How to recover data from QNAP TVS-872XU NAS

Is your network drive gone, and you are wondering what to do? Has a RAID system crashed, and your files are no longer accessible? Does your device display an error while booting? Have you accidentally rebuilt your RAID system? Are several hard disks out of order?

How to recover data from NAS QNAP TVS-872XU

QNAP TVS-872XU NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TVS-872XU.

How to recover data from NAS QNAP TVS-872XU

Recover data from damaged RAID arrays inaccessible from a computer.

Why can’t ordinary software tools restore files from RAID?

Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.

Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.

Various RAID levels store information in different ways. Additionally, manufacturers like QNAP also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Are there any recommended steps to take after detecting or suspecting data loss on a NAS QNAP TVS-872XU device?

If you suspect or detect data loss on a QNAP TVS-872XU NAS device, here are some recommended steps to take:

  1. Stop using the NAS: As soon as you suspect data loss, stop all operations on the NAS device to prevent any further damage or overwriting of data.
  2. Verify the data loss: Check if the data is actually lost or inaccessible. Ensure that the issue is not due to a network problem, misconfiguration, or user error.
  3. Contact QNAP support: Reach out to QNAP support for assistance. Provide them with detailed information about the problem, any error messages received, and the steps you have taken so far.
  4. Perform basic troubleshooting: QNAP support might guide you through basic troubleshooting steps to determine the cause of data loss and potential solutions.
  5. Check hardware and connections: Verify that all hardware components, cables, and connections are properly connected and working. A faulty connection or hardware issue could cause data loss or inaccessibility.
  6. Check storage pool and volume status: Use the QNAP management interface to check the status of your storage pool and volumes. Ensure that they are healthy and not in a degraded state.
  7. Run data recovery tools: If the data loss is confirmed, QNAP support might recommend using their data recovery tools or suggest third-party data recovery software to attempt recovering the lost data. Follow their instructions carefully.
  8. Restore from backup: If you have a recent backup of your data, restore it to the NAS device. This will help you recover your lost data quickly and efficiently.
  9. Learn from the incident: Analyze the cause of the data loss incident and take steps to prevent it from happening again in the future. This may include implementing backup strategies, redundant storage configurations, or better data management practices.

Remember, it is crucial to seek guidance from QNAP support as they are experts in dealing with their specific devices and can provide tailored assistance based on your situation.

How to take hard disks out of the NAS and connect them to a PC?

Although NAS TVS-872XU can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:

  1. Turn off the storage and disconnect it from the power supply.

    WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.

  2. Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.

  3. Make sure to mark each hard disk in accordance with how they were installed inside the NAS.

  4. Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

Hetman Raid Recovery

This program recovers data from damaged RAID arrays and is fully compatible with QNAP TVS-872XU. The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.

Go to view
How to recover data from a QNAP

How to recover data from a QNAP

TVS-872XU has 8 HDD slots, and it supports the following array types:

  • RAID 50;
  • RAID 60;
  • RAID 6;
  • RAID 5;
  • RAID 10;
  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

  • ZFS;
  • EXT4;
  • EXT3;
  • exFAT;
  • FAT32 (External Disk Only);
  • NTFS (External Disk Only);
  • HFS+ (External Disk Read Only);

Safe recovery from disk images

This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:

  • Overwriting during the recovery process;
  • Loss resulting from bad sectors;
  • User mistakes.

To create an image, do the following:

  1. Make sure that you have enough free space to save the image. The image file size usually equals the disk size.

  2. Select the disk in the main window, and choose from the menu ToolsSave Disk. You can select multiple disks to be saved.

  3. When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.

    Hetman Raid Recovery: Image Creation Wizard
  4. At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.

    Hetman Raid Recovery: hoose any disk connected to this PC, or save the image by FTP

Where are user’s files stored?

The QNAP TVS-872XU network-attached storage keeps QTS (QuTS hero) operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

Comparison of software for RAID recovery

Product Operating system License type RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
DiskInternals RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Paid Yes, over 200 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Paid Yes, over 1,000 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Paid Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows Free Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes


We will be happy to answer your questions!

Comments (3)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 9.08.2022 12:31 #
    If you want to ask a question about data recovery, from NAS TVS-872XU, feel free to leave a comment!
  • Heywood Ellsworth
    Heywood Ellsworth 16.09.2023 23:56 #
    Can data recovery from a NAS QNAP TVS-872XU device be done if the device is showing signs of hardware failure?
    • Hetman Software
      Hetman Software 17.09.2023 01:00 #

      Yes, data recovery from a NAS QNAP TVS-872XU device can be possible even if the device is exhibiting signs of hardware failure. However, the success of the data recovery process would depend on the extent of the hardware failure and the specific issue causing the failure.

      In such cases, it is recommended to contact a professional data recovery service provider who specializes in NAS devices and has experience with QNAP systems. They can assess the situation, diagnose the hardware issue, and attempt to recover the data using specialized tools and techniques.

      It is important to note that data recovery from a failed NAS device can be a complex and time-consuming process. It is always advisable to regularly backup your data to avoid potential data loss situations.

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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What are the key features and benefits of using the NAS QNAP TVS-872XU as central storage?

