QNAP TS-251+ Instructions for use

2016/08/11
QNAP Turbo NAS
Hardware User Manual
© 2016. QNAP Systems, Inc. All Rights Reserved.

2
Thank you for choosing QNAP products! This user manual provides description of the
hardware of the Turbo NAS and relevant guideline of certain functions. Please read carefully
and strictly adhere to the instructions of the manual.
This user manual is applicable to the following Turbo NAS models:
HS-210, HS-251, HS-251+, TS-112P, TS-131, TS-212P, TS-231, TS-231+,TS-251,
TS-251+, TS-251C, TS-251A, TS-253 Pro, TS-431, TS-431+, TS-431U, TS-451, TS-451+,
TS-451S, TS-451U, TS-451A, TS-453 Pro, TS-453S Pro (formerly SS-453 Pro), TS-453U,
TS-453U-RP, TS-463U, TS-463U-RP, TVS-463, TS-470U-SP/RP, TS-531P, TS-563, TS-651,
TS-653 Pro, TVS-663, TS-831X, TS-851, TS-853 Pro, TS-853S Pro (formerly SS-853
Pro),TS-853U, TS-853U-RP, TS-863U, TS-863U-RP, TVS-863, TVS-863+, TS-870U-RP,
TS-879 Pro, TS-879U-RP, TS-EC879U-RP, TS-1079 Pro, TS-1253U, TS-1253U-RP,
TS-1263U, TS-1263U-RP, TS-1270U-RP, TS-1279U-RP, TS-EC1279U-RP, TS-1679U-RP,
TS-EC1679U-RP, IS-453S, TS-453mini, TAS-168, TAS-268, TS-253A, TS-453A, TS-653A,
TS-853A, TS-128, TS-228, TBS-453A
NOTE
The “Turbo NAS”& “Turbo vNAS” are hereafter referred to as “NAS”.
The product you purchased may not support certain functions dedicated to specific
models.
All features, functionality, and other product specifications are subject to change
without prior notice or obligation.
Information presented is subject to change without notice.
No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, mechanical, electronic, photocopying,
recording, or otherwise, without prior written permission of QNAP Systems, Inc.
QNAP and the QNAP logo are registered trademarks of QNAP Systems, Inc. Other
products and company names mentioned herein may be the trademarks of their
respective companies.

3
DISCLAIMER
In no event shall QNAP Systems, Inc. (QNAP) 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 documentation. QNAP makes no warranty
or representation, expressed, implied, or statutory, with respect to its products or the
contents or use of this documentation and all accompanying software, and specifically
disclaims its quality, performance, merchantability, or fitness for any particular purpose.
QNAP reserves the right to revise or update its products, software, or documentation
without obligation to notify any individual or entity.
Note:
Back up your system periodically to avoid any potential data loss. QNAP disclaims any
responsibility of all sorts of data loss or recovery.
Should you return any components of the NAS package for refund or maintenance,
make sure they are carefully packed for shipping. Any form of damages due to
improper packaging will not be compensated.

4
Regulatory Notice
FCC Notice
QNAP NAS comply with different FCC compliance classes. Please refer the Appendix for
details. Once the class of the device is determined, refer to the following corresponding
statement.
=======================================================
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.
Modifications: 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.
A급기기
(업무용정보통신기기)
이기기는업무용으로전자파적합등록을한기기이오니, 판매자또는사용자는이점을주위하시기바라며,
만약잘못판매또는구입하였을때에는가정용으로교환하시기바랍니다.

5
FCC Class B 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 B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/television technician for help.
Modifications: 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.
CE NOTICE
QNAP NAS comply with different CE compliance classes. Please refer to the Appendix for
details.

