QNAP TS-531X – High-performance, Quad-core, 5-bay Business NAS with Integrated Dual 10GbE SFP+ Ports and Upgraded 1.7 GHz CPU
The TS-531X supports 5 hard drives and comes with two built-in 10GbE SFP+ ports to fully support 10GbE network environments. Equipped with a strong hardware-accelerated encryption engine, it doubles the encrypted file transfer performance, providing a secure and reliable quad-core NAS solution. Powered by the QTS operating system, the TS-531X provides versatile all-in-one server functionalities and unique features including Container Station, which allows users to rapidly develop and deploy Internet of Things (IoT) apps, and VJBOD (Virtual JBOD), which introduces an economical way to utilize the TS-531X's unused NAS storage space for expanding the storage capacity of other QNAP NAS.
The TS-531X is a cost-effective storage solution designed for growing businesses looking for backup, restoration, private cloud, storage for virtualization, and to future-proof their IT infrastructure for 10GbE networks.
- 10GbE readiness, SSD cache, and hardware-accelerated encryption engine
- VJBOD allows using the TS-531X to expand the storage capacity of other QNAP NAS
- Enjoy containerized virtualization and IoT app development with Container Station
- Build a private cloud to centrally organize & manage files and backup tasks
- Secure access with VPN Server & VPN Client
- Quickly find files using a real-time, natural search with Qsirch
- Centrally manage multiple email accounts with QmailAgent
- Easily manage contact information on your NAS with Qcontactz
- Expand the storage capacity to 21 drives by using QNAP expansion enclosures
Quad-core 1.7 GHz* CPU, 2GB/8GB RAM and Hardware-accelerated Encryption
The TS-531X is equipped with a quad-core AnnapurnaLabs, an Amazon company Alpine AL-314 1.7GHz processor by Amazon® and 2GB/8GB DDR3 RAM (upgradable to 16GB). Coupled with SATA 6Gb/s, two 10GbE SFP+ LAN ports and two Gigabit LAN ports, the TS-531X delivers up to 1723 MB/s throughput. The TS-531X also features hardware-accelerated encryption to deliver up to 298 MB/s throughput with AES 256-bit volume-based data encryption, boosting system performance & security while ensuring the safety of sensitive business data stored in the NAS.
* Newly upgraded from 1.4 GHz NAS model.
10GbE-ready with Built-in 10GbE SFP+ Ports and Supports 10GBASE-T LAN Card
The TS-531X provides not only two Gigabit Ethernet ports but also two 10GbE SFP+ ports to fully support 10GbE high-speed networks, delivering lightning-fast throughput for businesses that demand higher bandwidth for virtualization and fast backup & restoration for an ever-growing amount of data. The extra PCIe slot allows for the installation of a third 10GbE port for flexible high-speed network deployment. Coupled with its large storage capacity potential, the 10GbE-ready TS-531X is perfect for companies to store massive amounts of data and excel in fast data transmission.
QM2 Expansion Card Redeﬁnes NAS Function
QNAP's QM2 is a PCIe expansion card that features dual M.2 SSD slots and 10GbE connectivity* (individual cards may vary in functionality). This allows users to easily set up SSD caching to optimize NAS performance. 10GbE-compatible models can also future proof the TS-531X for use with 10GbE networks. Equipped with a dedicated cooling module, the QM2 can maintain its high performance even when tasked with the highest workloads.
* Selected models with 10GbE connectivity is backward compatible with 5GbE/2.5GbE/1GbE/100MbE network.
Learn more: QM2
SSD Cache Acceleration
The TS-531X supports SSD caching to greatly boost the IOPS performance of storage volumes and increase operational efficiency. It is perfect for improving the overall workflow of IOPS-demanding applications and allows the best of both cost and performance by combining SSDs with HDDs.
Learn more: SSD cache
VJBOD: Maximize Storage Utilization Across Multiple QNAP NAS
Besides using expansion enclosures, there is an additional option to expand NAS storage capacity. QNAP VJBOD (Virtual JBOD) is network-based JBOD, allowing you to expand the storage of a QNAP NAS with multiple QNAP NAS units. The TS-531X offers great potential for economically expanding the storage of other QNAP NAS with VJBOD, and to create virtual storage pools and volumes on virtual disks for operating NAS services.
Please note: ARM-based NAS currently does not support VJBOD "Host" function to utilize other NAS storage space.
Learn more: VJBOD
Rapidly Deploy IoT Apps with Container Station
QNAP Container Station exclusively integrates LXC and Docker® lightweight virtualization technologies, allowing you to operate multiple isolated Linux® systems on the TS-531X as well as download apps from the built-in Docker Hub® Registry. It supports container import/export and permission settings, and features an informative dashboard and flexible user interface for you to manage multiple containers. What's more, Container Station provides an ideal platform with countless hands-on containerized apps for developers to easily apply, rapidly develop, and conveniently deploy IoT applications. Simply search for "IoT" in Container Station, acquire proper containers, and create your diverse IoT applications.
