QNAP TS-251A 2-Bay NAS Enclosure

QNAP TS-251A 2-Bay NAS Enclosure

QNAP TS-251A 2-Bay NAS Enclosure

B&H # QNTS251A4GUS MFR # TS-251A-4G-US
No Longer Available

Product Highlights

  • 2 x 2.5"/3.5" SATA III Drive Bays
  • 1.6 GHz Intel Celeron N3060 Dual-Core
  • 2 x Gigabit Ethernet Ports
  • 1 x USB 3.0 Micro-B, 3 x USB 3.0 Ports
  • HDMI and Audio Ports
  • RAID 0, 1, JBOD, Single
  • Up to 211.88 MB/s Throughput
  • AES 256-Bit Volume Encryption
  • QTS 4.2 Operating System
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QNAP TS-251A-4G-US overview

  • 1Description

The QNAP TS-251A 2-Bay NAS Enclosure sports two drive bays so you can create the right amount of shared storage capacity for your network-connected devices. In addition to offering a NAS solution, the QNAP TS-251A can also function as a PC-like system with the preinstalled Linux-based QTS operating system. You may download useful apps to turn this NAS into a karaoke machine, a surveillance system, and more. To help everything run smoothly, it is powered by a 1.6 GHz dual-core Intel Celeron N3060 processor along with 4 GB of DDR3 memory. Moreover, a micro-USB 3.0 port is on board for setting up the QNAP TS-251A without needing a router or switch, using a computer and an optional USB 3.0 or USB 2.0 Type-A to Micro-B cable.

The two SATA-based drive bays support 2.5" and 3.5" hard drives and SSDs, providing you with the option to build a low-cost storage unit with spinning drives or a high-performance delivery system utilizing solid-state technology. The NAS enclosure lets you configure your drives in a RAID 0 or 1 array, which enhances the drive's read and write performance or ability to preserve data in the event a drive fails. You can expand the TS-251A's storage capacity by attaching optional QNAP expansion units to its USB 3.0 ports, which can also be used for printers, keyboards, and mice. Other notable connectivity features include an SD card slot along with two Gigabit Ethernet ports that offer failover and teaming support.

The QNAP TS-251A enclosure can be configure as a Plex server that streams multimedia content across mobile devices as well as to your TV. It comes outfitted with an HDMI port and a real-time hardware transcoding engine to produce detailed visuals at resolutions of up to 3840 x 2160. For singing along with your favorite artist, you can connect speakers and microphones to its two 3.5mm audio jacks. Aside from connections, a remote control is included, letting you play, rewind, and fast-forward videos from the comfort of your couch.

