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QNAP TS-251+ User Manual

QNAP TS-251+
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Corresponding Source as a System Library, need not be included in conveying the object
code work.
A “User Product” is either (1) a “consumer product, which means any tangible personal
property which is normally used for personal, family, or household purposes, or (2)
anything designed or sold for incorporation into a dwelling. In determining whether a
product is a consumer product, doubtful cases shall be resolved in favor of coverage. For a
particular product received by a particular user, “normally used” refers to a typical or
common use of that class of product, regardless of the status of the particular user or of the
way in which the particular user actually uses, or expects or is expected to use, the product.
A product is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent the only
significant mode of use of the product.
“Installation Information” for a User Product means any methods, procedures,
authorization keys, or other information required to install and execute modified versions of
a covered work in that User Product from a modified version of its Corresponding Source.
The information must suffice to ensure that the continued functioning of the modified
object code is in no case prevented or interfered with solely because modification has been
made.
If you convey an object code work under this section in, or with, or specifically for use in,
a User Product, and the conveying occurs as part of a transaction in which the right of
possession and use of the User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the Corresponding Source
conveyed under this section must be accompanied by the Installation Information. But this
requirement does not apply if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has been installed in
ROM).
The requirement to provide Installation Information does not include a requirement to
continue to provide support service, warranty, or updates for a work that has been modified
or installed by the recipient, or for the User Product in which it has been modified or
installed. Access to a network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and protocols for
communication across the network.
Corresponding Source conveyed, and Installation Information provided, in accord with this

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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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