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QNAP TS-251D User Manual

QNAP TS-251D
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If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the
conditions of this License, they do not excuse you from the conditions of this License. If you cannot
convey a covered work so as to satisfy simultaneously your obligations under this License and any
other pertinent obligations, then as a consequence you may not convey it at all. For example, if you
agree to terms that obligate you to collect a royalty for further conveying from those to whom you
convey the Program, the only way you could satisfy both those terms and this License would be to
refrain entirely from conveying the Program.
14. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have permission to link or combine any
covered work with a work licensed under version 3 of the GNU Affero General Public License into a
single combined work, and to convey the resulting work. The terms of this License will continue to apply
to the part which is the covered work, but the special requirements of the GNU Affero General Public
License, section 13, concerning interaction through a network will apply to the combination as such.
15. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of the GNU General Public
License from time to time. Such new versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program specifies that a certain numbered
version of the GNU General Public License “or any later version” applies to it, you have the option of
following the terms and conditions either of that numbered version or of any later version published by
the Free Software Foundation. If the Program does not specify a version number of the GNU General
Public License, you may choose any version ever published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future versions of the GNU General Public
License can be used, that proxy's public statement of acceptance of a version permanently authorizes
you to choose that version for the Program.
Later license versions may give you additional or different permissions. However, no additional
obligations are imposed on any author or copyright holder as a result of your choosing to follow a later
version.
16. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
17. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR
DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES
OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
18. Interpretation of Sections 16 and 17.
If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect
according to their terms, reviewing courts shall apply local law that most closely approximates an
absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of
liability accompanies a copy of the Program in return for a fee.
TS-251D User Guide
Notices 49

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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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