QNAP TS-251B SAN/NAS Storage System
TS-251B-4G-US
QNAP Systems
Product Overview
  • Intel Celeron J3355 Dual-core (2 Core) 2 GHz
  • 2 x HDD Supported
  • 2 x SSD Supported
  • 4 GB RAM DDR3L SDRAM
  • Serial ATA/600 Controller
  • RAID Supported 0, 1, Hot Spare, JBOD
  • 2 x Total Bays
  • 2 x 2.5"/3.5" Bay
  • 1 x Total Slot(s)
  • Gigabit Ethernet
  • HDMI
  • 5 USB Port(s)
  • 3 USB 2.0 Port(s)
  • 2 USB 3.0 Port(s)
  • Network (RJ-45)
  • QTS 4.3.4
  • DNS, Telnet, DLNA, IPv6, FTPS, WEBDAV, SSL/TLS, AFP, CIFS, HTTPS, FTP, ...
  • 4 GB Flash Memory Capacity
  • Tower

First home/SOHO Intel dual-core NAS with a PCIe slot for extending NAS functionality

The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP's first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications. You can install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the QNAP QWA-AC2600) to turn the TS-251B into a wireless access point and to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding and transcoding, allowing you to enjoy watching NAS media files smoothly across various devices.

The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.

4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications.

Snapshots fully record the system status and data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data.

Hybrid Backup Sync consolidates backup and sync tasks into a single app, providing multiple layers of data protection.

Remotely access the apps and files on your TS-251B via myQNAPcloud and easily manage and share files.

Supports containerized applications and hosting virtual machines with various operating systems.

Intel® Celeron® J3355 dual-core processor and AES-NI hardware encryption

Powered by a 14nm Intel® Celeron® J3355 dual-core 2.0GHz processor (burst up to 2.5 GHz), 2GB/4GB DDR3L RAM (up to 8GB), a single Gigabit LAN port, and supporting SATA 6Gb/s hard drives, the TS-251B provides dependable performance of up to 672 MB/s read/write speeds. The TS-251B features Intel® AES-NI hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while ensuring the security of sensitive data stored in the TS-251B.

Extend NAS functionality with the PCIe slot

With a PCIe expansion slot, the TS-251B provides flexibility in extending NAS functionality and potential applications. Install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance; use the TS-251B as a wireless access point by installing a compatible wireless network card (such as the QNAP QWA-AC2600) to create a wireless media streaming environment; or boost the USB connectivity of the TS-251B by installing a USB 3.1 Gen 2 (10Gbps) card.

A tailor-made private wireless network that meets your needs

By installing the QWA-AC2600 and WirelessAP Station app, your NAS will evolve into a high-performance wireless access point that can be connected to from multiple devices. The QWA-AC2600 can also be used to extend your wireless network coverage. Combined with useful features (including DHCP and NAT) provided by the Network and Virtual Switch app, the QWA-AC2600 can be used for a variety of applications, delivering private, fast, low-latency and secure connectivity across your home and/or workplace. (WirelessAP Station requires Container Station to be installed on your QNAP NAS.)

ManufacturerQNAP Systems
Manufacturer Part NumberTS-251B-4G-US
Manufacturer Website Addresshttp://www.qnap.com
Brand NameQNAP
Product ModelTS-251B
Product NameTS-251B SAN/NAS Storage System
Marketing Information

First home/SOHO Intel dual-core NAS with a PCIe slot for extending NAS functionality

The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP's first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications. You can install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the QNAP QWA-AC2600) to turn the TS-251B into a wireless access point and to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding and transcoding, allowing you to enjoy watching NAS media files smoothly across various devices.

The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.

4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications.

Snapshots fully record the system status and data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data.

Hybrid Backup Sync consolidates backup and sync tasks into a single app, providing multiple layers of data protection.

Remotely access the apps and files on your TS-251B via myQNAPcloud and easily manage and share files.

Supports containerized applications and hosting virtual machines with various operating systems.

