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QNAP TS-251B User Manual

QNAP TS-251B
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the object code. If the place to copy the object code is a network server, the Corresponding
Source may be on a different server (operated by you or a third party) that supports equivalent
copying facilities, provided you maintain clear directions next to the object code saying where to
find the Corresponding Source. Regardless of what server hosts the Corresponding Source, you
remain obligated to ensure that it is available for as long as needed to satisfy these requirements.
e. Convey the object code using peer-to-peer transmission, provided you inform other peers where
the object code and Corresponding Source of the work are being offered to the general public at
no charge under subsection 6d.
A separable portion of the object code, whose source code is excluded from the 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 section
must be in a format that is publicly documented (and with an implementation available to the
public in source code form), and must require no special password or key for unpacking, reading
or copying.
8. Additional Terms.
“Additional permissions” are terms that supplement the terms of this License by making exceptions
from one or more of its conditions. Additional permissions that are applicable to the entire Program
shall be treated as though they were included in this License, to the extent that they are valid under
applicable law. If additional permissions apply only to part of the Program, that part may be used
separately under those permissions, but the entire Program remains governed by this License without
regard to the additional permissions.
When you convey a copy of a covered work, you may at your option remove any additional permissions
from that copy, or from any part of it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place additional permissions on material,
added by you to a covered work, for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you add to a covered work, you may (if
authorized by the copyright holders of that material) supplement the terms of this License with terms:
TS-251B User Guide
Notices 49

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QNAP TS-251B Specifications

General IconGeneral
RAID levels0, 1, JBOD
RAID supportYes
Storage drive size- \
Storage drive capacity- GB
Supported file systemsFAT32, HFS+, NTFS, exFAT, ext3, ext4
Storage drive interfaceSerial ATA III
Storage drives installedNo
Storage drive sizes supported2.5, 3.5 \
Supported storage drive typesHDD & SSD
Total installed storage capacity0 TB
Number of storage drives installed0
Number of storage drives supported2
SteppingB1
Tjunction105 °C
Processor codeSR2Z8
Processor cache2 MB
System bus rate5 GT/s
Processor familyIntel® Celeron®
Processor socketBGA 1296
Processor codenameApollo Lake
Processor frequency2 GHz
Processor cache typeSmart Cache
Processor lithography14 nm
Processor manufacturerIntel
Processor package size24 x 31 mm
CPU configuration (max)1
PCI Express slots version2.0
Processor boost frequency2.5 GHz
Processor operating modes64-bit
PCI Express configurations1x2+2x1, 4x1
Thermal Design Power (TDP)10 W
On-board graphics card modelIntel® HD Graphics 500
Maximum internal memory supported by processor8 GB
Flash memory4096 MB
Internal memory2 GB
Internal memory typeDDR3L
Ethernet LAN data rates10, 100, 1000 Mbit/s
Supported network protocolsPPTP, L2TP/IPSec, OpenVPN
HDMI version1.4b
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.
Chassis typeTower
Cooling typeActive
Fan diameter70 mm
Product colorWhite
LED indicatorsHDD, LAN, Power, Status, USB
Number of fans1 fan(s)
Cable lock slot typeKensington
TypeNAS
Noise level17.3 dB
Device classHome & Home Office
Share folderCIFS/SMB
Backup featuresUSB drive
Browser supportedApple Safari 7 or later, Google Chrome, Microsoft Internet Explorer 10 or later, Mozilla Firefox
Security algorithms256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLS
AC input voltage100 - 240 V
Power supply locationExternal
Power consumption (typical)15.25 W
Power consumption (HDD standby)8.08 W
Power supply unit (PSU) capacity65 W
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)5 - 95 %
Operating system version4.3.4
Operating system installedQNAP Turbo System
Mac operating systems supportedMac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac 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 2003 x64, Windows Server 2008 R2, Windows Server 2008 R2 x64, Windows Server 2012, Windows Server 2012 R2, Windows Server 2012 R2 x64, Windows Server 2012 x64, Windows Server 2016, Windows Server 2016 x64
Windows operating systems supportedWindows 10, Windows 7, Windows 8
Cables includedAC, LAN (RJ-45)
Number of execution units12
Maximum number of PCI Express lanes6
Memory types supported by processorDDR3L, LPDDR3-SDRAM, LPDDR4-SDRAM
Memory channels supported by processorDual
Intel Identity Protection Technology version1.00
Intel Small Business Advantage (SBA) version0.00
On-board graphics card base frequency250 MHz
On-board graphics card burst frequency700 MHz
Number of displays supported (on-board graphics)3
Processor ARK ID95597
Weight and Dimensions IconWeight and Dimensions
Depth226 mm
Width105 mm
Height168 mm
Weight1530 g

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