QNAP TS-251+-8G-US Intel Celeron 2.0GHz/ 8GB RAM/ 2GbE/ 2SATA/ USB3.0/ 2-Bay Tower NAS for SOHO & Home

Specifications

• Mfr Part Number: TS-251+-8G-US
• Hardware:
  • CPU: Intel Celeron Processor (2.0GHz, Quad Core)
    
  • Graphics: Intel HD Graphics
    
  • System memory: 8GB DDR3L RAM (2x 4GB)
    
  • Maximum Memory: 8GB
    
  • Total Memory Slots: 2 SODIMM slots
    
  • Flash Memory: 512MB
    
  • Drive Bays: 2x 2.5" or 3.5" SATA 6Gb/s, 3Gb/s HDD or SSD; Hot swappable trays
    
  • LAN Port: 2x RJ45 Gigabit LAN Ports
  • USB: 2x USB 3.0 Ports (1 rear, 1 front), 2x USB 2.0 Ports (rear)
    
  • Video Output: 1x HDMI
    
  • LED Indicators: Power/Status, LAN, USB, HDD1-2
  • Buttons: Power, Reset, USB Auto Copy
  • IR Receiver
    
  • Alarm Buzzer: System warning
    
  • Sound Level: Sound pressure (LpAm) - 15.4 dB(A)
  • Operating System: QTS 4.3 (embedded Linux)
    
• Networking:
  • ​TCP/IP - Dual Stack (IPv4 & IPv6)
  • Jumbo frame (failover, multi-IP settings, port trunking, and NIC teaming)
  • Service binding based on network interfaces
    
  • Squid web caching proxy
  • Proxy client
  • DHCP client, DHCP server
  • Protocols - CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
  • UPnP & Bonjour Discovery
  • USB Wi-Fi Adapter Support
• Security:
  • 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
  • AES 256-bit external drive encryption
  • Importing of SSL certificates from Let’s Encrypt
  • Instant alerts through email, SMS, push service, audio, and LCD panel
  • 2-step verification
• ​Storage Management:
  • Storage Space Utilization monitoring
  • Flexible volumes and LUNs with thin provisioning and space reclaiming
  • Disk volume types
    • RAID 0,1, JBOD, single
  • Supports storage pools
  • Supports snapshots
    • Volume and LUN snapshots
    • Snapshot Manager
    • Snapshot cloning
    • Snapshot Vault
    • Snapshot Replica
    • Unify Snapshot Directory
    • Support for previous Windows versions (SMB)
    • Snapshot Agent for Microsoft Windows and VMware vSphere
  • Online volume expansion
  • Online storage pool expansion
  • Online RAID capacity expansion and online RAID level migration
  • SMART data migration
  • Storage expansion through QNAP expansion units (UX-500P and UX-800P)
  • JBOD enclosure roaming
  • SSD read-only/read-write cache
    • The cache size depends on the total memory
    • Bad block scan and hard drive S.M.A.R.T.
    • Bad block recovery & RAID recovery
    • Bitmap support
• File System: 
  • ​Internal hard drive: EXT4
    
  • External hard drive: EXT3, EXT4, NTFS, FAT32, HFS+, and exFAT
• Form Factor: Tower
• Fan: 1 x 7cm, 12V DC
  
• Power Consumption:
  • System Sleep Mode: 0.57W
  • HDD standby: 10.56W
    
  • In Operation: 18.09W
• ​Power Supply: 60W External Power adapter, 100-240V
• Dimensions (WxDxH): 4.02 x 8.62 x 6.65 inch / 102.0 x 219.0 x 169.0 mm
• Weight: 2.82 lbs / 1.28 kg