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QNAP TS-251D User Manual

QNAP TS-251D
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a. Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this
License; or
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or in the Appropriate Legal Notices displayed by works containing it; or
c. Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of
such material be marked in reasonable ways as different from the original version; or
d. Limiting the use for publicity purposes of names of licensors or authors of the material; or
e. Declining to grant rights under trademark law for use of some trade names, trademarks, or service
marks; or
f. Requiring indemnification of licensors and authors of that material by anyone who conveys the
material (or modified versions of it) with contractual assumptions of liability to the recipient, for any
liability that these contractual assumptions directly impose on those licensors and authors.
All other non-permissive additional terms are considered “further restrictions” within the meaning
of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further restriction, you may remove that term.
If a license document contains a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms of that license document,
provided that the further restriction does not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you must place, in the relevant
source files, a statement of the additional terms that apply to those files, or a notice indicating
where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the form of a separately written
license, or stated as exceptions; the above requirements apply either way.
9. Termination.
You may not propagate or modify a covered work except as expressly provided under this License. Any
attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third paragraph of section 11).
However, if you cease all violation of this License, then your license from a particular copyright holder is
reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your
license, and (b) permanently, if the copyright holder fails to notify you of the violation by some
reasonable means prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is reinstated permanently if the copyright
holder notifies you of the violation by some reasonable means, this is the first time you have received
notice of violation of this License (for any work) from that copyright holder, and you cure the violation
prior to 30 days after your receipt of the notice.
Termination of your rights under this section does not terminate the licenses of parties who have
received copies or rights from you under this License. If your rights have been terminated and not
permanently reinstated, you do not qualify to receive new licenses for the same material under section
10.
10. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or run a copy of the Program. Ancillary
propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to
receive a copy likewise does not require acceptance. However, nothing other than this License grants
you permission to propagate or modify any covered work. These actions infringe copyright if you do not
accept this License. Therefore, by modifying or propagating a covered work, you indicate your
acceptance of this License to do so.
11. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically receives a license from the original
licensors, to run, modify and propagate that work, subject to this License. You are not responsible for
enforcing compliance by third parties with this License.
TS-251D User Guide
Notices 47

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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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