QNAP TS-451U 4-bay Rackmount Customizable NAS
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The TS-451U, featuring the easy-to-use QTS operating system, is an affordable, reliable and scalable 4-bay rackmount NAS designed for small offices and home offices, assisting in daily operations including file storage, backup, sharing, synchronization, and more. The TS-451U supports SATA 6Gb/s drives and delivers high performance with persistent throughput, providing a comprehensive storage solution for users to build a private cloud to access their data easily.
- Manage, share, and back up business data with Real-time Remote Replication (RTRR)
- Enhanced data security with high-performance AES 256-bit encryption and anti-virus
- Expand the total raw storage capacity up to 128TB with the economical UX-1200U-RP QNAP expansion enclosure
- Use the TS-451U with exclusive QvPC Technology
- Run multiple Windows/Linux/UNIX/Android-based virtual machines with the Virtualization Station
- Transcode Full HD videos on-the-fly or offline with QNAP’s unique transcoding technology
- Creatively present your animated content and advertisements with the Signage Station
Dual-core 2.41GHz processor for higher performance
Powered by a 22nm 64-bit dual-core Intel Celeron 2.41GHz processor with 1GB energy-efficient DDR3L RAM (upgradable to 8GB), coupled with the support of SATA 6Gb/s, 2 Gigabit LAN ports and HDMI output, the TS-451U is a powerful NAS that delivers up to 224 MB/s read & write speeds with dual LAN ports. The TS-451U can also automatically increase the processor's clock rate from 2.41GHz to 2.58GHz when needed for CPU-intensive tasks. The TS-451U's fast encryption and decryption performance provides transfer speeds of up to 128 MB/s with AES-256 bit volume encryption, boosting system performance & security while ensuring the safety of sensitive data stored in the TS-451U.
Tested in QNAP Labs. Figures may vary by environment.
- OS： QTS 4.1.2
- Volume type： RAID 5; 4 x Seagate ST1000NM0033
- Network environment： direct connection between NAS and PC, 1GbE LAN (MTU 1500);
- Intel(R) Core(TM) i7-4770 3.40GHz CPU; DDR3 1600Hz 16GB; Seagate ST500DM002; Intel Gigabit CT (MTU 1500); Windows 7 Professional 64bit SP1
- IOMeter configuration：Transferring 8GB file continuously to/from 2 PCs for 3 minutes. Block size： 64KB for SMB2.0 (Throughput)
QTS - Simple and efficient
Thanks to the intuitive user interface of QTS, system operations of the TS-451U are smooth and handy. Its 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 greater operating efficiency.
SSD cache acceleration
The TS-451U supports SSD caching which can greatly boost IOPS performance of storage volumes. It is perfect for improving overall workflow of IOPS-demanding applications such as virtualization.
Economical storage expansion with scale-up solution
The TS-451U offers a high performance yet affordable storage solution to fulfill the needs of business in archiving rapidly growing data & large files. The TS-451U supports capacity expansion by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on demand, making the TS-451U an ideal file center with a large storage capacity for business data.
The maximum raw storage capacity available by connecting a QNAP expansion enclosure:
* The maximum capacity is calculated by using 8TB HDDs.
Monitor and manage multiple NAS with Q'center
Q'center turns your TS-451U into a central management system to manage multiple Turbo NAS units. After installing Q'center in QTS App Center, you can use the TS-451U to centrally manage multi-site Turbo NAS for monitoring system logs and managing firmware update and maintenance, and enjoy major benefits including ease-of-use, cost-efficiency, convenience and flexibility. Managing multiple Turbo NAS becomes so easy and efficiently.
Cross-platform file sharing, centralized data storage
The TS-451U supports SMB/CIFS, NFS, and AFP protocols for file sharing across Windows, Mac, Linux/UNIX networks. Data, logs and ISO images of CDs and DVDs can be centrally stored on the TS-451U and protected by an integrated antivirus solution. The Windows AD and LDAP services enable system administrators to configure user permissions by using an existing Windows AD server, LDAP server or built-in LDAP service. The TS-451U supports SAMBA v4 and can act as a Windows domain controller to manage privilege settings.
Well-rounded backup solutions to secure data
QNAP NetBak Replicator supports real-time and scheduled data backup on Windows including Outlook email archiving. Apple Time Machine is also supported to provide Mac OS X users with a solution to effortlessly back up data to the TS-451U. The USB 2.0 port on the front panel of the TS-451U features a one-touch-copy function for you to instantly back up data from external drives to the TS-451U with just one click, or alternatively to back up data from the TS-451U to external drives. A wide range of third-party backup software such as Acronis True Image and Symantec Backup Exec are also supported.
