQNAPcloud Link.
7. Click Next.
The Smart Installation Guide opens in the default web browser.
8. Click Start Smart Installation Guide.
9. Specify the following information.
•NAS name: Specify a name with 1 to 14 characters. The name supports letters (A to Z, a to z),
numbers (0 to 9), and hyphens (-), but cannot end with a hyphen.
•Password: Specify an administrator password with 1 to 64 characters. The password supports all
ASCII characters.
10. Click Next.
11. Specify the time zone, date, and time.
Tip
QNAP recommends connecting to an NTP server to ensure that the NAS follows the
Coordinated Universal Time (UTC) standard.
12. Click Next.
13. Select Obtain an IP address automatically (DHCP).
14. Click Next.
15. Select the types of devices that you will use to access shared folders on the NAS.
16. Click Next.
17. Review the settings.
18. Click Apply.
A confirmation message appears.
TS-451DeU User Guide
Installation and Configuration 30
Warning
Clicking Confirm deletes all data on the drive before installing QTS.
19. Click Confirm.
QTS is installed.
TS-451DeU User Guide
Installation and Configuration 31
4. Basic Operations
This chapter describes basic NAS operations.
Power Button
Operation User Action Result
Power on Press the button once. The NAS powers on.
Power off Press and hold the button for 1.5
seconds.
The NAS powers off.
Force power off Press and hold the button for 5
seconds.
The NAS shuts down.
Important
Use this method only
when the NAS is
unresponsive.
Reset Button
Operation User Action Result
Basic system reset Press and hold the
button for 3 seconds.
The following settings are reset to default:
• System administrator password: MAC address of
adapter 1 without special characters. For example, if
the MAC address of adapter 1 is 11:22:33:44:55:66,
then the admin password will be 112233445566.
Tip
You can find the MAC address of adapter 1
using Qfinder Pro. A label attached to the
device also lists the address as MAC1.
• TCP/IP configuration:
• Obtain IP address settings automatically via
DHCP
• Disable jumbo frames
• If port trunking is enabled (multi-LAN models
only), the port trunking mode is reset to “Active
Backup (Failover)”.
• System port: 8080 (system service port)
• Security level: Low (Allow all connections)
• LCD panel password: (blank)
• VLAN: Disabled
Advanced system
reset
Press and hold the
button for 15 seconds.
The default factory settings are restored.
• To retrieve old data after an advanced system reset,
recreate the previous folder structure on the NAS.
TS-451DeU User Guide
Basic Operations 32
LEDs
LEDs indicate system status and related information when the device is powered on. The following LED
information applies only when the drive is correctly installed and when the device is connected to the
network or to a host.
For details on the location of the LEDs, see Components .
TS-451DeU User Guide
Basic Operations 33
LED Status Description
System Status Flashes green and red
alternately every 0.5
seconds
• The drive is being formatted.
• The device is being initialized.
• The operating system is being updated.
• RAID rebuilding is in progress.
• Online RAID Capacity Expansion is in progress.
• Online RAID Level Migration is in progress.
• The firmware is being updated.
Important
When updating the firmware, do not remove
the power cable or USB cable, and do not
force-exit the application.
Red • The drive is invalid.
• The disk volume has reached its full capacity.
• The disk volume is about to reach its full capacity.
• The system fan is not functioning.
• An error occurred when accessing (read/write) the
data.
• A bad sector is detected on the hard drive.
• The device is in degraded read-only mode (two
member drives failed in RAID 5 or RAID 6 but the data
can still be read).
• A hardware self-test error occurred.
• The system temperature is over the threshold.
Flashes red every 0.5
seconds
The NAS is in degraded mode (one member drive failed in
RAID 1).
Flashes green every 0.5
seconds
• The device is starting up.
• The device is not configured.
• A drive is not formatted.
Flashes green every 2
seconds
All drives are in standby mode.
Flashes green every second The device is not configured.
Green The device is ready.
Off • All drives are in standby mode.
• The device is powered off.
LAN Orange A read/write error occurred while another device is
accessing data.
Flashes orange The device is being accessed from the network.
TS-451DeU User Guide
Basic Operations 34
LED Status Description
Drive Flashes red The data is being accessed and a read/write error occurs
during the process.
Red • A drive read/write error occurred.
• The drive temperature is over the threshold.
