QNAP TS-251 - User Manual

QNAP Turbo NAS
Hardware User Manual
© 2017. QNAP Systems, Inc. All Rights Reserved.

QNAP TS-251 Specifications

General

Flash Memory	512MB
Drive Bays	2
Hot Swappable Drive	Yes
Power Supply	65W adapter, 100-240V
Form Factor	Tower
Memory	1GB DDR3L RAM (expandable up to 8GB)
Network	2 x Gigabit RJ-45 Ethernet port
USB Ports	2 x USB 3.0, 2 x USB 2.0
HDMI Output	1
Weight	1.28 kg
Operating System	QTS
Dimensions	168 x 102 x 225 mm (6.61 x 4.02 x 8.86 inches)

Summary

Regulatory Notice

FCC Notice

Details regarding Federal Communications Commission (FCC) compliance.

FCC Class A Notice

Compliance statement for FCC Class A digital devices.

Symbols in this document

Safety Warnings

Chapter 1. CPU and Memory Specifications

Chapter 2. Power Button and Reset Button Behavior

Chapter 3. USB One Touch Copy

Chapter 4. LED and Alarm Buzzer Specifications

Chapter 5. Upgrade Memory on QNAP Turbo NAS (RAM Module Installation)

TS-453 Bmini, TS-453 mini (4-bay)

Memory upgrade procedure for TS-453Bmini and TS-453mini models.

TS-451 S, TS-531 P, TS-531 X, TS-651, TS-831 X, TS-851, TS-x53;x53 S Pro, TS-563, TVS-882 S, TVS-882 ST, TVS-x63, TS-x53 Aseries (2;4;6;8-bay)

RAM installation for a wide range of TS and TVS series NAS models.

TS-431 U, TS-x31 XU series, TS-451 U, TS-x53 U, TS-x63 U series (4;8;12-bay)

RAM installation guide for TS-431U and related series NAS models.

IS-453 S

Specific memory installation instructions for the IS-453S model.

Chapter 6. Network Expansion Card Installation

TVS-463, TS-531 P, TS-531 X, TVS-663, TS-831 X, TS-863, TS-563, TS-879 Pro, TS-1079 Pro, TS-463 U, TS-463 U-RP

Installing network cards in specific TVS, TS, and Pro series NAS models.

TS-1635

Procedure for installing a network expansion card in the TS-1635 NAS.

TVS-473, TVS-673, TVS-873

Network card installation guide for TVS-473, TVS-673, and TVS-873 models.

TS-431 XU, TS-463 U, TS-463 U-RP, TVS-471 Series

Steps for installing network expansion cards in TS-431XU and TVS-471 models.

TS-831 XU, TS-863 U, TS-863 U-RP, TS-1231 XU, TS-1263 U, TS-1263 U-RP Series

Guide for installing network cards in TS-831XU and TS-1231XU series NAS.

Chapter 7. Install and Hot-swap Hard Drives

TS-x51, TS-x51 A, TVS-x63, TS-563, TS-x53 Pro, TS-651, TS-831 X, TS-851, TS-531 X, TS-531 P, TS-x53 A, TS-x31, TS-x31+, TS-x31 P, TS-431 U, TS-x31 XU, TS-451 U, TS-x53 U, TS-x63 U

Hard drive installation for a broad range of QNAP NAS models.

TS-1635

Steps for installing hard drives in the TS-1635 NAS model.

TS-453 Bmini, TS-453 Mini

Procedure for installing hard drives in the TS-453Bmini and TS-453Mini.

TVS-473, TVS-673, TVS-873

Hard drive installation guide for TVS-473, TVS-673, and TVS-873 models.

TS-112 P, TS-212 P and TS-251 C

Hard drive installation instructions for TS-112P, TS-212P, and TS-251C.

TAS-168, TAS-268, TS-128, TS-228

Procedure for installing hard drives in TAS and TS series NAS models.

IS-453 S

Specific hard drive installation steps for the IS-453S model.

Hot-swap Hard Drives

Information and compatibility for hot-swapping hard drives.

Chapter 8. Install M.2 SSDs

M.2 SSD Heat Sink Installation

Guidance on attaching heat sinks to M.2 SSD controllers for optimal operation.

TBS-453 A

Procedure for installing M.2 SSDs in the TBS-453A model.

TVS-473, TVS-673, TVS-873

M.2 SSD installation steps for TVS-473, TVS-673, and TVS-873 models.

Chapter 9. RAID Recovery

Chapter 10. Use the LCD Panel

Chapter 11. Install Power Supply Unit

1 U Turbo NAS with Hot-swappable PSU

Procedure for installing a redundant PSU in 1U rackmount NAS models.

2 U;3 U Turbo NAS (TS-831 XU-RP, TS-1231 XU-RP, TS-853 U-RP, TS-1253 U-RP only)

Steps to replace the power supply unit in 2U/3U Turbo NAS models.

Technical Support

Appendix A: Product Compliance Class