QNAP TS-251+ Ethernet LAN Tower Grey NAS

Total installed storage capacity

12 TB

Storage drives installed

Yes

Installed storage drive type

HDD

Number of storage drives installed

2

Supported storage drive types

HDD & SSD

Number of storage drives supported

2

Storage drive interface

Serial ATA II- Serial ATA III

Storage drive capacity

6000 GB

Storage drive size

2.5/3.5"

Hot-swap drive bays

Yes

RAID support

Yes

Supported file systems

FAT32-HFS+-NTFS-ext3-ext4

RAID levels

0-1-JBOD

Processor frequency

2 GHz

Processor family

Intel® Celeron®

Processor cores

4

Internal memory type

DDR3L

Internal memory

2 GB

Maximum RAM supported

8 GB

Memory slots

2

Flash memory

512 MB

Ethernet LAN

Yes

Ethernet LAN data rates

10-100-1000 Mbit/s

Wi-Fi

No

Wake-on-LAN ready

Yes

iSCSI support

Yes

DHCP server

Yes

DHCP client

Yes

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity

2

USB 2.0 ports quantity

2

HDMI ports quantity

1

Ethernet LAN (RJ-45) ports

2

RAID support

Yes

Supported file systems

FAT32-HFS+-NTFS-ext3-ext4

RAID levels

0-1-JBOD

Cooling type

Active

Fan diameter

7 cm

Cable lock slot type

Kensington

Product colour

Grey

Number of fans

1 fan(s)

LED indicators

HDD- LAN- Power- Status- USB

Chassis type

Tower

Cable lock slot

Yes

Type

NAS

Device class

Home & Home Office

Backup function

Yes

Product colour

Grey

Multilingual support

Yes

LED indicators

HDD- LAN- Power- Status- USB

Chassis type

Tower

Buzzer

Yes

Number of fans

1 fan(s)

Built-in iTunes server

Yes

Built-in FTP server

Yes

S.M.A.R.T. support

Yes

Type

NAS

Device class

Home & Home Office

Backup function

Yes

On/off switch

Yes

Windows operating systems supported

Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 7 Home Basic-Windows 7 Home Basic x64-Windows 7 Home Premium-Windows 7 Home Premium x64-Windows 7 Professional-Windows 7 Professional x64-Windows 7 Starter-Windows 7 Starter x64-Windows 7 Ultimate-Windows 7 Ultimate x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64

Server operating systems supported

Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2

Mac operating systems supported

Mac OS X 10.0 Cheetah- Mac OS X 10.1 Puma- Mac OS X 10.10 Yosemite- Mac OS X 10.11 El Capitan- Mac OS X 10.2 Jaguar- Mac OS X 10.3 Panther- Mac OS X 10.4 Tiger- Mac OS X 10.5 Leopard- Mac OS X 10.6 Snow Leopard- 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

Reset button

Yes

Operating system version

4.2

Operating system installed

QNAP Turbo System

Multilingual support

Yes

Buzzer

Yes

Access Control List (ACL)

Yes

Cooling type

Active

Fan diameter

7 cm

Fan voltage

12 V

Number of fans

1 fan(s)

Cable lock slot type

Kensington

Cable lock slot

Yes

Access Control List (ACL)

Yes

Windows operating systems supported

Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 7 Home Basic-Windows 7 Home Basic x64-Windows 7 Home Premium-Windows 7 Home Premium x64-Windows 7 Professional-Windows 7 Professional x64-Windows 7 Starter-Windows 7 Starter x64-Windows 7 Ultimate-Windows 7 Ultimate x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64

Server operating systems supported

Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2

Mac operating systems supported

Mac OS X 10.0 Cheetah- Mac OS X 10.1 Puma- Mac OS X 10.10 Yosemite- Mac OS X 10.11 El Capitan- Mac OS X 10.2 Jaguar- Mac OS X 10.3 Panther- Mac OS X 10.4 Tiger- Mac OS X 10.5 Leopard- Mac OS X 10.6 Snow Leopard- 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

4.2

Operating system installed

QNAP Turbo System

On/off switch

Yes

Web-based management

Yes

Reset button

Yes

Power supply location

External

Power supply unit (PSU) capacity

60 W

Fan voltage

12 V

AC input voltage

100-240 V

External power adapter

Yes

Width

102 mm

Depth

225 mm

Height

168.5 mm

Quick installation guide

Yes

External power adapter

Yes

Cables included

AC- LAN (RJ-45)

Windows operating systems supported

Windows 7 Enterprise-Windows 7 Enterprise x64-Windows 7 Home Basic-Windows 7 Home Basic x64-Windows 7 Home Premium-Windows 7 Home Premium x64-Windows 7 Professional-Windows 7 Professional x64-Windows 7 Starter-Windows 7 Starter x64-Windows 7 Ultimate-Windows 7 Ultimate x64-Windows 8-Windows 8 Enterprise-Windows 8 Enterprise x64-Windows 8 Pro-Windows 8 Pro x64-Windows 8 x64

Server operating systems supported

Windows Server 2003-Windows Server 2008 R2-Windows Server 2012-Windows Server 2012 R2

Mac operating systems supported

Mac OS X 10.0 Cheetah- Mac OS X 10.1 Puma- Mac OS X 10.10 Yosemite- Mac OS X 10.11 El Capitan- Mac OS X 10.2 Jaguar- Mac OS X 10.3 Panther- Mac OS X 10.4 Tiger- Mac OS X 10.5 Leopard- Mac OS X 10.6 Snow Leopard- 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 temperature (T-T)

0 - 40 °C

Operating relative humidity (H-H)

5 - 95%

Cables included

AC- LAN (RJ-45)