QmailAgent: A Mailroom Center for Your Private Cloud
QmailAgent is an online email client that helps you manage multiple email accounts, allowing you to access all of your emails and to easily switch between different accounts. It provides complete functionality for composing, reading and organizing emails. You can even attach files, photos and documents directly from the TS-531X when composing emails. iOS® and Android™ users can use the QmailClient app to quickly check multiple email accounts with mobile devices, and to browse & send emails using the QmailAgent on their TS-531X. You can use QmailAgent together with Qsirch, which supports searching through the .eml files stored on the TS-531X, to make searching through and managing massive amounts of emails much easier.
Learn more: QmailAgent
Qcontactz: Easily Manage Huge Amounts of Contacts on the NAS
Qcontactz is a dedicated app for centrally storing and managing contact information for colleagues, business partners, family, and more. A near-limitless number of contacts can be stored on the TS-531X, with the ability to sort them into groups and to encrypt sensitive/confidential contact information. Qcontactz supports manually adding contact information and importing from multiple Google accounts, CSV files, and vCARD 3.0 files. Qcontactz can also export contacts as CSV or vCARD 3.0 files. Important and frequently-used contacts are also automatically learned by Qcontactz for greater organization, and a smart search function is provided. Qcontactz offers snapshot backups that enable you to revert to a previous version of your contacts list according to your needs. A companion app for iPhone and Android phones is also available for transferring contacts from your phone to your NAS and to remotely access all of the your contacts stored on the NAS.
Learn more: Qcontactz
All-new Notes Station 3: handy private cloud notepad featuring collaborative writing function
The revamped Notes Station features an optimized interface for a smoother user experience. Notes Station allows users to collectively write documents and helps users to track changes by keeping the revision history of documents. Notes Station provides useful image-editing tools, helping you create well-designed documents. You can also create sharing links to share documents in real time. Documents can be encrypted to prevent unauthorized access, and snapshot backup is provided to retain different versions of documents edited at different time periods. With its importing/exporting and full-site backup functions, Notes Station supports backing up your documents to local or remote QNAP NAS.
Note: Notes Station 3 will be available from QTS 4.3.
QTS - Simple and efficient
Thanks to the intuitive QTS user interface, your NAS experience is smarter, smoother and spectacular. Its modern flat design streamlines loading times, and the intelligent desktop allows you to quickly find desired functions, 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 working efficiency. QTS breaks the barriers of devices, platforms and geography to bring optimized cloud experiences to you.
Learn more: QTS
Cross-platform File Sharing, Centralized Data Storage
The TS-531X 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-531X 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-531X supports SAMBA v4 and can act as a Windows domain controller to manage privilege settings.
Centralize Backup, Restoration and Synchronization with Hybrid Backup Sync
Hybrid Backup Sync consolidates backup, restoration and synchronization functions into a single QTS app (via RTRR, rsync, FTP, and CIFS/SMB protocols) and provides comprehensive data backup and disaster recovery solutions by easily transferring data to local/remote QNAP NAS, remote servers, and to cloud storage spaces. You can synchronize files between the TS-531X and cloud storage in real time (including Amazon® Glacier, Azure™ Storage, Google Cloud Storage™, Google Drive™, Microsoft® OneDrive®, Dropbox®, Amazon® Drive, Yandex® Disk, Box®, Amazon® S3, OpenStack Swift and WebDAV cloud services). Hybrid Backup Sync supports multi-version backup, flexible job scheduling, file compression, and more.
Comprehensive Security Options
In open network environments, business data may be exposed in a potential hack. The TS-531X provides numerous security options, such as antivirus, encrypted access, IP blocking, 2-step verification, and more. IT administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-531X supports AES 256-bit encryption, preventing sensitive business data from unauthorized access and breach even if the hard drives or the entire system were stolen.
Secure Access with VPN Server & VPN Client
The TS-531X can be used as a VPN server with L2TP/IPsec, OpenVPN, and PPTP support, allowing you to securely access data shared within private local networks. It can also be used as a VPN Client to connect to other VPN servers (connecting multiple servers at the same time is possible) or virtual private networks through PPTP and OpenVPN for secure data transmission. You can connect devices to your NAS and the VPN server at home to access data on the LAN; via VPN Client on your NAS, for example, you can connect to VPN servers in foreign countries for accessing regionally-restricted services.
Qsirch - A Smarter, Faster Way to Search
The TS-531X supports Qsirch, a proprietary search engine for quick file searching. In addition to previewing files with thumbnails, content abstract and keyword hints, Qsirch allows you to search through .eml files stored on the TS-531X and to 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. The Qsirch Helper extension (for Google Chrome™ and Mozilla Firefox) can also be used to search for files on your NAS when using Google Search™. Qsirch is a huge productivity boost that greatly reduces the time spent looking for files on the NAS, allowing you to focus on other tasks.
Learn more: Qsirch
File Synchronization Across Multiple Devices
Qsync utility turns your TS-531X into a safe, high-capacity data center for file synchronization. Any file uploaded to the TS-531X 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 up-to-date files on different devices. Qsync provides multiple ways for file synchronization and group file sharing, greatly enhancing the flexibility of team projects and collaboration.
