TS-251B-2G-20TB-ULTRA

Two‑bay NAS with Intel Celeron J3355, 2 GB DDR3L, up to 20 TB total storage, active cooling, HDMI output, USB backup drive slot, RAID0/1/JBOD, iSCSI, SMB/CIFS, AES‑256 encryption and Wake‑On‑LAN.

Brand: QNAP
Model: TS-251B-2G/20TB-ULTRA
MPN: TS-251B-2G/20TB-ULTRA
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AC input voltage 100 - 240 V
Backup features USB drive
Backup function Yes
Bad block scan Yes
Browser supported Apple Safari 7 or later, Google Chrome, Microsoft Internet Explorer 10 or later, Mozilla Firefox
Built-in display No
Built-in FTP server Yes
Built-in iTunes server Yes
Buzzer Yes
Cable lock slot Yes
Cable lock slot type Kensington
Cables included AC,LAN (RJ-45)
Chassis type Tower
Cooling type Active
Depth 226 mm
Device class Home & Home Office
DHCP Client Yes
DHCP server Yes
ECC supported by processor No
Embedded options available No
Enhanced intel speedstep technology Yes
Ethernet LAN Yes
Ethernet LAN data rates 10,100,1000 Mbit/s
Execute disable bit Yes
External power adapter Yes
Fan diameter 7 cm
Flash memory 4096 MB
HDMI ports quantity 1
Height 168 mm
Hot spare Yes
Hot-swap drive bays Yes
Idle states Yes
Installed storage drive type HDD
Intel 64 Yes
Intel clear video technology Yes
Intel enhanced halt state Yes
Intel rapid storage technology No
Intel secure boot Yes
Intel smart connect technology No
Intel trusted execution technology No
Internal memory 2 GB
Internal memory type DDR3L
iSCSI support Yes
Jumbo frames support Yes
LED indicators HDD,LAN,Power,Status,USB
Linux operating systems supported Yes
Management protocols SNMP
Maximum internal memory supported by processor 8 GB
Maximum number of PCI Express lanes 6
Memory channels supported by processor Dual
Memory types supported by processor DDR3L,LPDDR3-SDRAM,LPDDR4-SDRAM
Microphone in Yes
Multilingual support Yes
Noise level 17.3 dB
On-board graphics adapter base frequency 250 MHz
On-board graphics adapter burst frequency 700 MHz
On-board graphics adapter model Intel® HD Graphics 500
On/off switch Yes
Operating system installed QNAP Turbo System
Operating system version 4.3.4
PCI Express configurations 1x2+2x1,4x1
PCI Express slots version 2.0
Power supply location External
Processor ARK ID 95597
Processor cache type Smart Cache
Processor code SR2Z8
Processor codename Apollo Lake
Processor family Intel® Celeron®
Processor frequency 2.00 GHz
Processor lithography 14 nm
Processor model J3355
Processor operating modes 64-bit
Processor package size 24 x 31 mm
Processor socket BGA 1296
Quick installation guide Yes
RAID levels 0,1,JBOD
RAID support Yes
Reset button Yes
Security algorithms 256-bit AES,FIPS 140-2,HTTPS,SSH,SSL/TLS
Share folder CIFS/SMB
Share folder access right management Yes
Storage drive sizes supported 2.5,3.5"
Storage drives installed Yes
Supported file systems FAT32,HFS+,NTFS,exFAT,ext3,ext4
Supported storage drive interfaces Serial ATA III
Supported storage drive types HDD,SSD
System bus rate 5 GT/s
System log Yes
Thermal monitoring technologies Yes
Tjunction 105 °C
Type NAS
UART Yes
USB port Yes
Wake-on-LAN ready Yes
Wi-Fi No
Windows operating systems supported Windows 10,Windows 7,Windows 8