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QNAP TS-251A User Manual

QNAP TS-251A
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To “propagate” a work means to do anything with it that, without permission, would make
you directly or secondarily liable for infringement under applicable copyright law, except
executing it on a computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the public, and in some
countries other activities as well.
To “convey” a work means any kind of propagation that enables other parties to make or
receive copies. Mere interaction with a user through a computer network, with no transfer
of a copy, is not conveying.
An interactive user interface displays “Appropriate Legal Notices” to the extent that it
includes a convenient and prominently visible feature that (1) displays an appropriate
copyright notice, and (2) tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the work under this
License, and how to view a copy of this License. If the interface presents a list of user
commands or options, such as a menu, a prominent item in the list meets this criterion.
1. Source Code.
The “source code” for a work means the preferred form of the work for making
modifications to it. “Object code” means any non-source form of a work.
A “Standard Interface” means an interface that either is an official standard defined by a
recognized standards body, or, in the case of interfaces specified for a particular
programming language, one that is widely used among developers working in that
language.
The “System Libraries” of an executable work include anything, other than the work as a
whole, that (a) is included in the normal form of packaging a Major Component, but which
is not part of that Major Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an implementation is
available to the public in source code form. A “Major Component, in this context, means a
major essential component (kernel, window system, and so on) of the specific operating
system (if any) on which the executable work runs, or a compiler used to produce the work,
or an object code interpreter used to run it.
The “Corresponding Source” for a work in object code form means all the source code
needed to generate, install, and (for an executable work) run the object code and to modify

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QNAP TS-251A Specifications

General IconGeneral
Chassis typeTower
Cooling typeActive
Fan diameter70 mm
Number of fans1 fan(s)
Cable lock slotYes
Housing material-
Cable lock slot typeKensington
RAID levels0, 1, JBOD
Storage drive size2.5/3.5 \
Storage drive capacity- GB
Supported file systemsFAT32, HFS+, NTFS, ext3, ext4
Storage drive interfaceSerial ATA III
Storage drives installedNo
Supported storage drive typesHDD & SSD
Total installed storage capacity0 TB
Number of storage drives installed0
Number of storage drives supported2
SteppingD1
Tjunction90 °C
Processor codeSR2KN
Processor cache2 MB
Processor modelN3060
System bus rate5 GT/s
Processor familyIntel® Celeron®
Processor seriesIntel Celeron N3000 series
Processor socketBGA 1170
Processor codenameBraswell
Processor frequency1.6 GHz
Processor cache typeL2
Processor lithography14 nm
Processor manufacturerIntel
Processor package size25 x 27 mm
CPU configuration (max)1
PCI Express slots version2.0
Processor boost frequency2.48 GHz
Processor operating modes64-bit
PCI Express configurations1x2+2x1, 1x4, 2x2, 4x1
Thermal Design Power (TDP)6 W
Scenario Design Power (SDP)4 W
On-board graphics card modelIntel® HD Graphics 400
Maximum internal memory supported by processor8 GB
Memory slots2 x SO-DIMM
Internal memory4 GB
Internal memory typeDDR3L
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, and SMSC
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.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity3
TypeNAS
Noise level18.3 dB
Device classHome & Home Office
Share folderWindows Server 2003, Windows Server 2003 R2, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 R2 x64, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Backup featuresCloud, iSCSI LUN
Browser supportedMicrosoft Internet Explorer 10+, Mozilla Firefox 8+, Apple Safari 4+, Google Chrome
Security algorithms256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
Compatible memory cardsSD
Processor ARK ID91832
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)5 - 95 %
Cables includedAC, LAN (RJ-45)
Number of screws14
Power supply locationExternal
Operating system version4.2
Operating system installedQNAP Turbo System
Number of execution units12
Maximum number of PCI Express lanes4
Memory types supported by processorDDR3L-SDRAM
Memory channels supported by processorDual
Intel Identity Protection Technology version1.00
Intel Small Business Advantage (SBA) version0.00
On-board graphics card base frequency320 MHz
On-board graphics card DirectX version12.0
On-board graphics card burst frequency600 MHz
Weight and Dimensions IconWeight and Dimensions
Depth219 mm
Width102 mm
Height169 mm

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