Specifications
- Mfr Part Number: TS-251D-4G-US
- Hardware:
- CPU: Intel Celeron J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz)
- Encryption Acceleration
- System Memory: 4 GB SO-DIMM DDR4 (1 x 4 GB)
- Maximum Memory: 8GB (2x 4GB)
- Memory Slot: 2 x SO-DIMM DDR4
- Flash Memory: 4GB (Dual boot OS protection)
- Drive Bay: 2 x 3.5-inch SATA 6Gb/s, 3Gb/s
- Gigabit Ethernet Port (RJ45): 1
- 5 Gigabit Ethernet Port (5G/2.5G/1G/100M): Expandable with an optional PCIe adapter
- 10 Gigabit Ethernet Port: Expandable with an optional PCIe adapter
- USB Port: 3x USB 2.0 Ports, 2x USB 3.2 Gen 1 port
- PCIe Slot: Slot 1: PCIe Gen 2 x4
- LED Indicator: Status/Power, LAN, USB, HDD 1-2
- Button: Power, Reset, USB copy
- System Warning: Buzzer
- Operating System: QTS 4.4.1 (embedded Linux)
- Network & Virtual Switch:
- TCP/IP: Dual stack (IPv4 and IPv6)
- Jumbo frame
- Port trunking（Link aggregation）
- failover
- Load balancing
- DHCP server and client
- RADVD
- USB Wi-Fi adapter Note: This feature does not support ad hoc networks because of security considerations.
- Virtual switch
- Network Address Translation (NAT)
- Spanning Tree Protocol (STP)
- Thunderbolt to Ethernet converter (T2E)
- Software-Defined Switch mode
- Static Route
- NCSI (Network Connectivity Status Indicator)
- DDNS settings (Customize & Multiple Service)
- Security:
- Network access protection with auto-blocking – SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
- Host access control for shared folders (CIFS/SMB)
- AES 256-bit folder-based and volume-based encryptions which are validated by FIPS 140-2 CAVP (Cryptographic Algorithm Validation Program)
- 256-bit external drive encryption
- Importable SSL certiï¬cates
- Instant alert via E-mail, SMS, beep, and push service
- 2-step veriï¬cation
- Storage Management:
- Supported RAID types: RAID 0, 1, JBOD, Single
- RAID Hot Spare and Global Hot Spare
- RAID Rebuild Speed Customization
- Online RAID capacity expansion
- Online RAID level migration
- SSD RAID Over-provisioning Note: RAID 0 and JBOD Data RAID does not support Over-provisioning.
- SSD RAID Performance evaluation (with SSD Profiling Tool)
- SSD TRIM for RAID 0,1
- Bitmap support
- Disk auto S.M.A.R.T. data migration
- Disk bad block scan and S.M.A.R.T test.
- Disk bad block recovery
- Disk secure data erase
- Ironwolf Health Management
- Storage pools
- Qtier Data Tiering Technology
- Automatic or scheduled data tiering
- IO-aware auto tiering
- Shared folder tiering on demand
- Flexible volumes and LUNs with thin provisioning and space reclaiming
- If the NAS has less than 4GB RAM, then the maximum volume capacity is 144TB.
- If the NAS has at least 4GB RAM, then the maximum volume capacity is 250TB.
- Online volume expansion
- Volume type conversion
- Volume shrink
- Storage space utilization
- Snapshots
- Volume and LUN snapshots
- Snapshot Dashboard
- Snapshot Manager
- Snapshot local restore and revert
- Snapshot Clone
- Snapshot Replica and Snapshot Vault
- Snapshot remote restore and revert
- Unified Snapshot Directory
- Support for Windows Previous Versions (CIFS/SMB)
- Snapshot Agent for Microsoft Windows and VMware vSphere
- Storage expansion using QNAP expansion units J
- BOD enclosure roaming
- SSD read-only and read-write cache
- SSD write-only cache
- File System:
- Internal HDD: EXT4
- External HDD: EXT3, EXT4, NTFS, FAT32, HFS+, exFAT
- Form Factor: Tower
- Security Slot: Kensington security slot
- Fan: 1 x 70mm
- Power Supply Unit: External Power Adapter, 65W, 100-240V
- Dimensions (WxDxH): 4.13 x 8.90 x 6.61 inch
- Weight: 3.26 lbs
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