TS-251B-4G
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| Identifiers | |
|---|---|
| Model | QNAP TS-251B-4G/20TB-ULTRA |
| MPN | QNAP TS-251B-4G/20TB-ULTRA |
| Dimensions / Weight | |
| Key Features | |
| 3.5 mm out | Yes |
| AC input voltage | 100 - 240 V |
| Access Control List ACL | Yes |
| Backup features | USB drive |
| Backup function | Yes |
| Bad block scan | Yes |
| Browser supported | Apple Safari 7 or later, Google Chrome, Microsoft Internet Explorer 10 or later, Mozilla Firefox |
| Built-in display | No |
| Built-in FTP server | Yes |
| Built-in iTunes server | Yes |
| Built-in speakers | Yes |
| Builtin speakers | 1 |
| Buzzer | Yes |
| Cable lock slot | Yes |
| Cable Lock Slot | Yes |
| Cable lock slot type | Kensington |
| Cables included | AC,LAN (RJ-45) |
| Chassis type | Tower |
| Colour | White |
| Conflict free processor | Yes |
| Cooling type | Active |
| Depth | 226 mm |
| Device class | Home & Home Office |
| DHCP client | Yes |
| DHCP Client | Yes |
| DHCP server | Yes |
| Dynamic DNS DDNS | Yes |
| ECC supported by processor | No |
| Embedded options available | No |
| Enhanced intel speedstep technology | Yes |
| Ethernet LAN | Yes |
| Ethernet LAN data rates | 10,100,1000 Mbit/s |
| Execute disable bit | Yes |
| Execution units | 12 |
| External power adapter | Yes |
| Fan diameter | 7 cm |
| Flash memory | 4096 MB |
| Height | 168 mm |
| Hot spare | Yes |
| Hot-swap drive bays | Yes |
| Idle states | Yes |
| Installed storage drive type | HDD |
| Intel 64 | Yes |
| Intel clear video technology | Yes |
| Intel enhanced halt state | Yes |
| Intel rapid storage technology | No |
| Intel secure boot | Yes |
| Intel Secure Boot | Yes |
| Intel smart connect technology | No |
| Intel Stable Image Platform Program | No |
| Intel trusted execution technology | No |
| Intel Virtualization Technology | Yes |
| Intel Virtualization Technology for Directed I/O | Yes |
| Intel VT-x with Extended Page Tables | Yes |
| Intel® AES New instructions | Yes |
| Intel® Anti-Theft Technology | No |
| Intel® Clear Video HD Technology | Yes |
| Intel® Clear Video Technology for Mobile Internet Devices | Yes |
| Intel® High Definition Audio | Yes |
| Intel® Hyper Threading Technology | No |
| Intel® Identity Protection Technology | Yes |
| Intel® Insider™ | No |
| Intel® InTru™ 3D Technology | No |
| Intel® OS Guard | No |
| Intel® Quick Sync Video Technology | Yes |
| Intel® Secure Key | Yes |
| Intel® Small Business Advantage | No |
| Intel® Smart Response Technology | No |
| Intel® Turbo Boost Technology | No |
| Intel® Wireless Display | No |
| Internal memory | 4 GB |
| Internal memory type | DDR3L |
| iSCSI support | Yes |
| Jumbo frames support | Yes |
| LED indicators | HDD,LAN,Power,Status,USB |
| Linux operating systems supported | Yes |
| Management protocols | SNMP |
| Maximum internal memory supported by processor | 8 GB |
| Maximum number of PCI Express lanes | 6 |
| Memory channels supported by processor | Dual |
| Memory slots | 2 |
| Memory types supported by processor | DDR3L,LPDDR3-SDRAM,LPDDR4-SDRAM |
| Microphone in | Yes |
| Multilingual support | Yes |
| Noise level | 17.3 dB |
| On-board graphics adapter base frequency | 250 MHz |
| On-board graphics adapter burst frequency | 700 MHz |
| On-board graphics adapter model | Intel® HD Graphics 500 |
| On/off switch | Yes |
| Operating system installed | QNAP Turbo System |
| Operating system version | 4.3.4 |
| PCI Express configurations | 1x2+2x1,4x1 |
| PCI Express slots version | 2.0 |
| Power supply location | External |
| Power supply unit PSU capacity | 65 W |
| Processor ARK ID | 95597 |
| Processor cache type | Smart Cache |
| Processor code | SR2Z8 |
| Processor codename | Apollo Lake |
| Processor family | Intel® Celeron® |
| Processor frequency | 2.00 GHz |
| Processor lithography | 14 nm |
| Processor model | J3355 |
| Processor operating modes | 64-bit |
| Processor package size | 24 x 31 mm |
| Processor socket | BGA 1296 |
| Quick installation guide | Yes |
| RAID levels | 0, 1, JBOD |
| RAID Support | Yes |
| RAID support | Yes |
| Reset button | Yes |
| Security algorithms | 256-bit AES,FIPS 140-2,HTTPS,SSH,SSL/TLS |
| Share folder | CIFS/SMB |
| Share folder access right management | Yes |
| Storage drive sizes supported | 2.5,3.5" |
| Storage drives installed | Yes |
| Supported file systems | FAT32,HFS+,NTFS,exFAT,ext3,ext4 |
| Supported storage drive interfaces | Serial ATA III |
| Supported storage drive types | HDD,SSD |
| System bus rate | 5 GT/s |
| System log | Yes |
| Thermal design power | 10 W |
| Thermal monitoring technologies | Yes |
| Tjunction | 105 °C |
| Type | NAS |
| UART | Yes |
| Universal Plug and Play UPnP | Yes |
| USB port | Yes |
| Wake-on-LAN ready | Yes |
| Wi-Fi | No |
| Windows operating systems supported | Windows 10,Windows 7,Windows 8 |
QNAP is a Taiwanese technology company that produces network-attached storage (NAS) devices. The company was founded in 2004 and is headquartered in Taipei. QNAP's products are used by consumers, small businesses, and enterprises, and include NAS devices, surveillance solutions, and cloud storage services.
