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Storage
Online RAID migration
Yes
Online RAID expansion
Yes
Storage drives installed
No
Installed storage drive type
No
Supported storage drive types
HDD & SSD
Number of storage drives supported
2
Hot-swap drive bays
Yes
RAID support
Yes
Supported file systems
FAT32-HFS+-NTFS-ext3-ext4
RAID levels
0-1-JBOD
Supported storage drive interfaces
Serial ATA III
Storage drive sizes supported
3.5"
Number of M.2 (M & B) slots
1
RAID rebuild
Yes
Processor
Processor manufacturer
Intel
Tjunction
105 °C
Thermal Design Power (TDP)
10 W
Processor threads
2
Processor socket
BGA 1090
Processor package size
25 x 24 mm
Processor operating modes
64-bit
Processor lithography
14 nm
Processor codename
Gemini Lake
Processor cache
4 MB
Processor boost frequency
2.7 GHz
PCI Express slots version
2.0
PCI Express configurations
1x2-1x2+2x1-1x4-2x1-4x1
On-board graphics adapter model
Intel® UHD Graphics 600
CPU configuration (max)
1
Maximum internal memory supported by processor
8 GB
Conflict-Free processor
Yes
Processor ARK ID
128992
Processor frequency
2 GHz
Processor family
Intel® Celeron®
Processor model
J4005
Processor cores
2
Memory
Internal memory type
DDR4
Internal memory
2 GB
Maximum RAM supported
8 GB
Memory slots
2
Flash memory
4000 MB
Memory form factor
SO-DIMM
Network
Link aggregation
Yes
Ethernet LAN
Yes
Ethernet LAN data rates
1000 Mbit/s
Wi-Fi
No
Wake-on-LAN ready
Yes
Supported network protocols
TCP/IP- PTP- L2TP/IPSec- OpenVPN- QBelt(- FTP- SFTP- TFTP
Jumbo frames support
Yes
iSCSI support
Yes
DHCP server
Yes
DHCP client
Yes
WLAN adapter supported
Yes
Ports & interfaces
USB port
Yes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity
2
HDMI version
2.0
USB 2.0 ports quantity
3
HDMI ports quantity
1
Ethernet LAN (RJ-45) ports
1
Hard drive
RAID support
Yes
Supported file systems
FAT32-HFS+-NTFS-ext3-ext4
RAID levels
0-1-JBOD
Graphics
On-board graphics adapter model
Intel® UHD Graphics 600
On-board graphics adapter ID
0x3185
On-board graphics adapter dynamic frequency (max)
700 MHz
On-board graphics adapter DirectX version
12.0
On-board graphics adapter burst frequency
700 MHz
On-board graphics adapter base frequency
250 MHz
Maximum on-board graphics adapter memory
8 GB
Number of displays supported (on-board graphics)
3
Design
Cooling type
Active
Fan diameter
7 cm
Cable lock slot type
Kensington
Product colour
White
Number of fans
1 fan(s)
LED indicators
HDD- LAN- Power- Status- USB
Chassis type
Tower
Cable lock slot
Yes
Technical details
Type
NAS
Device class
Home & Home Office
Backup function
Yes
Backup features
Cloud
Product colour
White
Noise level
16.7 dB
Multilingual support
Yes
LED indicators
HDD- LAN- Power- Status- USB
Chassis type
Tower
Buzzer
Yes
Number of fans
1 fan(s)
Performance
Built-in FTP server
Yes
System log
Yes
Share folder
CIFS/SMB
S.M.A.R.T. support
Yes
Hot spare
Yes
Browser supported
Apple Safari 7+- Google Chrome- Microsoft Internet Explorer 10+- Mozilla Firefox
Type
NAS
Device class
Home & Home Office
Backup function
Yes
Backup features
Cloud
On/off switch
Yes
Windows operating systems supported
Windows 10-Windows 7-Windows 8
Server operating systems supported
Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016-Windows Server 2019
Mac operating systems supported
Mac 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
Linux operating systems supported
Yes
Web-based management
Yes
Security algorithms
256-bit AES-FIPS 140-2-HTTPS-SNMPv3-SSH-SSL/TLS
Reset button
Yes
Operating system version
4.4.1
Operating system installed
QNAP Turbo System
Noise level
16.7 dB
Multilingual support
Yes
Buzzer
Yes
Access Control List (ACL)
Yes
Third-party support
Yes
Snapshot
Yes
USB copy function
Yes
Cooling
Cooling type
Active
Fan diameter
7 cm
Number of fans
1 fan(s)
Security
Cable lock slot type
Kensington
Security algorithms
256-bit AES-FIPS 140-2-HTTPS-SNMPv3-SSH-SSL/TLS
Cable lock slot
Yes
Access Control List (ACL)
Yes
Software
Windows operating systems supported
Windows 10-Windows 7-Windows 8
Server operating systems supported
Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016-Windows Server 2019
Mac operating systems supported
Mac 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
Linux operating systems supported
Yes
Operating system version
4.4.1
Operating system installed
QNAP Turbo System
Management features
On/off switch
Yes
Web-based management
Yes
Reset button
Yes
Power
Power supply location
External
Power supply unit (PSU) capacity
65 W
AC input voltage
100 - 240 V
Power consumption (typical)
15.25 W
Power consumption (sleep)
8.08 W
Number of power supply units
1
External power adapter
Yes
Weight & dimensions
Width
105 mm
Depth
226 mm
Height
168 mm
Weight
1.48 kg
Package weight
2.58 kg
Packaging content
Quick installation guide
Yes
External power adapter
Yes
Cables included
AC- LAN (RJ-45)
Processor special features
UART
Yes
Thermal Monitoring Technologies
Yes
Number of execution units
12
Maximum number of PCI Express lanes
6
Intel® Turbo Boost Technology
No
Intel® Smart Response Technology
No
Intel® Secure Key
Yes
Intel® Quick Sync Video Technology
Yes
Intel® OS Guard
Yes
Intel® Identity Protection Technology (Intel® IPT)
Yes
Intel® Hyper Threading Technology (Intel® HT Technology)
No
Intel® Anti-Theft Technology (Intel® AT)
No
Intel® AES New Instructions (Intel® AES-NI)
Yes
Intel VT-x with Extended Page Tables (EPT)
Yes
Intel Virtualization Technology for Directed I/O (VT-d)
Yes
Intel Virtualization Technology (VT-x)
Yes
Intel Smart Response Technology version
0.00
Intel Secure Key Technology version
1.00
Intel Identity Protection Technology version
1.00
Intel Enhanced Halt State
Yes
Intel 64
Yes
Idle States
Yes
Execute Disable Bit
Yes
Enhanced Intel SpeedStep Technology
Yes
Embedded options available
No
Memory types supported by processor
DDR4-SDRAM-LPDDR4-SDRAM
System requirements
Windows operating systems supported
Windows 10-Windows 7-Windows 8
Server operating systems supported
Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2-Windows Server 2016-Windows Server 2019
Mac operating systems supported
Mac 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
Linux operating systems supported
Yes
Operational conditions
Operating temperature (T-T)
0 - 40 °C
Operating relative humidity (H-H)
5 - 95%
Packaging data
Package weight
2.58 kg
Cables included
AC- LAN (RJ-45)
Other features
Processor ARK ID
128992
QNAP TS-251D J4005 Ethernet LAN Tower White NAS
| Length | 22.60 in |
| Width | 10.50 in |
| Height | 16.80 in |
| Weight | 1.480000 lbs |
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