The TS-251A is powered by a 14nm Intel Celeron dual-core 1.6 GHz processor that features low TDP (only 6 watts) and can automatically burst up to 2.48 GHz. Coupled with dual-channel 4 GB DDR3L-1600 dual-channel RAM (upgradable to 8GB), dual Gigabit LAN ports, and SATA 6 Gb/s, the TS-251A can deliver up to 211.88 MB/s throughputs for optimizing mission-critical tasks while still being energy efficient. The TS-251A also features Intel AES-NI hardware-accelerated encryption for both full NAS volume and shared folders, boosting system security of sensitive business data stored in the NAS. It runs at 209.13 MB/s under AES-NI encryption.
Hybrid NAS Featuring Direct Access via USB
The TS-251A features an innovative USB QuickAccess port that allows you to complete the first-time installation and setup of your TS-251A without requiring network connectivity. The files and data stored on the TS-251A can also be directly accessed by using Qfinder Pro and a user supplied USB 3.0 or 2.0 Type-A male to Micro-B male cable. Furthermore, you can assign access rights to users for different folders to prevent unauthorized access to important files. The TS-251A provides a USB QuickAccess port for direct access, along with its native NAS transmission mode over the network allowing users to multi-task with maximized productivity.
4K Video Transcoding
Featuring 8th-generation Intel HD Graphics, the TS-251A supports 4K H.264 hardware decoding and delivers real-time 4K and 1080p video transcoding to convert videos to universal formats, which can be smoothly played on PCs, mobile devices, and Smart TVs. With offline transcoding, you can still enjoy smooth video playback via File Station, Video Station, and the Qfile mobile app by selecting a pre-rendered lower resolution video. The TS-251A also allows you to set a dedicated folder for automatic video transcoding.
Multi-Zone Multimedia Controls
Use a TS-251A as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage and stream photos, music, and videos stored on the TS-251A to HDMI, USB, and Bluetooth devices. The TS-251A is compatible with Plex Media Server.
QTS Operating System
With an intuitive user interface, the QTS operating system is smart and smooth. Its modern flat design streamlines loading times, and the intelligent desktop allows you to find desired functions quickly, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, and open multiple application windows to run multiple tasks concurrently, bringing working efficiency. QTS provides optimized cloud experiences and incorporates advanced features including volume/LUN snapshots, remote connections to public cloud services in File Station, multi-zone multimedia system, and more.
File Synchronization Across Devices and Clouds
Qsync turns your TS-251A into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251A will be made available for all linked devices, such as computers, laptops, and mobile devices. Qsync is useful for frequent travelers to manage files and have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization and group file sharing, enhancing the flexibility of team projects and collaboration. It also supports centralized configuration and allows you to remotely erase the Qsync folder on a lost device to avoid data breaches, and even restore it after you have retrieved the device.
Cross-Platform File Sharing, Centralized Data Storage
The TS-251A supports SMB/CIFS, NFS, and AFP protocols for file sharing across Windows, Mac, and Linux/UNIX networks. Data, logs, and ISO images of CDs and DVDs can be centrally stored on the TS-251A and protected by an integrated antivirus solution. Windows AD and LDAP services enable system administrators to configure user permissions by using an existing Windows AD server, LDAP server, or integrated LDAP service.
Centralize Backups, Restoration, and Synchronization
Hybrid Backup Sync consolidates backup, restoration, and synchronization functions into a single QTS application for you to easily transfer your data to a local or remote QNAP NAS. It can also send data to remote servers and cloud storage spaces for a comprehensive data storage and disaster recovery plan. You can synchronize files between the TS-251A and cloud storage in real time. Hybrid Backup Sync can detect sparse files to avoid backing up unnecessary data, and supports file compression to save storage space. There are flexible settings for concurrent file processing and multi-threaded data transfer by splitting large files into smaller parts, increasing the file transfer rate for improved work efficiency.
Snapshot for Volume & LUN
QTS Storage Manager features an easy-to-use web-based snapshot tool to easily backup and restore data on the TS-251A back to any point of time in the event of data loss. You can take snapshots for volumes and LUN (up to 64 snapshots per volume/LUN and maximum 256 snapshots per NAS), efficiently replicate volume/LUN snapshots via Snapshot Replica to remote servers by copying only the changes made, and quickly clone a volume /LUN snapshot as a local volume without interrupting current system operations. You can even set up the system to automatically take a snapshot of the volume before backing up via RTRR/rsync, even if files are opened.
Qsirch Search
The TS-251A supports Qsirch, which is a proprietary search engine for quick file searching. In addition to previewing thumbnails, content abstract, and keyword hints, Qsirch allows you to search through all of the .eml files stored on the TS-251A and use customized search criteria, such as date, size, sender, and recipient. Qsirch even remembers your search history allowing you to quickly navigate to files you've previously searched for. You can also use Google Chrome extension to search for files on your NAS when using Google Search.
QmailAgent is an online email client that helps you manage multiple email accounts, allowing you to access all of your emails and easily switch between different accounts. It provides complete functionality for composing, reading, and organizing emails. You can even attach files, photos, and documents from the TS-251A when composing emails. QmailAgent also allows iOS and Android users to check multiple email accounts with mobile devices and browse & send emails using the QmailAgent on their TS-251A. You can also use QmailAgent with Qsirch.
QTS-Linux Dual Systems for IoT Applications
The TS-251A's QTS-Linux dual systems are based on QNAP's virtualization technologies. The architecture of the TS-251A enables users to develop or utilize IoT packages for Linux. The TS-251A supports Ubuntu that allows users to develop and install various IoT packages on demand and centrally store the data on the TS-251A, providing a secure private storage and IoT development solution. Simply plug in a keyboard, mouse, and HDMI monitor to the TS-251A, so you can use the Linux Station as if you were using a PC. You can also operate Ubuntu in Linux Station as a remote desktop via web browser for instant management.
Storage for Hosting Virtual Machines and Containerized Applications
Virtualization Station allows you to host virtual machines (VM) on the TS-251A and access them via a web browser or VNC. It supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, and Device Management for centrally managing VMs. It allows the TS-251A and VMs to share the same LAN port. No longer constrained by physical network performance, Virtual Switches increase data transfers between VMs as well as between VMs and NAS through an internal interface. You can also download VMs on demand from online VM markets and import them to the TS-251A without complex procedures.