Intel® Celeron® J3355 dual-core processor and AES-NI hardware encryption

Powered by a 14nm Intel® Celeron® J3355 dual-core 2.0GHz processor (burst up to 2.5 GHz), 2GB/4GB DDR3L RAM (up to 8GB), a single Gigabit LAN port, and supporting SATA 6Gb/s hard drives, the TS-251B provides dependable performance of up to 672 MB/s read/write speeds. The TS-251B features Intel® AES-NI hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while ensuring the security of sensitive data stored in the TS-251B.

Extend NAS functionality with the PCIe slot

With a PCIe expansion slot, the TS-251B provides flexibility in extending NAS functionality and potential applications. Install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance; use the TS-251B as a wireless access point by installing a compatible wireless network card (such as the QNAP QWA-AC2600) to create a wireless media streaming environment; or boost the USB connectivity of the TS-251B by installing a USB 3.1 Gen 2 (10Gbps) card.

A tailor-made private wireless network that meets your needs

By installing the QWA-AC2600 and WirelessAP Station app, your NAS will evolve into a high-performance wireless access point that can be connected to from multiple devices. The QWA-AC2600 can also be used to extend your wireless network coverage. Combined with useful features (including DHCP and NAT) provided by the Network and Virtual Switch app, the QWA-AC2600 can be used for a variety of applications, delivering private, fast, low-latency and secure connectivity across your home and/or workplace. (WirelessAP Station requires Container Station to be installed on your QNAP NAS.)

Product TypeSAN/NAS Storage System
Number of Hard Drives Supported2
Number of Hard Drives InstalledNo
Number of Solid State Drive Supported2
Number of Solid State Drive InstalledNo
Flash Memory Capacity4 GB
Processor ManufacturerIntel
Processor TypeCeleron
Processor ModelJ3355
Processor CoreDual-core (2 Core)
Processor Speed2 GHz
Standard Memory4 GB
Memory TechnologyDDR3L SDRAM
Ethernet TechnologyGigabit Ethernet
Number of Total Expansion Bays2
Number of 2.5"/3.5" Bays2
Number of Total Expansion Slots1
Expansion Slot TypePCI Express 2.0 x2
Controller TypeSerial ATA/600
RAID SupportedYes
RAID Levels0, 1, Hot Spare, JBOD
HDMIYes
Total Number of USB Ports5
Number of USB 2.0 Ports3
Number of USB 3.0 Ports2
Network (RJ-45)Yes
Operating SystemQTS 4.3.4
ProtocolsSSH
ProtocolsTelnet
ProtocolsDDNS
ProtocolsAFP
ProtocolsDNS
ProtocolsDHCP
ProtocolsSSL/TLS
ProtocolsSMTP
ProtocolsTCP/IP
ProtocolsiSCSI
ProtocolsWEBDAV
ProtocolsPPTP
ProtocolsHTTPS
ProtocolsFTPS
ProtocolsCIFS
ProtocolsFTP
ProtocolsLDAP
ProtocolsRSync
ProtocolsDLNA
ProtocolsHTTP
ProtocolsSNMP
ProtocolsUPnP
ProtocolsIPv6
ProtocolsCIFS/SMB
ProtocolsFXP
ProtocolsSMB
ProtocolsIPv4
Height6.6"
Width4.1"
Depth8.9"
Form FactorTower
Weight (Approximate)3.37 lb
Package Contents
  • TS-251B SAN/NAS Storage System
  • 1 x Ethernet Cable
  • AC Adapter
  • Power Cord
  • 8 x Flat Head Screws (for 3.5" HDD)
  • 6 x Flat head Screw (for 2.5" HDD)
  • Quick Installation Guide (QIG)
Limited Warranty2 Year
General Information
ManufacturerQNAP Systems
Manufacturer Part NumberTS-251B-4G-US
Manufacturer Website Addresshttp://www.qnap.com
Brand NameQNAP
Product ModelTS-251B
Product NameTS-251B SAN/NAS Storage System
Marketing Information

First home/SOHO Intel dual-core NAS with a PCIe slot for extending NAS functionality

The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP's first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications. You can install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the QNAP QWA-AC2600) to turn the TS-251B into a wireless access point and to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding and transcoding, allowing you to enjoy watching NAS media files smoothly across various devices.

The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.

4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications.

Snapshots fully record the system status and data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data.