Disaster recovery solutions brings peace of mind
The TS-451U offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time or scheduled data backup to a remote Turbo NAS or FTP server and synchronizes files to a remote folder from a local folder with better backup efficiency and reduced backup time. The TS-451U also supports rsync protocol to back up data to another remote server on scheduled basis. Data can also be backed up to and restored from a range of cloud storage services, including Amazon S3, Amazon Glacier, Microsoft Azure, ElephantDrive, Dropbox and Google Drive.
File synchronization across multiple devices
The Qsync utility turns your TS-451U into a safe data center for file synchronization with a large storage capacity. Any file uploaded to the TS-451U will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files and always have the most updated files on different devices. Qsync provides multiple ways of file synchronization and group file sharing, greatly enhancing the flexibility of collaboration.
Comprehensive security options
In open network environments, business data may be exposed in a potential hack. The TS-451U provides numerous security options, such as encrypted access, IP blocking, and more. IT administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-451U is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive business data from unauthorized access and breach even if the hard drives or the entire system were stolen.
Use your TS-451U with the exclusive QvPC Technology
QNAP’s exclusive QvPC Technology consolidates a number of high-end technologies including VM integration, multimedia transcoding, HDMI output, cloud integration and NAS connection technologies, allowing users to operate the TS-451U when they plug in a keyboard, mouse and HDMI monitor. With QvPC Technology, the TS-451U is transformed into a cost-effective device with PC functionalities for users to directly access stored data, run multiple applications using Windows/Linux/UNIX/Android-based VMs, surf the web on Google Chrome or Mozilla Firefox, enjoy Full HD videos with up to 7.1 channel audio with XBMC, monitor Surveillance Station in real time with local display, and much more.
Run additional operating systems on the TS-451U
With the support for Intel® Virtualization Technology (VT-x), the TS-451U can operate the Virtualization Station, transforming the TS-451U into a 2-in-a-box NAS that can function as an all-in-one NAS and a virtualization platform that supports multiple operating systems, fast virtual machine (VM) creation, VM import/export, snapshot, and enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-451U with minimal effort. You can also download VMs on demand from online VM markets and import them to the TS-451U without any complex procedures.
Real-time & offline HD video transcoding
The TS-451U delivers superior real-time Full HD video transcoding to convert videos to formats that can be smoothly played on PCs, mobile devices and Smart TVs. It allows multiple devices to simultaneously view different videos stored on the TS-451U with on-the-fly hardware accelerated transcoding. The TS-451U allows you to enjoy instant videos on multiple devices - even those that lack computing power or have limited file format support - without the need for complicated and time-consuming file conversion.
With the benefit of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos by selecting a pre-rendered lower resolution to play the videos via File Station, Video Station, or the Qfile mobile app without affecting the TS-451U’s system performance running other applications. This also allows more people to play videos via streaming. The TS-451U also allows you to set a dedicated folder for automatic video transcoding.
1080p local display with HD Station via HDMI
QNAP’s HD Station integrates the powerful XBMC media player and web browser. With HDMI connectivity, you can connect the TS-451U to a HDTV to enjoy your rich multimedia content on the big screen. The splendid user interface and support for 7.1 channel surround sound audio passthrough* brings smooth playback of Full HD videos providing a quality home theater experience**. You can even watch YouTube videos, surf the web and manage the Turbo NAS using Google Chrome or Mozilla Firefox with multilingual keyboard input. The HD Station supports multi-tasking and user authentication so only authorized users can access data stored on the TS-451U via HDMI monitors.
It is convenient & easy to control the HD Station. Turn your mobile devices into remote controls by installing the Qremote app. Moreover, the HD Station supports YouTube Pairing, allowing you to select a YouTube video on your smartphone, tablet or computer and play it on HDTV via the TS-451U.
*A receiver with HDMI support is required for decoding multi-channel surround sound.
**Video files up to 1080p resolution are supported. Some high-bitrate files or codecs are not supported due to the hardware limitations.
Comprehensive surveillance solution providing 24/7 security
Surveillance Station is professional network surveillance Video Management System (VMS) that offers a user-friendly management interface, over 2,700 compatible IP camera models, and expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording and playback with a wide range of customizable settings. You can also install the Vmobile mobile app on your iOS® or Android™ devices to manage the monitored channels anytime and anywhere to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-451U. The TS-451U offers 2 free IP camera channels and you can expand up to 24 channels by purchasing additional licenses.