Learn more: Qsync
Comprehensive Surveillance Solution Providing 24/7 Security
Surveillance Station is a professional 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, 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 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-531X. The TS-531X offers 2 free IP camera channels and you can expand up to 30 channels by purchasing additional licenses.
Install-on-demand Apps to Extend NAS Functionality
The built-in App Center 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. You can freely install apps as needed to expand your TS-531X's functionality.
Learn more: App Center
Easily Expand Storage Capacity
The TS-531X supports online capacity expansion by connecting two QNAP expansion enclosures for storing rapidly-growing data, especially ideal for storage-intensive applications such as video surveillance, data archiving, TV broadcast storage, and more. You can gradually expand the TS-531X's storage on demand, and use the QTS Storage Manager to easily handle the NAS capacity expansion and storage expansion enclosure management.
With the support of QJBOD Express (JBOD enclosures roaming)*, you can just connect a large capacity QNAP expansion enclosure to the TS-531X, and migrate data to another NAS through the JBOD enclosure without network connectivity.
* RAID groups of storage pools cannot cross multiple enclosures.
** The maximum capacity is calculated by using 10TB HDDs.
The TS-531X utilizes an energy-efficient quad-core ARM® processor that features low voltage and low power consumption, maintaining high performance in system operations and is suitable for an always-online business cloud without running up a high electricity bill. Additional energy-saving features include hard disk standby, scheduled power on/off, and Wake on LAN.
- Operating System: QTS 4.2 (embedded Linux)
- Supported Client OS
- Windows 7 (32/64-bit), Windows 8 (32/64-bit), Windows Server 2003/2008 R2/2012/2012R2
- Apple Mac OS X
- Linux & UNIX
- Supported Browsers
- Microsoft Internet Explorer 10+
- Mozilla Firefox 8+
- Apple Safari 4+
- Google Chrome
|Product||QNAP TS-531X 5-Bay QTS-Linux NAS|
|Operating System||QTS 4.2 (embedded Linux)|
|Processor||AnnapurnaLabs, Alpine AL-314 Quad-core 1.7GHz ARM® Cortex-A15 Processor (newly upgraded from 1.4 GHz)|
|System Memory||2GB DDR3L RAM
Memory modules pre-installed: 2 GB x1
|Maximum Memory||16GB max.|
|Memory slots||2 x SODIMM DDR3 slots|
|Drive Interface||5 x 3.5"/2.5" SATA 6Gb/s HDDs/SSDs|
|File System||Internal Hard Drive: EXT4
External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
|Storage Management||- QNAP flexible Volume/LUN with thin provisioning and space reclaim
- Volume types: RAID 0/1/5/6/10, + hot spare, single, JBOD
- Supports storage pools
- Online volume expansion
- Online storage pool expansion
- Online RAID capacity expansion and online RAID level migration
- SMART data migration
- Storage expansion via max 2 QNAP UX-500P/UX-800P expansion units
- JBOD enclosure roaming
- SSD read-only/read-write cache
- Bad block scan, recovery, and hard drive S.M.A.R.T.
- RAID recovery
- Bitmap support
|USB Ports||3 x USB 3.0 Type-A ports|
|10GbE LAN Ports||2 x 10 Gigabit SFP+ LAN Ports|
|GbE LAN Ports||2 x Gigabit RJ45 LAN Ports|
|PCIe Slot||1 PCIe 2.0 x2 slot|
|LED Indicators||Status/Power, LAN, USB, HDD 1-5|
|Buttons||Power, USB One-touch-copy, Reset|
|Power Consumption (W)||HDD sleep: 17.01W
Typical operation: 29.31W
|Power Supply||ATX 250W, 100-240V AC, 50-60Hz, 3.5A|
|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
|Networking||- TCP/IP (IPv4 & IPv6: Dual Stack)
- NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming)
- Service binding based on network interfaces
- Squid Proxy server
- Proxy client
- 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 Adapter Support
|Security||- Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
- CIFS host access control for shared folders
- AES 256-bit volume-based data encryption
- AES 256-bit external drive encryption
- Importable SSL certificates
- Instant alert via E-mail, SMS, beep,and push service
- 2-step verification
|Access Right Management||- Batch user creation
- Import/Export users
- 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
|Cooling||1 x 12 cm internal system fan (12 V DC)
|Sound Level||22.4 dB(A)|
|Temperature||0~40 °C (32~104 °F)|
|Humidity||5~95% RH non-condensing, wet bulb: 27 °C (80.6 °F)|
|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|
|Security||Kensington security slot|
|Dimensions (HxWxD)||185 x 210.6 x 235.4 mm (7.28" x 8.29" x 9.27")|
|Weight||5.8kg (12.8 lbs)|
- QNAP TS-531X 5-Bay NAS (2GB)
- AC Power Adapter
- Power Cord
- 2 x RJ45 Ethernet Cables
- 20 x Flat Head Screws (for 3.5" HDD)
- 15 x Flat Head Screws (for 2.5" HDD)
- Quick Installation Guide