Flashes green • Data is being accessed.
• Data is being copied.
Green • The drive can be accessed.
• The device is powered on.
Off No drive is detected.
M.2 SSD Flashes red The drive is being located.
Red A drive read/write error has occurred.
Flashes green The data is being accessed.
Green The drive can be accessed.
Off No drive is detected.
USB Expansion
Unit
Blue A QNAP USB external storage device is connected to a
USB port.
Off No USB external storage devices connected.
Audio Alert
Duration Frequency Description
Short beep (0.5 seconds) 1 • The NAS is starting up.
• The NAS is shutting down (software shutdown).
• The user pressed the Reset button.
• The operating system was updated.
3 The user tried to copy the NAS data to the external
storage device from the front USB port, but the data
cannot be copied.
Long beep (1.5 seconds) 3 (every 5 minutes) The system fan is not functioning.
2 • The disk volume is about to reach its full
capacity.
• The disk volume has reached its full capacity.
• The drives are in degraded mode.
• The user started the drive rebuilding process.
• A drive is plugged in or out.
1 • The NAS was powered off by force shutdown
(hardware shutdown).
• The NAS was powered on successfully and is
ready.
TS-451DeU User Guide
Basic Operations 35
5. Troubleshooting
This chapter describes basic troubleshooting information.
Forcing Qfinder Pro or myQNAPcloud to Locate the NAS
If Qfinder Pro or myQNAPcloud is unable to locate the NAS during QTS installation, the drives or data may
be faulty.
1. Power off the NAS.
2. Remove all drives.
3. Power on the NAS.
4. Locate the NAS using Qfinder Pro or myQNAPcloud.
5. Reinsert the drives.
6. Continue with the QTS installation.
Hot-swapping Failed Drives
The NAS supports hot-swapping of drives when one member drive fails in RAID 1.
1. Log on to QTS.
2. Go to Main Menu > Storage Manager > Storage > Disks/VJBOD .
3. Locate the failed drive.
4. Prepare a new hard drive with a capacity that is the same as or larger than the failed hard drive.
5. Remove the failed drive from the NAS.
6. Wait for 20 seconds or until the NAS beeps twice.
7. Remove the failed drive from the drive tray.
8. Insert the new drive into the drive tray.
9. Install the new drive.
The NAS beeps twice.
10. Go to Main Menu > Storage Manager > Storage Space .
11. Locate the volume that contains the new drive and then verify that the status is Rebuilding.
Recovering Unintentionally Removed Healthy Drives
The NAS supports exclusive RAID recovery technology to recover failed RAID disk volumes from
unintentional disconnection or removal of drives. Users can recover an inactive RAID 1, RAID 5, or RAID 6
volume to degraded mode, or an inactive RAID 0 and JBOD configuration to normal.
Disk Volume RAID Recovery Support Maximum Number of Removed Drives
Single No N/A
JBOD Yes 1
TS-451DeU User Guide
Troubleshooting 36
Disk Volume RAID Recovery Support Maximum Number of Removed Drives
RAID 0 Yes 1
RAID 1 Yes 1
RAID 5 Yes 2
RAID 6 Yes 3
RAID 10 No N/A
Support and Other Resources
QNAP provides the following resources:
Resource URL
Documentation https://docs.qnap.com
Service Portal https://service.qnap.com
Downloads https://download.qnap.com
Community Forum https://forum.qnap.com
TS-451DeU User Guide
Troubleshooting 37
6. Glossary
CloudKey
Unique 8-digit code assigned to each NAS device
myQNAPcloud Link
Enables you to access the NAS over the internet without configuring complex port forwarding settings
myQNAPcloud
Provides various remote access services such as DDNS and myQNAPcloud Link
myQNAPcloud ID
Email address that was used to register for a myQNAPcloud account
Qfinder Pro
QNAP utility that lets you locate and access QNAP NAS devices in your local area network
QTS
QNAP NAS operating system
TS-451DeU User Guide
Glossary 38
7. Notices
This chapter provides information about warranty, disclaimers, licensing, and federal regulations.
Limited Warranty
QNAP offers limited warranty service on our products. Your QNAP-branded hardware product is warranted
against defects in materials and workmanship for a period of one (1) year or more from the date printed on
the invoice. ("Warranty Period"). Please review your statutory rights at www.qnap.com/warranty, which may
be amended from time to time by QNAP in its discretion.
