QNAP TS-251A 2-Bay NAS Enclosure

QNAP TS-251A 2-Bay NAS Enclosure

Brand QNAP
Model TS-251A-2G-US

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14 nm 1.6 GHz Intel Celeron N3060 dual-core (up to 2.48 GHz)
AES-NI hardware encryption acceleration 1 x Kensington security slot
System Memory
2 GB DDR3L (2 x 1 GB) Max Memory: 8 GB Memory Slots: 2 x SODIMM DDR3L (identical DDR3L modules for dual-DIMM configurations)
Flash Memory
4 GB pre-loaded with QTS system
Drives Supported
2 x 3.5"/2.5" SATA 6 Gb/s HDDs or SSDs
2 x Gigabit Ethernet ports
3 x USB 3.0 Type-A ports (Front: 1, Rear: 2) 1 x USB 3.0 micro-B port (QuickAccess) 1 x HDMI 1 x 3.5 mm microphone jack 1 x 3.5 mm line-out jack 1 x system maintenance port
Card Reader
Supported Resolution
Up to 3840 x 2160 @ 30 Hz
LED Indicators
Status/Power, USB, HDD 1, HDD 2
Power/Status, USB one-touch backup, and reset buttons
IR Receiver
Yes, supports QNAP RM-IR002 and MCE-compliant remote controls
Noise Level
18.3 dBA
Power Consumption
System sleep: 0.72 W HDD standby: 7.9 W In operation: 16.2 W (with 2 x 2 TB HDDs)
100 to 240 VAC, 65 W AC power adapter
1 x 70 mm fan (12 VDC)
Operating Temperature
32 to 104°F / 0 to 40°C
5 to 95% RH (non-condensing)
Operating System
QTS 4.2 (embedded Linux)
Client OS Support
Windows 7, Windows 8, Windows 10 Windows Server 2003, 2008 R2, 2012, 2012 R2 Mac OS X Linux and UNIX
Supported Browsers
Microsoft Internet Explorer 10+, Google Chrome, Apple Safari 7+, Mozilla Firefox
Multilingual Support
Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
File System Support
Internal Hard Drive: EXT4 External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
TCP/IP (IPv4 & IPv6: Dual Stack)1 Dual Gigabit NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming) Service binding based on network interfaces Squid Proxy server & Proxy client Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC UPnP & Bonjour Discovery
Security Support
Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP CIFS host access control for shared folders FIPS 140-2 validated AES 256-bit volume-based and shared folder data encryption 2 Importable SSL certificates Instant alerts via email, SMS, beep, and push service 2-step verification
Storage Management
QNAP flexible Volume/LUN with thin provisioning and space reclaim Disk volume types: RAID 0, 1, JBOD, single Supports volume/LUN snapshots, up to 256 per system (4 GB System RAM required) SSD read-only/read-write cache
Power Management
Wake on LAN Scheduled power on/off Automatic power on after power recovery USB and network UPS support with SNMP management System sleep mode (S3)
iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined) Supports LUN mapping & masking Online LUN capacity expansion Support for SPC-3 persistent reservation Supports MPIO & MC/S iSCSI LUN backup, one-time snapshot, and restoration iSCSI connection and management by QNAP Windows Qfinder Virtual disk drive (via iSCSI initiator) Stack chaining master Max No. of virtual disk drives: 8
Dimensions (H x W x D)
6.7 x 4 x 8.6" / 16.9 x 10.2 x 21.9 cm
2.9 lb / 1.3 kg
Packaging Info
Package Weight
5.85 lb
Box Dimensions (LxWxH)
12.6 x 9.9 x 4.5"
Product Highlights
2 x 2.5"/3.5" SATA III Drive Bays
1.6 GHz Intel Celeron N3060 Dual-Core
2 x Gigabit Ethernet Ports
1 x USB 3.0 Micro-B, 3 x USB 3.0 Ports
HDMI and Audio Ports
RAID 0, 1, JBOD, Single
Up to 211.88 MB/s Throughput
AES 256-Bit Volume Encryption
QTS 4.2 Operating System


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