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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
O
O
O
O
O
O
显示
O
O
O
O
O
O
印刷电路板
O
O
O
O
O
O
金属螺帽
O
O
O
O
O
O
电缆组装
O
O
O
O
O
O
风扇组装
O
O
O
O
O
O
电力供应组装
O
O
O
O
O
O
电池
O
O
O
O
O
O
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。

7
Symbols in this document
Warning
This icon indicates the instructions must be strictly followed. Failure
to do so could result in injury to human body or death.
Caution
This icon indicates the action may lead to disk clearance or loss OR
failure to follow the instructions could result in data damage, disk
damage, or product damage.

8
Table of Contents
Safety Warnings...............................................................................................10
Chapter 1. CPU and Memory Specifications ................................................... 11
Chapter 2. Power Button and Reset Button Behavior ....................................29
Chapter 3. USB One Touch Copy ....................................................................30
Chapter 4. LED and Alarm Buzzer Specifications ........................................... 31
Chapter 5. Upgrade Memory on QNAP Turbo NAS (RAM Module Installation) 34
5.1 TS-453MINI (4-BAY) ................................................................................. 34
5.2 TBS-453A ............................................................................................. 36
5.3 TS-451S, TS-531P, TS-651, TS-831X, TS-851, TS-X53/X53S PRO,TS-563,
TVS-X63, TS-X53A SERIES (2/4/6/8-BAY) ..................................................... 38
5.4 TS-431U, TS-451U, TS-X53U, TS-X63U SERIES (4/8/12-BAY) .......................... 39
5.5 TS-251+, TS-251, TS-451+, TS-451, TS-251A, TS-451A ............................. 41
5.6 IS-453S................................................................................................ 44
Chapter 6. Network Expansion Card Installation ...........................................47
6.1 TVS-463, TS-531P, TVS-663, TS-831X, TVS-863, TS-563, TS-879 PRO,TS-1079
PRO,TS-463U, TS-463U-RP...................................................................... 47
6.2 TS-463U, TS-463U-RP, TVS-471U............................................................. 51
6.3 TS-863U, TS-863U-RP, TS-1263U, TS-1263U-RP ........................................ 54
Chapter 7. Install and Hot-swap Hard Drives ................................................57
7.1 INSTALL HARD DRIVES ................................................................................ 57
7.1.1. TS-x51, TS-x51A, TVS-x63, TS-563, TS-x53 Pro, TS-651, TS-831X, TS-851,
TS-531P, TS-x53A ........................................................................... 57
7.1.2. TS-453Mini..................................................................................... 59
7.1.3. TS-112P, TS-212P and TS-251C........................................................ 61
7.1.4. TAS-168, TAS-268, TS-128, TS-228 .................................................. 63
7.1.5. IS-453S ......................................................................................... 65
7.1.6. TBS-453A....................................................................................... 67
7.2 HARD-SWAP HARD DRIVES ........................................................................... 68
Chapter 8. RAID Recovery ............................................................................. 72
Chapter 9. Use the LCD Panel ........................................................................74
Chapter 10. Install Power Supply Unit............................................................. 79

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10.1 1U TURBO NAS WITH HOT-SWAPPABLE PSU ...................................................... 79
10.2 2U/3U TURBO NAS (TS-853U-RP, TS-1253U-RP ONLY).................................... 80
Technical Support ............................................................................................ 83
GNU GENERAL PUBLIC LICENSE ....................................................................... 84
Appendix A: Product Compliance Class.............................................................97

