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QNAP TS-251+ User Manual

QNAP TS-251+
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10
Safety Warnings
1. The NAS can operate normally in a temperature range of 0ºC40ºC (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, 90264V).
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 manufacturers instructions.
Do NOT touch the fan inside the system to avoid serious injuries.

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QNAP TS-251+ Specifications

General IconGeneral
TypeNAS
BuzzerYes
Noise level15.4 dB
Device classHome & Home Office
Share folder512
Backup featuresCloud, USB drive, iSCSI LUN
Browser supportedApple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox
Security algorithms256-bit AES, FIPS 140-2, HTTPS, SSH
Processor cores4
Processor model-
Processor familyIntel® Celeron®
Processor frequency2 GHz
Fan voltage12 V
AC input voltage100 - 240 V
Power supply locationExternal
Power consumption (sleep)0.57 W
Power consumption (typical)18.09 W
Power consumption (HDD standby)10.56 W
Power supply unit (PSU) capacity60 W
Flash memory512 MB
Memory slots2x SODIMM
Internal memory- GB
Memory clock speed1600 MHz
Internal memory typeDDR3L
Maximum RAM supported8 GB
Wi-FiNo
Ethernet LAN data rates10, 100, 1000 Mbit/s
Supported network protocolsCIFS/SMB, AFP v3.3, NFS v3, FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)5 - 95 %
Chassis typeTower
Cooling typeActive
Fan diameter70 mm
Product colorBlack
LED indicatorsHDD, LAN, Power, Status, USB
Number of fans1 fan(s)
Cable lock slot typeKensington
Operating system version4.3
Operating system installedQNAP Turbo System
Mac operating systems supportedMac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Server operating systems supportedWindows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016
Windows operating systems supportedWindows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 7 x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64
RAID levels0, 1, JBOD
Storage drive size- \
Storage drive capacity4000 GB
Supported file systemsFAT32, HFS+, NTFS, exFAT, ext3, ext4
Installed storage drive typeHDD
Storage drive sizes supported2.5, 3.5 \
Supported storage drive typesHDD & SSD
Total installed storage capacity8 TB
Number of storage drives supported2
Supported storage drive interfacesSerial ATA II, Serial ATA III
Cables includedAC, LAN (RJ-45)
Number of screws14
Fiber ports quantity0
USB 2.0 ports quantityUSB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Number of simultaneous users4096 user(s)
Weight and Dimensions IconWeight and Dimensions
Depth219 mm
Width102 mm
Height169 mm
Weight1280 g
Package weight2320 g

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