Signage Station - Creatively present your animated content and ads
With the Signage Station, it is easy to create content for a wide range of materials such as menu boards, advertisements, posters, and business profiles. The Signage Station is a great tool to invigorate your advertisements or animated materials for promoting your services, and to update contents in a timely manner. The iArtist Lite application, with intuitive editing tools, helps you create these signs with simple drag & drop tools. Your creativity can now travel around the world with a few simple steps to instantly get published, revised, and shared.
Access, use, sync and enjoy with your tablets and smartphones
The TS-451U is your private cloud storage that virtually enlarges the capacity of your mobile devices. Qfile allows you to access, upload, download, manage, and share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an iOS device, users can also browse videos & photos stored on the TS-451U and play via Apple TV. Qmanager lets you monitor & manage the TS-451U remotely and efficiently without turning on a PC; Qmusic allows you to listen to your music collections on the TS-451U anytime and anywhere, and download to enjoy offline; Qphoto & Qvideo make it easy for you to browse and share the photos or videos on the go.
Install-on-demand apps to extend NAS functionality
The TS-451U has a built-in App Center that provides various install-on-demand apps developed by QNAP and third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, and much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP’s development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-451U.
The TS-451U utilizes a 22nm CPU and DDR3L RAM which feature low voltage requirements and low power consumption whilst maintaining high performance in system operations. Other eco-friendly designs include scheduled power on/off, hard disk standby mode, and Wake on LAN.
Easy-to-use NAS management tools
The TS-451U provides comprehensive system tools to increase management efficiency.
Instant Alert Notifications
With the SMTP and SMS settings on the Turbo NAS, system administrators will get notifications via SMS or email if an error occurs.
Easily monitor CPU, memory, disk & network bandwidth usage, as well as currently-running Turbo NAS apps and services.
Wake on LAN
Administrators can turn on the Turbo NAS via LAN to save energy and improve security.
Scheduled Power on/off
Administrators can flexibly set up the time of powering on/off the Turbo NAS, with a maximum of 15 schedules for setting powering on, off, or rebooting.
S.M.A.R.T. & Advanced Hard Drive Health Scan (HHS)
The Turbo NAS supports HDD S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) which monitors the hard drive status, and sends out email notifications for administrators to take action. The HHD Health Scanning technology can also examine hard drive status and prevent possible data loss.
Comprehensive Event Logs
The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet and saves the data, enabling centralized log management with greater efficiency.
The TS-451U supports various applications for home offices as an all-in-one Turbo NAS with cost-efficiency.
The Turbo NAS supports FTP server to share large size files, coming with user-defined settings including bandwidth limitation, number of connections, and write-only permission.
The Turbo NAS supports Web server which allows numerous websites built on the same server conveniently. Administrators can manage up to 32 websites on the single one Turbo NAS for reduced IT costs.
The Turbo NAS supports RADIUS server which provides centralized authorization management for computers to connect and use a network service.
The Turbo NAS supports VPN server which provides an easy way for IT administrators to build up a secure private network and allows the staff to log on from outside the office and access business resources securely such as files and Internet connections.
The Turbo NAS supports Printer server to send remote printing request over the Internet (max. 3 USB printers), and supports IPP (Internet Printing Protocol), Samba, print job management and Bonjour printing for Mac OS X.
The Turbo NAS supports Surveillance Station to connect and manage multiple IP cameras remotely, including real-time monitoring, video recording, playback, and event notifications.
|Highlights||QNAP TS-451U 4-bay Turbo NAS, Diskless, Intel Celeron (2.41GHz - 2.58GHz) Dual-Core Processor w/ Media Transcoding, 1GB DDR3 RAM (Up to 8GB), 512MB Flash Memory, SATA III HDD / USB 3.0 / HDMI Output, Single Power Supply, Affordable, reliable and scalable 4-bay rackmount NAS for SOHO.|
|CPU||Intel Celeron 2.41GHz dual-core processor (burst up to 2.58GHz)|
|DRAM||1GB DDR3L RAM (expandable up to 8GB)|
|Flash Memory||512MB DOM|
|Hard Disk Drive||4 x 3.5" or 2.5" SATA 6Gb/s, SATA 3Gb/s HDD or SSD|
For the HDD compatibility list, please visit www.qnap.com/compatibility
|Hard Disk Tray||4 Hot-swappable and lockable trays|
|LAN Port||2 x Gigabit RJ-45 Ethernet port|
|LED Indicators||Status, LAN, USB, HDD 1, HDD 2, HDD3, HDD4|
|USB||3x USB 3.0 port (front: 1, rear: 2)|
2x USB 2.0 port (rear)USB UPS etc.