10
Safety Warnings
1. The NAS can operate normally in a temperature range of 0ºC–40ºC (or up to 35 ºC
depending on individual product specifications) with relative humidity of 0%–95%.
Please make sure the environment is well-ventilated.
2. The power cord and devices connected to the NAS must provide correct supply voltage
(100W, 90–264V).
3. Do not place the NAS in direct sunlight or near chemicals. Make sure the temperature
and humidity of the environment are in optimized level.
4. Unplug the power cord and all connected cables before cleaning. Wipe the NAS with a
dry towel. Do not use chemical or aerosol to clean the NAS.
5. Do not place any objects on the NAS for the server’s normal operation and to avoid
overheat.
6. Use the flat head screws in the product package to lock the hard disks in the NAS when
installing hard disks for proper operation.
7. Do not place the NAS near any liquid.
8. Do not place the NAS on any uneven surface to avoid falling off and damage.
9. Make sure the voltage is correct in the location where the NAS is installed. Contact the
distributor or the local power supply company for the information.
10. Do not place any object on the power cord.
11. Do not attempt to repair the NAS in any occasions. Improper disassembly of the
product may expose the users to electric shock or other risks. For any enquiries,
please contact the distributor.
12. The chassis NAS models should only be installed in the server room and maintained by
the authorized server manager or IT administrator. The server room is locked by key or
keycard access and only certified staff is allowed to enter the server room.
Warning:
Danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type recommended by the manufacturer. Dispose of used batteries
according to the manufacturer’s instructions.
Do NOT touch the fan inside the system to avoid serious injuries.

11
Chapter 1. CPU and Memory Specifications
Caution: Modifying the hardware, software, or firmware of the QNAP products will
void the warranty. QNAP is not responsible for any form of damage or loss of data caused
by modding the QNAP products. Users should bear their own risks of all sorts of possible
data loss or system instabilities due to changing the hardware parts, modifying the default
system firmware or installing any unauthorized third party applications on QNAP products.
System
TS-112P
TS-212P
CPU
Marvell 1.6GHz
Marvell 1.6GHz
Memory
512MB DDR2
512MB DDR2
Flash
16MB
16MB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
1
2
System
TS-128
TS-228
CPU
Dual-core ARM® v7
1.1GHz
Dual-core ARM® v7
1.1GHz
Memory
1GB DDR3
1GB DDR3
Flash
4GB
4GB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
1 (3.5” HDDs only)
2 (3.5” HDDs only)

12
System
TS-131
TS-231
CPU
Dual-core FreescaleTM
1.2GHz
Dual-core FreescaleTM
1.2GHz
Memory
512MB DDR3
512MB DDR3
Flash
512MB
512MB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
1
2
System
TAS-168
TAS-268
CPU
Dual-core Realtek
1.1GHz
Dual-core Realtek
1.1GHz
Memory
2GB DDR3
2GB DDR3
Flash
4GB
4GB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
1 (3.5” HDDs only)
2 (3.5” HDDs only)
IR sensor
✔(QNAP remote
control: RM-IR003)
✔(QNAP remote
control: RM-IR003)

13
System
TS-431
TS-431U
CPU
Dual-core FreescaleTM
1.2GHz
Dual-core FreescaleTM
1.2GHz
Memory
512MB DDR3
1GB DDR3
Flash
512MB
512MB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
4
4
System
TS-231+
TS-431+
CPU
Annapurna Labs
Alpine AL-212
Dual-core 1.4 GHz
Cortex-A15
Annapurna Labs
Alpine AL-212
Dual-core 1.4 GHz
Cortex-A15
Memory
1GB DDR3
1GB DDR3
Flash
512MB
512MB
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
2
4
PCI-E expansion
slot
-
-
Built-in 10GbE LAN
ports
-
-

14
System
TS-531P
TS-831X
CPU
Quad-core Annapurna
Labs Alpine AL-314
1.4 GHz Cortex-A15
Quad-core Annapurna
Labs Alpine AL-314
1.4 GHz Cortex-A15
Memory
2GB/8GB DDR3
(Expandable RAM, up
to 16GB)
8GB/16GB DDR3
(Expandable RAM, up
to 16GB)
Flash
512MB
512MB
Memory
replaceable
✔(Compatible with
DDR3 RAM)
✔(Compatible with
DDR3 RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
5
8
PCI-E expansion
slot
1
1
Built-in 10GbE LAN
ports
-
2 x SFP+
System
HS-210
CPU
Marvell 1.6GHz
Memory
512MB DDR3
Flash
16MB
Memory
replaceable
-
Number of RAM
slots
-
Number of hard
drive slots
2

