● Processor : Intel® Celeron® J4025/J4005 dual-core 2.0 GHz processor
● Memory : 2 x SO-DIMM DDR4 For dual-DIMM configuration, you must use a pair of identical DDR4 modules.
● Slot Bay : 2 x 3.5-inch SATA 6Gb/s, 3Gb/s
Powered by Intel® Celeron® J4025 dual-core 2.0 GHz processor (burst up to 2.9 GHz), DDR4 RAM (up to 8 GB), one Gigabit LAN port, and supports SATA 6Gb/s hard drives, the TS-251D combines network expansion cards to create dependable read/write performance. The TS-251D features Intel® AES-NI 256 hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while securing sensitive data stored in the TS-251D.
Tested in QNAP Labs. Figures may vary by environment.
OS: QTS 4.4.1, Windows upload/download, MTU-9000
Volume type: RAID 0; 2 x Samsung 850 Pro 512GB; QNAP QXG-10G1T
Client PC: Intel® Core TM i7-6700 3.40GHz CPU; 32GB RAM; Intel X550 NIC with MTU-9000; Windows® 10 Pro
QuMagie integrates QuMagie Core AI image recognition technology for facial recognition, subject identification, and geotagging photos. Similar photos are categorized into People, Places, and Things albums. Moreover, QuMagie features a built-in timeline scroll, customizable folder covers, iOS® Live Photo display and a powerful search tool, to provide you with the ultimate photo management and image sharing solution.
Featuring advanced Intel® UHD Graphics, the TS-251D supports dual-channel 4K hardware decoding and real-time transcoding, allowing you to convert videos to universal file formats that can be smoothly played across various devices*. You can also watch high-quality 4K media files on an HDTV using the HDMI output or with Plex® Media Server to stream media files to mobile devices and media streaming devices (including DLNA®, Roku®, Apple TV® (via Qmedia), Amazon Fire TV® and Chromecast™). The QNAP RM-IR004 remote control (sold separately) can be configured using QButton to customize individual button actions, providing a more user-friendly NAS experience.
*The TS-251D’s hardware provides hardware decoding, encoding, and transcoding capabilities. However, playback quality may vary due to playback software, file formats, system usage, and available bandwidth.
With a PCIe expansion Gen 2.0 x 4 slot, the TS-251D provides flexibility in extending NAS functionality and potential applications. To optimize system performance, install a QNAP QM2 card for M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance. You can also use the TS-251D as a wireless access point by installing a compatible QNAP QWA-AC2600 wireless network card to create a wireless media streaming environment. Moreover, by configuring the QXG-10GbE/5GbE network expansion cards, you can upgrade your network to high-speed connectivity with an existing CAT 5e cable. Alternatively, you can add an affordable QNAP QNA-UC5G1T USB 3.2 Gen 1 to 5GbE adapter to your TS-251D and laptop to enjoy higher network speeds, or boost the USB connectivity of the TS-251D by installing a USB 3.2 Gen 2 (10Gbps) card.
QNAP’s QVR Pro surveillance solution allows you to arrange dedicated, independent storage space for surveillance data on the TS-251D and leverages scalable storage advantages. With QVR Pro, camera management, storage space allocation, camera live view, and playback is greatly simplified. You can also use USB webcams as network cameras with the QUSBCam2 app, and remotely monitor surveillance feeds anytime with QVR Pro Client mobile app.
1. QVR Pro is available for the QNAP NAS models with a least 4GB RAM, QNAP NAS with 2GB RAM please use Surveillance Station.
2. The maximum number of channels supported varies by NAS model, network configuration, and camera settings. For more information, visit https://www.qnap.com/go/qvr-nas-selector.
The app-driven QTS operating system provides solutions for simplifying file backup, management, search, and more.
Centrally manage and switch between different email accounts, back up emails to the NAS, and safeguard email security and personal privacy.
Notes Station 3 can bring the advantages of collaborative note-taking with improved productivity to provide higher efficiency for your workgroup.
Qfiling automates file organization. Files are automatically archived into folders based on your settings.
Qsirch quickly finds images, music, videos, documents, emails, and other files.
QNAP provides an easy and flexible solution for increasing storage capacity before you run out of storage space. Here are the following ways you can expand NAS storage for accommodating data and business growth:
Hot-swap lower-capacity drives with larger-capacity drives for your QNAP NAS to grow with your business.
Use Virtual JBOD (VJBOD) to expand storage capacity by using unused storage in other QNAP NAS. Up to 8 QNAP NAS can be mounted as local disks on the TS-251D.
Easily expand NAS capacity by connecting two TR-002, TR-004 USB hardware RAID external enclosures with QNAP’s Storage & Snapshots Manager application.
|CPU||Intel® Celeron® J4025/J4005 dual-core 2.0 GHz processor|
|CPU Architecture||64-bit x86|
|Memory Slot||2 x SO-DIMM DDR4|
For dual-DIMM configuration, you must use a pair of identical DDR4 modules.
|Flash Memory||4GB (Dual boot OS protection)|
|Drive Bay||2 x 3.5-inch SATA 6Gb/s, 3Gb/s|
The system is shipped without HDD.
For the HDD compatibility list, please visit https://www.qnap.com/compatibility/
|Drive Compatibility||3.5-inch SATA hard disk drives|
2.5-inch SATA hard disk drives
2.5-inch SATA solid state drives
|M.2 SSD Slot||Optional via a QM2 PCIe adapter|
|SSD Cache Acceleration Support|
|Gigabit Ethernet Port (RJ45)||1|
Expandable with an optional PCIe adapter
|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|
|Wake on LAN (WOL)|
|Graphic Processors||Intel® HD Graphics 600|
|Floating Point Unit|
|System Memory||4 GB SO-DIMM DDR4 (1 x 4 GB)|
|Maximum Memory||8 GB (2 x 4GB)|
Slot 1: PCIe Gen 2 x4
PCIe bandwidth limitations will restrict the NAS 10GbE performance.
|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||(Optional QNAP RM-IR004 remote control)|
|HDMI Output||1, HDMI 2.0|
|LED Indicators||Power/Status, LAN, USB, HDD1-2|
|Buttons||Power, USB copy, Reset|
|Dimensions (HxWxD)||168 × 105 × 226 mm|
|Weight (Net)||1.48 kg|
|Weight (Gross)||2.58 kg|
|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|
Tested with drives fully populated.
|Fan||1 x 70mm|
|Sound Level||16.7 db(A)|
|Kensington Security Slot|