The TS-251A also supports container technology for server virtualization with Container Station. It integrates LXC and Docker lightweight virtualization technologies, allowing you to operate multiple isolated Linux systems on the TS-251A as well as download apps from the built-in Docker Hub Registry. Container Station now also provides a QIoT Containers platform to help you quickly structure your IoT environment and deployment for your private cloud.
Comprehensive Surveillance Solution
Surveillance Station is a network surveillance Video Management System (VMS) that offers a user-friendly management interface, over 3,000 compatible IP camera models, and expandable IP camera channel licenses. It supports real-time monitoring as well as video & audio recording and playback with a wide range of customizable settings. You can also install the Vmobile app on your iOS or Android devices to manage monitored channels anytime and anywhere to safeguard your office environment. Moreover, Vcam mobile is an app that turns your device into a network camera to instantly record your surrounds to your TS-251A. QNAP includes 2 free IP camera channels and you can expand up to 32 channels by purchasing additional licenses.
Virtual JBOD
Besides using physical storage expansion enclosures, there is an additional option to expand NAS storage capacity. QNAP VJBOD (Virtual JBOD) is network-based JBOD that allows you to expand the storage of a QNAP NAS by using unused storage from other QNAP NAS units. You can mount this storage space to the TS-251A as virtual disks and create virtual storage pools and volumes for NAS functions such as creating and reverting snapshots, indexing multimedia files into the media library, and even creating iSCSI LUNs. VJBOD supports 10GbE/40GbE connections and port trunking (link aggregation with multiple LAN ports) to increase the performance and reliability of your VJBOD storage.
Expand Storage Capacity Easily
The TS-251A supports online capacity expansion for archiving rapidly-growing data by connecting an optional QNAP expansion enclosure. With QNAP scale-up solution, the raw storage capacity can be expanded on demand, making the TS-251A a suitable file center with large storage capacity, useful for data-intensive applications.

With QJBOD Express (JBOD enclosures roaming) support, you can just connect a large capacity QNAP expansion enclosure to the TS-251A, and migrate data to another NAS through the JBOD enclosure without needing a network connection.
If you encounter technical problems or have suggestions for improving our products, you can directly contact our support staff using the Helpdesk app. This app allows you to directly send feedback, questions, and technical support requests to QNAP's support team. Helpdesk features remote support, allowing QNAP's team to help you quickly resolve issues by remotely connecting to your NAS over a secure 256-bit SSL encrypted connection. Helpdesk also provides a range of online resources including online tutorials, frequently-asked questions, compatibility lists, and QNAP Helpdesk Knowledgebase. Whether you are a new or experienced NAS user, you can quickly find answers to your questions by browsing through these resources.
OceanKTV is the first NAS-based karaoke application that allows you to create a quality karaoke experience at home or in the office. The TS-251A offers high-capacity storage for accommodating up to thousands of 1080p karaoke songs. The TS-251A comes with a 3.5mm microphone jack and can transmit audio to your amplifier using an HDMI or 3.5mm Line-out port. Simply attach an HDMI display to the TS-251A and start singing with OceanKTV. The experience can be managed using the OceanKTV app in QTS or by using the OceanKTV mobile app on your phone or tablet.
Additional Features
The TS-251A supports various applications for home offices such as FTP Server, Web Server, RADIUS Server, VPN Client, Printer Server, and Surveillance Station.
In the Box
QNAP TS-251A 2-Bay NAS Enclosure
  • 2 x Ethernet Cable
  • 65W AC Adapter
  • Power Cord
  • Package of Flat Head Screws
  • IR Remote Control
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    QNAP TS-251A-4G-US specs

