Qnap TS-251D |
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| Specs | Value |
|---|---|
| CPU-Model | Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz) |
| CPU Architecture | 64-bit x86 |
| Graphic Processors | Intel® HD Graphics 600 |
| Floating Point Unit | YES |
| Encryption Engine | YES (AES-NI) |
| Hardware-accelerated Transcoding | YES |
| System-memory | 4 GB SO-DIMM DDR4 (1 x 4 GB) |
| Maximum Memory | 8 GB (2 x 4GB) |
| Memory Slot | 2 x SO-DIMM DDR4 |
| Flash Memory | 4GB (Dual boot OS protection) |
| HDD-bays | 2 |
| Drive Compatibility | 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives |
| Hot-swappable | YES |
| M2-slots | Optional via a QM2 PCIe adapter |
| SSD Cache Acceleration Support | YES |
| 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 |
| Jumbo Frame | YES |
| PCIe-Slot | 1 Slot 1: PCIe Gen 2 x4 |
| USB 2.0 port | 3 |
| USB 3.2 Gen 1 port | 2 |
| USB 3.2 Gen 2 (10Gbps) Port | Optional via a PCIe expansion card |
| IR Sensor | YES (Optional QNAP RM-IR004 remote control) |
| HDMI Output | 1, HDMI 2.0 |
| Form-Factor | Tower |
| LED Indicators | Power/Status, LAN, USB, HDD1-2 |
| Buttons | Power, USB copy, Reset |
| Dimensions (HxWxD) | 6.61 × 4.13 × 8.9 inch |
| Weight (Net) | 3.26 lbs |
| Weight (Gross) | 5.69 lbs |
| Operating temperature | 0 - 40 °C (32°F - 104°F) |
| Relative Humidity | 5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F) |
| Power Supply Unit | External Power Adapter, 65W, 100-240V |
| Power Consumption: HDD Sleep Mode | 8.08 W |
| Power Consumption: Operating Mode, Typical | 15.25 W |
| Fan | 1 x 70mm |
| Sound Level | 16.7 db(A) |
| System Warning | Buzzer |
| Kensington Security Slot | YES |
| File System: Internal Hard Drive | EXT4 |
| File System: External Hard Drive | EXT3, EXT4, NTFS, FAT32, HFS+, exFAT (optional license) |
| Port Trunking / Link Aggregation | YES |
| Virtual LAN (VLAN) | YES |
| Service Binding Based on Network Interfaces | YES |
| AES 256-bit Volume-based Encryption | YES |
| AES 256-bit Folder Encryption | YES |
| External Drive Encryption | YES |
| Snapshot | YES (max 1024) |
| RAID Recovery | YES |
| Online RAID Capacity Expansion | YES |
| Online RAID Level Migration | YES |
| RAID 1 | YES |
| RAID 0 | YES |
| JBOD | YES |
| Single Disk | YES |
| Global Hot Spare | YES |
| Storage Pool | YES |
| SSD Caching | YES |
| iSCSI Target | YES |
| iSCSI LUN Snapshot/Backup | YES |
| Thin-provisioned volume | YES |
| Container Station | YES |
| Virtualization Station | YES |
| Linux Station (RAM of NAS >= 4GB) | YES |
| Block-level iSCSI LUN | YES |
| Space Reclaim | YES |
| Storage Plug & Connect (iSCSI & CIFS) | YES |
| Domain Controller | YES |
| Shared Folder Level ACL Support | YES |
| Windows ACL | YES |
| LDAP Server & Client | YES |
| Real-time Remote Replication (RTRR) | YES |
| RTRR Max. Number of Jobs | 400 |
| Remote Replication (rsync) | YES |
| USB One-Touch-Copy | YES |
| External Drive Volume Label Support | NTFS |
| Apple Time Machine Support | YES |
| Alert Notification (Email, SMS) | YES |
| Wake on LAN (WOL) | YES |
| Schedule Power On/Off (15 settings) | YES |
| Qtier | YES |
| Virtual Switch | YES |
| SMB Max version | 3 |
| SNMP (v2 & v3) | YES |
| USB Printer (Max 3) | YES |
| Telnet & SSH logins (Admin only) | YES |
| Qsirch (RAM of NAS >= 2 GB) | YES |
| Syslog Server & Client | YES |
| Antivirus | YES (Optional McAfee Antivirus available) |
| Mail Server | Xeams (QPKG) |
| VPN Server (PPTP + OpenVPN + L2TP) | YES (Max clients: 100 + 100 + 100) |
| myQNAPcloud Remote Access and File Sharing | YES |
| Third- party Cloud Storage | Amazon S3/Glacier, ElephantDrive, Google Drive, Microsoft Azure |
| Mobile Apps for iOS & Android | Qfile, Qmanager, Qphoto, Qmusic, Qnotes, VMobile, Vcam, Qremote |
| Photo/Music/Video Stations | YES |
| HybridDesk Station | YES |
| DLNA Media Server, Chromecast | YES |
| Stream to Apple TV (via Qmedia App) | YES |
| QVR Pro | YES |
| Max Number of Cameras (QVR Pro) | Default: 8, Max.: 32 (optional license purchase) |
| Surveillance Station | YES |
| Max Number of Cameras (Surveillance) | Default: 2, Max.: 32 (optional license purchase) |
| Mobile Surveillance App for iOS & Android | Vmobile |
| Surveillance Local Display | YES |
| Max. Number of Concurrent Connections (CIFS) | 800 |
| Specs | Value |
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