Disclaimer
Information in this document is provided in connection with products of QNAP Systems, Inc. (the "QNAP").
No license, express or implied, by estoppels or otherwise, to any intellectual property rights is granted by this
document. Except as provided in QNAP's terms and conditions of sale for such products, QNAP assumes no
liability whatsoever, and QNAP disclaims any express or implied warranty, relating to sale and/or use of
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infringement of any patent, copyright or other intellectual property right.
QNAP products are not intended for use in medical, life saving, life sustaining, critical control or safety
systems, or in nuclear facility applications.
In no event shall QNAP’s liability exceed the price paid for the product from direct, indirect, special,
incidental, or consequential damages resulting from the use of the product, its accompanying software, or its
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Back up the system periodically to avoid any potential data loss is recommended. QNAP disclaims any
responsibility of all sorts of data loss or recovery.
Should you return any components of the package of QNAP products such as NAS (Network Attached
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All the features, functionality, and other product specifications are subject to change without prior notice or
obligation. Information contained herein is subject to change without notice.
Further, the ® or ™ symbols are not used in the text.
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TS-451DeU User Guide
Notices 39
Free Software Foundation, use the GNU General Public License for most of our software; it applies also to
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TS-451DeU User Guide
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TS-451DeU User Guide
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TS-451DeU User Guide
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TS-451DeU User Guide
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version of the GNU General Public License “or any later version” applies to it, you have the option of
following the terms and conditions either of that numbered version or of any later version published by
the Free Software Foundation. If the Program does not specify a version number of the GNU General
Public License, you may choose any version ever published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future versions of the GNU General Public
License can be used, that proxy's public statement of acceptance of a version permanently authorizes
you to choose that version for the Program.
Later license versions may give you additional or different permissions. However, no additional
obligations are imposed on any author or copyright holder as a result of your choosing to follow a later
version.
16. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
17. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR
DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES
OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
18. Interpretation of Sections 16 and 17.
If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect
according to their terms, reviewing courts shall apply local law that most closely approximates an
absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of
liability accompanies a copy of the Program in return for a fee.
TS-451DeU User Guide
Notices 46
END OF TERMS AND CONDITIONS
CE Notice
This QNAP NAS complies with CE Compliance Class A.
FCC Notice
FCC Class A Notice
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired
operation.
Note
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy, and if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be
required to correct the interference at his own expense.
Important
Any modifications made to this device that are not approved by QNAP Systems, Inc. may
void the authority granted to the user by the FCC to operate this equipment.
VCCI Notice
この装置は、クラス A 情報技術装置です。この装置を家庭環境で使用すると電波
妨害を引き起こすことがあります。この場合には使用者が適切な対策を講ずるよう要求されることがありま
す。
VCCI–A
TS-451DeU User Guide
Notices 47
BSMI Notice
警告使用者：這是甲類的資訊產品，在居住的環境中使用時，可能會造成射頻干擾，在
這種情況下，使用者會被要求採取某些適當的對策。
SJ/T 11364-2006
本产品符合中国 RoHS 标准。以下表格标示此产品中某有毒物质的含量符合中国
RoHS 标准规定的限量要求。
本产品上会附有”环境友好使用期限”的标签，此期限是估算这些物质”不会有泄漏或突变”的年限。本产品
可能包含有较短的环境友好使用期限的可替换元件，像是电池或灯管，这些元件将会单独标示出来。
部件名称 有毒有害物质或元素
铅
(Pb)
汞
(Hg)
镉
(Cd)
六价铬
(CR(VI))
多溴联苯
(PBB)
多溴二苯醚
(PBDE)
壳体 0 0 0 0 0 0
显示 0 0 0 0 0 0
印刷电路板 0 0 0 0 0 0
金属螺帽 0 0 0 0 0 0
电缆组装 0 0 0 0 0 0
风扇组装 0 0 0 0 0 0
电力供应组装 0 0 0 0 0 0
电池 0 0 0 0 0 0
O: 表示该有毒有害物质在该部件所有物质材料中的含量均在 SJ/T11363-2006 标准规定的限量要求以下。
X: 表示该有毒有害物质至少在该部件的某一均质材料中的含量超出 SJ/T11363-2006 标准规定的限量要求。
TS-451DeU User Guide
Notices 48