QNAP HS-251 Instructions for use

2015/01/14
QNAP Turbo NAS
Hardware User Manual
© 2015. QNAP Systems, Inc. All Rights Reserved.

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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, TS-112P, TS-131, TS-212P, TS-231, TS-231+,TS-251, TS-251C, TS-253
Pro, TS-269H, TS-420U, TS-421U, TS-431, TS-431+, TS-451, TS-451S, TS-451U, TS-453
Pro, TS-453S Pro (formerly SS-453 Pro), TS-453U, TS-453U-RP, TVS-463, TS-470U-SP/RP,
TS-651, TS-653 Pro, TVS-663, TS-851, TS-853 Pro, TS-853S Pro (formerly SS-853 Pro),
TS-853U, TS-853U-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-1270U-RP, TS-1279U-RP,
TS-EC1279U-RP, TS-1679U-RP, TS-EC1679U-RP, IS-400 Pro
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.

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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.

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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.

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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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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.

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Table of Contents
Safety Warnings.................................................................................................8
Chapter 1. CPU and Memory Specifications .....................................................9
Chapter 2. Power Button and Reset Button Behavior ....................................21
Chapter 3. USB One Touch Copy ....................................................................22
Chapter 4. LED and Alarm Buzzer Specifications ...........................................23
Chapter 5. Upgrade Memory on QNAP Turbo NAS (RAM Module Installation) 26
5.1 TS-451S, TS-651, TS-851, TS-X53/X53S PRO,TVS-X63 SERIES (2/4/6/8-BAY) ... 26
5.2 TS-451U, TS-X53U SERIES (4/8/12-BAY)...................................................... 28
5.3 TS-879U-RP, TS-1279U-RP, TS-EC879U-RP, TS-EC1279U-RP, TS-1679U-RP,
TS-EC1679U-RP, TS-870U-RP, TS-1270U-RP .............................................. 32
5.4 TS-251, TS-451 ..................................................................................... 34
Chapter 6. Network Expansion Card Installation ...........................................38
6.1 TVS-463, TVS-663, TVS-863, TS-879 PRO,TS-1079 PRO .............................. 38
6.2 TS-879U-RP, TS-EC879U-RP, TS-1279U-RP, TS-EC1279U-RP, TS-1679U-RP,
TS-EC1679U-RP ..................................................................................... 42
6.3 TS-870U-RP, TS-1270U-RP ...................................................................... 46
Chapter 7. Install and Hot-swap Hard Drives ................................................48
7.1 INSTALL HARD DRIVES ................................................................................ 48
7.2 HARD-SWAP HARD DRIVES ........................................................................... 50
Chapter 8. RAID Recovery ............................................................................. 53
Chapter 9. Use the LCD Panel ........................................................................55
Chapter 10. Install Power Supply Unit.............................................................60
10.1 1U TURBO NAS........................................................................................ 60
10.2 TS-470U-RP/SP ..................................................................................... 61
10.3 2U/3U TURBO NAS (TS-853U-RP, TS-1253U-RP, TS-1279U-RP, TS-EC1279U-RP,
TS-1679U-RP, AND TS-EC1679U-RP ONLY) ................................................... 62
Technical Support ............................................................................................ 66
GNU GENERAL PUBLIC LICENSE ....................................................................... 67
Appendix A: Product Compliance Class.............................................................80

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Safety Warnings
1. The NAS can operate normally in the temperature of 0ºC–40ºC and 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.

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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
ARM 1.6GHz
ARM 1.6GHz
Memory
512MB DDR2
512MB DDR2
Flash
16MB
16MB
Memory replaceable
No
No
Number of SODIMM
slots
0
0
Number of hard drive
slots
1
2
System
TS-131
TS-231
TS-431
CPU
Dual-core ARM™Cortex™
-A9 1.2GHz
Dual-core ARM™Cortex™
-A9 1.2GHz
Dual-core ARM™Cortex™
-A9 1.2GHz
Memory
512MB DDR3
512MB DDR3
512MB DDR3
Flash
512MB
512MB
512MB
Memory replaceable
No
No
No
Number of SODIMM
slots
0
0
0
Number of hard drive
slots
1
2
4

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System
TS-231+
TS-431+
CPU
Dual-core ARM™
Cortex™-A15 1.4GHz
Dual-core ARM™
Cortex™-A15 1.4GHz
Memory
1GB DDR3
1GB DDR3
Flash
512MB
512MB
Memory replaceable
No
No
Number of SODIMM
slots
0
0
Number of hard drive
slots
2
4
System
HS-210
CPU
ARM 1.6GHz
Memory
512MB DDR3
Flash
16MB
Memory replaceable
No
Number of SODIMM
slots
0
Number of hard drive
slots
2
System
TS-269H
CPU
Dual-core Intel® 1.6
GHz
Memory
2GB DDR3
Flash
512MB
Memory replaceable
No
Number of SODIMM
slots
0
Number of hard drive
slots
2