15
System
TS-451U
TS-453U
TS-453U-RP
CPU
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Memory
1GB DDR3L
(Expandable RAM, up
to 8GB)
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB (USB DOM)
512MB (USB DOM)
512MB (USB DOM)
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
4
4
4
Power supply unit
250W
250W
2 x 250W
System
TS-853U
TS-853U-RP
CPU
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Memory
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB (USB DOM)
512MB (USB DOM)
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
8
8
Power supply unit
250W
2 x 250W

16
System
TS-1253U
TS-1253U-RP
CPU
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Memory
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
4GB/8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB (USB DOM)
512MB (USB DOM)
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
12
12
Power supply unit
250W
2 x 250W
System
IS-453S
CPU
Quad-core Intel®
Atom™1.91GHz
Memory
IS-453S-2G: 2GB
DDR3L
IS-453S-8G: 8GB
DDR3L
Flash
512MB (USB DOM)
CPU replaceable
-
Memory
replaceable
✔(Compatible with
DDR3L-1333/1600
SODIMM RAM)
Number of RAM
slots
2 (SODIMM)
Number of hard
drive slots
4 (2.5" only)

17
System
TS-251C
TS-251 /
TS-251-4G
TS-251A-2G /
TS-251A-4G
CPU
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel®
Celeron™ 1.6GHz (up
to 2.48GHz)
Memory
1GB DDR3L
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
512MB
Memory
replaceable
-
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L-1600 RAM)
Number of RAM
slots
-
2(SODIMM)
2(SODIMM)
Number of hard
drive slots
2 (3.5” HDDs only)
2
2
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
System
TS-451 /
TS-451-4G
TS-451A-2G /
TS-451A-4G
TS-451S
CPU
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel®
Celeron™ 1.6GHz (up
to 2.48GHz)
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Memory
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
1GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
512MB
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L-1600 RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2(SODIMM)
2 (SODIMM)
Number of hard
drive slots
4
2
4 (2.5” only)
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)

18
System
TS-651 /
TS-651-4G
TS-851 /
TS-851-4G
CPU
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Memory
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
6
8
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
System
HS-251+
HS-251 /
HS-251-2G
CPU
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Dual-core Intel®
Celeron™ 2.41GHz
(up to 2.58GHz)
Memory
2GB DDR3L
1GB / 2GB DDR3L
Flash
512MB
512MB
CPU replaceable
-
-
Memory
replaceable
-
-
Number of RAM
slots
-
-
Number of hard
drive slots
2
2
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)

19
System
TBS-453A-4G/
TBS-453A-4G-1TB
/TBS-453A-4G-51
2GB
TBS-453A-8G/
TBS-453A-8G-1TB
/TBS-453A-8G-51
2GB
CPU
Quad-core Intel®
Celeron™N3150
1.6GHz (up to
2.08GHz)
Quad-core Intel®
Celeron™N3150
1.6GHz (up to
2.08GHz)
Memory
4GB DDR3L
8GB DDR3L
Flash
4GB
4GB
CPU replaceable
-
-
Memory
replaceable
✔(Compatible with
DDR3L RAM)
✔(Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
4
4
IR sensor
✔(QNAP remote
control: RM-IR002 &
RM-IR003)
✔(QNAP remote
control: RM-IR002 &
RM-IR003)

20
System
TS-251+-2G /
TS-251+-8G
TS-253 Pro /
TS-253 Pro-8G
TS-453mini-2G /
TS-453mini-8G
CPU
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Quad-core Intel®
Celeron™ 2.0GHz (up
to 2.42GHz)
Memory
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
512MB
Memory
replaceable
✔(Compatible with
DDR3L-1333/1600
RAM)
✔(Compatible with
DDR3L-1333/1600
RAM)
✔(Compatible with
DDR3L-1333/1600
RAM)
Number of RAM
slots
2(SODIMM)
2(SODIMM)
2 (SODIMM)
Number of hard
drive slots
2
2
4
LCD panel
-
-
-
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)