Hybrid Backup Sync consolidates backup and sync tasks into a single app, providing multiple layers of data protection.

Remotely access the apps and files on your TS-251B via myQNAPcloud and easily manage and share files.

Supports containerized applications and hosting virtual machines with various operating systems.

Intel® Celeron® J3355 dual-core processor and AES-NI hardware encryption

Powered by a 14nm Intel® Celeron® J3355 dual-core 2.0GHz processor (burst up to 2.5 GHz), 2GB/4GB DDR3L RAM (up to 8GB), a single Gigabit LAN port, and supporting SATA 6Gb/s hard drives, the TS-251B provides dependable performance of up to 672 MB/s read/write speeds. The TS-251B features Intel® AES-NI hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while ensuring the security of sensitive data stored in the TS-251B.

Extend NAS functionality with the PCIe slot

With a PCIe expansion slot, the TS-251B provides flexibility in extending NAS functionality and potential applications. Install a QNAP QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance; use the TS-251B as a wireless access point by installing a compatible wireless network card (such as the QNAP QWA-AC2600) to create a wireless media streaming environment; or boost the USB connectivity of the TS-251B by installing a USB 3.1 Gen 2 (10Gbps) card.

A tailor-made private wireless network that meets your needs

By installing the QWA-AC2600 and WirelessAP Station app, your NAS will evolve into a high-performance wireless access point that can be connected to from multiple devices. The QWA-AC2600 can also be used to extend your wireless network coverage. Combined with useful features (including DHCP and NAT) provided by the Network and Virtual Switch app, the QWA-AC2600 can be used for a variety of applications, delivering private, fast, low-latency and secure connectivity across your home and/or workplace. (WirelessAP Station requires Container Station to be installed on your QNAP NAS.)

Product TypeSAN/NAS Storage System
Storage
Number of Hard Drives Supported2
Number of Hard Drives InstalledNo
Number of Solid State Drive Supported2
Number of Solid State Drive InstalledNo
Flash Memory Capacity4 GB
Processor & Chipset
Processor ManufacturerIntel
Processor TypeCeleron
Processor ModelJ3355
Processor CoreDual-core (2 Core)
Processor Speed2 GHz
Memory
Standard Memory4 GB
Memory TechnologyDDR3L SDRAM
Network & Communication
Ethernet TechnologyGigabit Ethernet
I/O Expansions
Number of Total Expansion Bays2
Number of 2.5"/3.5" Bays2
Number of Total Expansion Slots1
Expansion Slot TypePCI Express 2.0 x2
Controllers
Controller TypeSerial ATA/600
RAID SupportedYes
RAID Levels0, 1, Hot Spare, JBOD
Interfaces/Ports
HDMIYes
Total Number of USB Ports5
Number of USB 2.0 Ports3
Number of USB 3.0 Ports2
Network (RJ-45)Yes
Software
Operating SystemQTS 4.3.4
Management & Protocols
ProtocolsiSCSI
ProtocolsFXP
ProtocolsHTTPS
ProtocolsIPv4
ProtocolsFTP
ProtocolsLDAP
ProtocolsSMB
ProtocolsSMTP
ProtocolsHTTP
ProtocolsDLNA
ProtocolsCIFS
ProtocolsSSL/TLS
ProtocolsUPnP
ProtocolsDNS
ProtocolsTCP/IP
ProtocolsFTPS
ProtocolsCIFS/SMB
ProtocolsSSH
ProtocolsSNMP
ProtocolsPPTP
ProtocolsRSync
ProtocolsWEBDAV
ProtocolsAFP
ProtocolsDHCP
ProtocolsTelnet
ProtocolsDDNS
ProtocolsIPv6
Physical Characteristics
Height6.6"
Width4.1"
Depth8.9"
Form FactorTower
Weight (Approximate)3.37 lb
Miscellaneous
Package Contents
  • TS-251B SAN/NAS Storage System
  • 1 x Ethernet Cable
  • AC Adapter
  • Power Cord
  • 8 x Flat Head Screws (for 3.5" HDD)
  • 6 x Flat head Screw (for 2.5" HDD)
  • Quick Installation Guide (QIG)
Warranty
Limited Warranty2 Year
$ 475.00
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