|Buttons||Power, USB One-Touch-Copy, reset|
|Alarm Buzzer||System Warning|
|Form Factor||1U, rack mountable|
|Dimensions||44 x 439 x 499 mm (H x W x D)|
1.73 x 17.28 x 19.65 inch (H x W x D)
|Weight||Net weight: 7.63 kg (16.82 lbs)|
Gross weight: 11.60 kg (25.57 lbs)
|Power Consumption||HDD standby: 21.03W|
In operation: 38.01W
(with 4 x 2TB HDD installed)
|Power Supply||Input: 100-240V AC, 50/60Hz; Output: 250W|
|Fan||2 x quiet cooling fan (4 cm, 12V DC)|
|Operating System||QTS 4.1 (embedded Linux)|
|Supported Clients*||Windows XP, Vista, Windows 7 (32/64-bit), Windows 8 (32/64-bit), Windows Server 2003, 2008 R2, 2012, 2012 R2|
Apple Mac OS X
Linux & UNIX
|Supported Browsers||Microsoft Internet Explorer 10+|
Mozilla Firefox 8+
Apple Safari 4+
|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||Internal hard drive: EXT4|
External hard drive: EXT4, EXT3, NTFS, FAT32, HFS+
|Networking||TCP/IP (IPv4 & IPv6: Dual Stack)|
- Not all services support IPv6
Jumbo frame support
Proxy server (Squid package available in App Center)
DHCP client, DHCP server
Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
UPnP & Bonjour discovery
USB Wi-Fi 802.11ac/a/n adapter support
|Security||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 data encryption*
AES 256-bit external drive encryption*
Importable SSL certificates
Instant alert via email, SMS, beep
* The data encryption functions may not be available in accordance to the legislative restrictions of some countries (ex. Russia, Belarus, Ukraine, Kazakhstan and Uzbekistan.)
|Storage Management||QNAP flexible Volume/LUN with thin provisioning and space reclaim|
RAID 0,1, 5, 6, 10, 5+spare
Global hot spare
Supports storage pool
Online volume expansion
Online storage pool expansion
Online RAID capacity expansion and online RAID level migration
Storage expansion via a QNAP UX-1200U-RP/UX-800U-RP expansion unit
Bad block scan and hard drive S.M.A.R.T.
Bad block recovery
|Power Management||Wake on LAN|
Internal hard drive standby mode
Scheduled power on/off
Automatic power on after power recovery
USB and network UPS support with SNMP management
|Access Right Management||Batch users creation|
User quota management
Local user access control for CIFS, AFP, FTP, and WebDAV
Application access control for Photo Station, Music Station, Video Station, and File Station
Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
|Domain Authentication Integration||Microsoft Active Directory (AD) & Domain Controller support|
LDAP server, LDAP client
Domain users login via CIFS/SMB, AFP, FTP, and File Station
|myQNAPcloud Service||Private cloud storage and sharing|
Free host name registration (DDNS)
Auto router configuration (via UPnP)
Web-based file manager with HTTPS 2048-bit encryption
CloudLink for remote access without complicated router setup
myQNAPcloud connect for easy VPN connection (Windows VPN utility)
|Qsync||Syncs files among multiple devices with SSL support|
Selective synchronization for syncing specific folders only
Use team folders as a file center for greater team collaboration (maximum sync tasks: 32)
Shares files by links via email
Policy settings for conflicted files and file type filter support
Version control: up to 64 versions.