    Processor 14 nm 1.6 GHz Intel Celeron N3060 dual-core (up to 2.48 GHz)
    Security AES-NI hardware encryption acceleration
    1 x Kensington security slot
    System Memory 4 GB DDR3L (2 x 2 GB)
    Max Memory: 8 GB
    Memory Slots: 2 x SODIMM DDR3L (identical DDR3L modules for dual-DIMM configurations)
    Flash Memory 4 GB pre-loaded with QTS system
    Drives Supported 2 x 3.5"/2.5" SATA 6 Gb/s HDDs or SSDs
    LAN 2 x Gigabit Ethernet ports
    Ports 3 x USB 3.0 Type-A ports (Front: 1, Rear: 2)
    1 x USB 3.0 micro-B port (QuickAccess)
    1 x HDMI
    1 x 3.5 mm microphone jack
    1 x 3.5 mm line-out jack
    1 x system maintenance port
    Card Reader SD
    Supported Resolution Up to 3840 x 2160 @ 30 Hz
    LED Indicators Status/Power, USB, HDD 1, HDD 2
    Controls Power/Status, USB one-touch backup, and reset buttons
    IR Receiver Yes, supports QNAP RM-IR002 and MCE-compliant remote controls
    Noise Level 18.3 dBA
    Power Consumption System sleep: 0.72 W
    HDD standby: 7.9 W
    In operation: 16.2 W (with 2 x 2 TB HDDs)
    Power 100 to 240 VAC, 65 W AC power adapter
    Cooling 1 x 70 mm fan (12 VDC)
    Operating Temperature 32 to 104°F / 0 to 40°C
    Humidity 5 to 95% RH (non-condensing)
    Operating System QTS 4.2 (embedded Linux)
    Client OS Support Windows 7, Windows 8, Windows 10
    Windows Server 2003, 2008 R2, 2012, 2012 R2
    Mac OS X
    Linux and UNIX
    Supported Browsers Microsoft Internet Explorer 10+, Google Chrome, Apple Safari 7+, Mozilla Firefox
    Multilingual Support Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
    File System Support Internal Hard Drive: EXT4
    External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
    Networking TCP/IP (IPv4 & IPv6: Dual Stack)1
    Dual Gigabit NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming)
    Service binding based on network interfaces
    Squid Proxy server & Proxy client
    Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
    UPnP & Bonjour Discovery
    Security Support 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 2
    Importable SSL certificates
    Instant alerts via email, SMS, beep, and push service
    2-step verification
    Storage Management QNAP flexible Volume/LUN with thin provisioning and space reclaim
    Disk volume types: RAID 0, 1, JBOD, single
    Supports volume/LUN snapshots, up to 256 per system (4 GB System RAM required)
    SSD read-only/read-write cache
    Power Management Wake on LAN
    Scheduled power on/off
    Automatic power on after power recovery
    USB and network UPS support with SNMP management
    System sleep mode (S3)
    iSCSI (IP SAN) iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined)
    Supports LUN mapping & masking
    Online LUN capacity expansion
    Support for SPC-3 persistent reservation
    Supports MPIO & MC/S
    iSCSI LUN backup, one-time snapshot, and restoration
    iSCSI connection and management by QNAP Windows Qfinder
    Virtual disk drive (via iSCSI initiator)
    Stack chaining master
    Max No. of virtual disk drives: 8
    Dimensions (H x W x D) 6.7 x 4 x 8.6" / 16.9 x 10.2 x 21.9 cm
    Weight 2.9 lb / 1.3 kg
    Packaging Info
    Package Weight 5.95 lb
    Box Dimensions (LxWxH) 12.6 x 10.0 x 4.5"

    QNAP TS-251A-4G-US reviews

    TS-251A 2-Bay NAS Enclosure is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Super fast and it does the job For the price paid, it's the best performance what you can get on the market. I love the app store and the simplicity
    Date published: 2018-02-07
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