QNAP TS-251+ 2-Bay Home and SOHO NAS Enclosure

QNAP TS-251+ 2-Bay Home and SOHO NAS Enclosure

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

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Memory (RAM)
Hardware Specifications
2.0 GHz Intel Celeron Quad-Core (burst up to 2.42 GHz)
Intel HD Graphics
TS-251+-2G: 2 GB DDR3L RAM (1 x 2 GB) Total Memory Slots: 2 x SO-DIMM
Flash Memory
512 MB
2 x 2.5" or 3.5" SATA III 6 Gb/s or SATA II 3 Gb/s HDDs or SSDs; hot swappable trays
Expansion Unit
Max. 1 (UX-800P, UX-500P)
Gigabit LAN Ports
2 x USB 3.0 (Front: 1, Rear: 1) 2 x USB 2.0 (Rear)
IR Receiver
Yes (QNAP RM-IR002 remote control)
LED Indicators
Power/Status, LAN, USB, HDD1-2
Power, Reset, USB Auto Copy
Alarm Buzzer
System warning
System Fan
1 x 7 cm, 12 VDC
Kensington Security Slot
Power Supply
External Power Adapter, 60 W, 100-240 V
Power Consumption
S3 sleep: 0.57 W HDD standby: 10.56 W In operation (typical): 18.09 W
32 to 104°F / 0 to 40°C
5~95% RH non-condensing Wet Bulb: 81°F / 27°C
Software Specifications
Operating System
QTS 4.2 (embedded Linux)
Supported Browsers
Microsoft Internet Explorer 10+ Mozilla Firefox 8+ Apple Safari 4+ Google Chrome
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
Storage Management
1. QNAP flexible Volume/LUN with thin provisioning and space reclaim 2. Supports storage pools 3. Supports snapshots (4 GB System RAM required) - Supports Volume/LUN snapshot (Max 256 snapshots) - Snapshot manager - Snapshot clone - Snapshot vault - Snapshot replica - Snapshot agent for Windows VSS and VMware 4. Online volume expansion 5. Online storage pool expansion 6. Online RAID capacity expansion and online RAID level migration 7. SMART data migration 8. Storage expansion via a QNAP UX-500P/UX-800P expansion unit 9. JBOD enclosure roaming 10. SSD read-only/read-write cache 11. Bad block scan and hard drive S.M.A.R.T. 12. Bad block recovery 13. RAID recovery 14. Bitmap support
RAID Management
RAID 0 / 1, JBOD
1. Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP 2. CIFS host access control for shared folders 3. FIPS 140-2 validated AES 256-bit volume-based and shared folder data encryption 4. AES 256-bit external drive encryption 5. Importable SSL certificates 6. Instant alert via E-mail, SMS, beep, and push notification service 7. 2-step verification
File System
1. Internal Hard Drive: EXT4 2. External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
All-in-One Server
File Server
1. File sharing across Windows, Mac, and Linux/UNIX 2. Windows ACL 3. Advanced folder permissions for CIFS/SMB, AFP, FTP 4. Shared folder aggregation (CIFS/SMB)
FTP Server
1. FTP over SSL/TLS (Explicit) 2. FXP support 3. Passive ftp port range control
Print Server
1. Max number of printers: 3 2. Supports Internet Printing Protocol 3. Print job display and management 4. IP-based and domain name-based privilege control
1. iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined) 2. Supports LUN mapping & masking 3. Online LUN capacity expansion 4. iSCSI LUN backup, one-time snapshot, and restoration 5. iSCSI connection and management by QNAP Windows Qfinder 6. Virtual disk drive (via iSCSI initiator) 7. Stack chaining master 8. Max No. of virtual disk drives: 8
VPN Server
1. Secure remote access: PPTP L2TP/IPsec & OpenVPN VPN services 2. Max number of clients: 30
VPN Client
1. Supported VPN protocols: PPTP & OpenVPN services 2. PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2 3. PPTP Encryption: None, AES 40/128 bit, AES 256 bit 4. OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit 5. Transmission package monitor 6. OpenVPN port control 7. OpenVPN link compression
Dimensions & Weight
6.63 x 4.02 x 8.86" / 168.40 x 102.11 x 225.04 mm
2.8 lb / 1.3 kg
Packaging Info
Package Weight
5.75 lb
Box Dimensions (LxWxH)
10.8 x 9.4 x 8.1"
Product Highlights
2 x 3.5" or 2.5" SATA III Drive Bays
2.0 GHz Intel Celeron Quad-Core
2 x Gigabit Ethernet Ports
2 x USB 3.0 & 2 x USB 2.0 Ports
RAID 0,1, and JBOD Support
Read & Write Speeds: up to 225 MB/s
FIPS 140-2 AES 256-Bit Encryption
QNAP HD Station & HDMI Connectivity
QTS 4.2 Operating System


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