Incremental synchronization for HDD space saving
Supports Windows & Mac OS
|Web Administration||Smart toolbar and dashboard for neat system status display|
Smart fan Control
Dynamic DNS (DDNS)
SNMP (v2 & v3)
Network recycle bin for file deletion via CIFS/SMB, AFP, and File Station
- Automatic Cleanup
- File Type Filter
Comprehensive logs (events & connection)
System settings backup and restore
Restore to factory default
Mobile app: Qmanager for remote system monitoring & management
|Powerful All-in-one server|
|File Server||File sharing across Windows, Mac, and Linux/UNIX|
Advanced folder permission for CIFS/SMB, AFP, FTP
Shared folder aggregation (CIFS/SMB)
|FTP Server||FTP over SSL/TLS (Explicit)|
Passive ftp port range control
|File Station||Supports ISO Mounting (Up to 256 ISO Files)|
Supports thumbnail display of multimedia files
Supports sharing download links and upload links
Drag-n-drop Files via Google Chrome and Mozilla Firefox
Photo, music, and video preview and playback with hardware-accelerated transcoding
File Compression (ZIP or 7z)
Creation of and sending download links for sharing public files with expiration time and password protection
Support for displaying subtitles (*.SRT, UTF-8 format)
- Video seeking support for video playback during on-the-fly transcoding
- Support slideshow playback in media viewer
Mobile App: Qfile for file browsing and management
|Transcode Management||Transcode video files to 240p, 360p, 480p, 720p and 1080p resolutions|
Automatic video transcoding for watched folders
Hardware-accelerated transcoding support
Embed subtitles with videos inbackground transcoding
|Backup Station||Remote replication server (over rsync)|
Real-time remote replication (RTRR) to another QNAP NAS or FTP server
Works as both RTRR server & client with bandwidth control
Real-time & scheduled backup
Encryption, compression, file filters, and transfer rate limitations
Encrypted replication between QNAP NAS servers
Desktop backup with QNAP NetBak Replicator for Windows
Apple Time Machine backup support
Data backup to multiple external storage devices
Synchronizes with cloud storage: Amazon S3, ElephantDrive, Symform, Dropbox*, and Google Drive
Third party backup software support: Veeam backup & replication, Acronis True Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.
|Print Server||Max. number of printers: 3|
Support for Internet Printing Protocol
Print job display and management
IP-based and domain name-based privilege control
|Cloud Backup Station||Amazon S3|
WebDAV-based cloud storage
|HD (HybridDesk) Station||Playback videos, music, photos on your TV with XBMC via HDMI output|
Watch various online contents such as YouTube, Flickr, Picasa, Shoutcast, and more.
Web browser (Chrome, Firefox)
Supports USB U.S. keyboard and mouse
Supports QNAP Qremote app and the official XBMC remote app
Supports user login permissions
- The playback and quality of some video ﬁles may be affected due to the CPU and GPU decoding abilities.
- Up to 7.1 channel audio passthrough is supported
|Storage Plug & Connect||Creating and mapping shared folders usingQNAP Windows Qfinder|
Creation of and connection to iSCSI targets/LUN
|iSCSI (IP SAN)||iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined)|
Support for LUN mapping & masking
Online LUN capacity expansion
Support for SPC-3 persistent reservation
Support for 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
|Surveillance Station||Supports over 2,700 IP cameras|
Includes 2 free camera licenses, up to 24 camera channels via additional license purchase
Instant playback to check recent events
Online editing to change cameras when in live view
Visual aid by using e-maps
Playback and speed control by shuttle bar
Video preview using playback timeline
Intelligent Video Analytics (IVA) for advanced video search
Surveillance client for Mac
Mobile surveillance app: Vmobile (iOS and Android)
Mobile recording app: Vcam (iOS and Android)
|VPN Server||Secure remote access: PPTP & OpenVPN VPN services|
Max number of clients: 30
|VPN Client||Supported VPN protocols: PPTP & OpenVPN services|
PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2
PPTP Encryption: None, AES 40/128 bit, AES 256 bit
OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit
Transmission package monitor
OpenVPN port control
OpenVPN link compression
|DLNA Server||Supports DLNA/UPnP TVs and Players such as PlayStation 3 and Xbox 360|
Supported audio formats: AIFF, APE, DSD (DSF, DFF), FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM), WMA, WMA PRO, WMA VBR*
Support CUE indexing files for APE, FLAC audio format.
Video and audio on-the-ﬂy transcoding
|App Center||Over 100 official and community software add-ons (including Dropbox, Google Drive Sync, McAfee, WordPress, HappyGet II, and more.)|
Photo Station, Music Station, Video Station, Download Station, Notes Station, Signage Station, Digital TV Station (DVB-T only)
|Package Content||TS-451U x 1|
Power Cord x 1
Ethernet Cable x 2
Hard disk tray key x 1
Quick installation guide x 1
Flat head screw x 12 (for 2.5" HDD)
Flat head screw x 16 (for 3.5" HDD)