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QNAP TS-251D User Manual

QNAP TS-251D
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You may convey verbatim copies of the Program's source code as you receive it, in any medium,
provided that you conspicuously and appropriately publish on each copy an appropriate copyright
notice; keep intact all notices stating that this License and any non-permissive terms added in accord
with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you convey, and you may offer support or
warranty protection for a fee.
6. Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to produce it from the Program, in
the form of source code under the terms of section 4, provided that you also meet all of these
conditions:
a. The work must carry prominent notices stating that you modified it, and giving a relevant date.
b. The work must carry prominent notices stating that it is released under this License and any
conditions added under section 7. This requirement modifies the requirement in section 4 to “keep
intact all notices”.
c. You must license the entire work, as a whole, under this License to anyone who comes into
possession of a copy. This License will therefore apply, along with any applicable section 7
additional terms, to the whole of the work, and all its parts, regardless of how they are packaged.
This License gives no permission to license the work in any other way, but it does not invalidate
such permission if you have separately received it.
d. If the work has interactive user interfaces, each must display Appropriate Legal Notices; however,
if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work
need not make them do so.
A compilation of a covered work with other separate and independent works, which are not by
their nature extensions of the covered work, and which are not combined with it such as to form a
larger program, in or on a volume of a storage or distribution medium, is called an “aggregate” if
the compilation and its resulting copyright are not used to limit the access or legal rights of the
compilation's users beyond what the individual works permit. Inclusion of a covered work in an
aggregate does not cause this License to apply to the other parts of the aggregate.
7. Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms of sections 4 and 5, provided that
you also convey the machine-readable Corresponding Source under the terms of this License, in one of
these ways:
a. Convey the object code in, or embodied in, a physical product (including a physical distribution
medium), accompanied by the Corresponding Source fixed on a durable physical medium
customarily used for software interchange.
b. Convey the object code in, or embodied in, a physical product (including a physical distribution
medium), accompanied by a written offer, valid for at least three years and valid for as long as you
offer spare parts or customer support for that product model, to give anyone who possesses the
object code either (1) a copy of the Corresponding Source for all the software in the product that
is covered by this License, on a durable physical medium customarily used for software
interchange, for a price no more than your reasonable cost of physically performing this conveying
of source, or (2) access to copy the Corresponding Source from a network server at no charge.
c. Convey individual copies of the object code with a copy of the written offer to provide the
Corresponding Source. This alternative is allowed only occasionally and noncommercially, and
only if you received the object code with such an offer, in accord with subsection 6b.
d. Convey the object code by offering access from a designated place (gratis or for a charge), and
offer equivalent access to the Corresponding Source in the same way through the same place at
no further charge. You need not require recipients to copy the Corresponding Source along with
TS-251D User Guide
Notices 45

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QNAP TS-251D Specifications

General IconGeneral
TypeNAS
Noise level16.7 dB
Device classHome & Home Office
Share folderCIFS/SMB, FTP, WebDAV
Backup featuresCloud, USB drive
Backup functionYes
Browser supportedApple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox
Security algorithms256-bit AES, FIPS 140-2, SNMPv3, SSH, SSL/TLS
Storage temperature (T-T)-20 - 70 °C
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)5 - 95 %
Chassis typeTower
Cooling typeActive
Fan diameter70 mm
Product colorWhite
LED indicatorsHDD, LAN, Power, Status, USB
Number of fans1 fan(s)
Cable lock slot typeKensington
Fiber ports quantity0
USB 2.0 ports quantity3
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Wi-FiNo
Ethernet LAN data rates1000 Mbit/s
Supported network protocolsTCP/IP, PTP, L2TP/IPSec, OpenVPN, QBelt(, FTP, SFTP, TFTP
Flash memory4000 MB
Internal memory4 GB
Memory form factorSO-DIMM
Internal memory typeDDR4
Maximum RAM supported8 GB
Cables includedAC, LAN (RJ-45)
Number of screws14
Tjunction105 °C
Processor cache4 MB
Processor modelJ4005
System bus rate- GT/s
Processor familyIntel® Celeron®
Processor socketBGA 1090
Processor codenameGemini Lake
Processor frequency2 GHz
Processor lithography14 nm
Processor manufacturerIntel
Processor package size25 x 24 mm
Processor boost frequency2.7 GHz
Processor operating modes64-bit
PCI Express configurations1x2, 1x2+2x1, 1x4, 2x1, 4x1
Thermal Design Power (TDP)10 W
On-board graphics card modelIntel® UHD Graphics 600
Fan voltage12 V
AC input voltage100 - 240 V
AC input frequency50 - 60 Hz
Power supply locationExternal
Power consumption (sleep)8.08 W
Power consumption (typical)15.25 W
Power supply unit (PSU) capacity65 W
Operating system version5.0.0
Operating system installedQNAP QTS
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 10.14 Mojave, Mac OS X 10.15 Catalina, 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 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019
Windows operating systems supportedWindows 10, Windows 7, Windows 8
RAID levels0, 1, JBOD
Storage drive size- \
Storage drive capacity0 GB
Supported file systemsFAT32, HFS+, NTFS, ext3, ext4
Storage drive interface-
Storage drive sizes supported3.5 \
Supported storage drive typesHDD & SSD
Total installed storage capacity0 TB
Supported storage drive interfacesSerial ATA II, Serial ATA III
Number of execution units12
Maximum number of PCI Express lanes6
Memory types supported by processorDDR4-SDRAM, LPDDR4-SDRAM
Intel Smart Response Technology version0.00
Intel Identity Protection Technology version1.00
On-board graphics card ID0x3185
On-board graphics card base frequency250 MHz
On-board graphics card DirectX version12.0
On-board graphics card dynamic frequency (max)700 MHz
Processor ARK ID128992
Harmonized System (HS) code84714100
Weight and Dimensions IconWeight and Dimensions
Depth226 mm
Width105 mm
Height168 mm
Weight1480 g
Package weight2580 g

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