    The QNAP TVS-872XU is a high-performance NAS (Network Attached Storage) device designed for central storage purposes. Some key features and benefits of using it as central storage are:

    1. High Storage Capacity: The TVS-872XU offers a large storage capacity, allowing you to store and manage a significant amount of data in one centralized location. It supports up to 8 hard drives, providing ample space for your files and applications.
    2. High Performance: This NAS is equipped with a powerful Intel Xeon processor and up to 64GB of DDR4 memory, ensuring fast and efficient data processing. It also supports 10GbE connectivity, enabling high-speed data transfers and reducing latency.
    3. Scalability: The TVS-872XU is highly scalable, allowing you to expand your storage capacity as your needs grow. You can easily add additional hard drives or connect expansion units to accommodate more data.
    4. Data Protection: QNAP NAS devices offer various data protection features, such as RAID configurations, snapshot technology, and backup solutions. The TVS-872XU supports multiple RAID levels, ensuring data redundancy and protection against drive failures.
    5. Centralized File Management: With the TVS-872XU as central storage, you can consolidate all your files and data in one location. This allows for easy access and management, simplifying workflows and improving productivity.
    6. Virtualization Support: The NAS supports virtualization technologies like VMware, Citrix, and Microsoft Hyper-V, allowing you to create virtual machines and run multiple operating systems on a single device. This enhances resource utilization and provides flexibility in deploying applications.
    7. Collaboration and Sharing: QNAP NAS devices come with built-in collaboration and sharing features. The TVS-872XU supports file sharing, remote access, and synchronization across multiple devices, facilitating collaboration among team members and remote access to files.
    8. Application Ecosystem: QNAP NAS devices have an extensive application ecosystem, providing a wide range of applications for different purposes. Whether it's media streaming, surveillance, or data backup, you can find and install applications to suit your specific needs.

    Overall, the QNAP TVS-872XU offers high performance, scalability, data protection, and centralized management, making it an ideal choice for central storage in both personal and business environments.

  • How does the QNAP TVS-872XU ensure data security and reliability for centralized storage?

    The QNAP TVS-872XU ensures data security and reliability for centralized storage through several features and technologies:

    1. RAID Protection: The TVS-872XU supports various RAID configurations, including RAID 0, 1, 5, 6, 10, 50, and 60. This allows for data redundancy and protection against drive failures.
    2. Snapshot Protection: The NAS supports snapshot technology, which allows users to take point-in-time snapshots of their data. In case of accidental file deletion or modification, snapshots can be used to quickly restore data to a previous state.
    3. AES 256-bit Encryption: The TVS-872XU supports hardware-accelerated AES 256-bit encryption. This ensures that data stored on the NAS is encrypted and protected from unauthorized access.
    4. Antivirus Protection: QNAP provides built-in antivirus software that can be installed on the TVS-872XU. It scans files and folders for malware and viruses, helping to prevent data corruption and loss.
    5. Network Security: The NAS supports various network security protocols, including SSL/TLS encryption, IP blocking, and access control lists. These features help protect the NAS from unauthorized access and ensure data security during transmission.
    6. Redundant Power Supplies: The TVS-872XU comes with dual redundant power supplies, ensuring continuous operation even if one power supply fails. This helps to prevent data loss due to power outages or power supply failures.
    7. Hot-swappable Hard Drives: The NAS supports hot-swappable hard drives, allowing users to replace failed drives without shutting down the system. This minimizes downtime and ensures continuous availability of data.
    8. Backup and Disaster Recovery: The TVS-872XU supports various backup options, including local backup to external drives, remote backup to other QNAP devices or cloud storage, and snapshot replication to remote servers. These features help create multiple copies of data for disaster recovery purposes.

    Overall, the QNAP TVS-872XU incorporates various data protection mechanisms, encryption, redundancy, and backup options to ensure data security and reliability for centralized storage.

  • Can you provide examples of industries or businesses that can benefit from using the QNAP TVS-872XU as their central storage solution?

    Sure! The QNAP TVS-872XU can be beneficial for various industries and businesses that require a reliable and high-performance central storage solution. Here are a few examples:

    1. Media and Entertainment: Film production companies, video editing studios, and media houses can benefit from the TVS-872XU's fast data transfer speeds and large storage capacity. It allows them to store and access large video files, collaborate on projects, and seamlessly edit and render high-resolution videos.
    2. Architecture and Engineering: Architectural firms, engineering companies, and design studios often deal with large design files and 3D models. The TVS-872XU provides ample storage space and supports high-speed file sharing, enabling multiple users to collaborate on projects simultaneously.
    3. Photography and Videography: Professional photographers and videographers who deal with high-resolution images and videos can benefit from the TVS-872XU's large storage capacity and fast file transfer speeds. It allows for efficient organization, backup, and easy access to their media files.
    4. Research and Development: Research institutions, laboratories, and universities often generate vast amounts of data that need to be stored securely and accessed by multiple researchers. The TVS-872XU can provide reliable and scalable storage for research data, facilitating collaboration and analysis.
    5. Small and Medium-sized Businesses (SMBs): SMBs in various industries, such as marketing agencies, graphic design firms, and software development companies, can benefit from the TVS-872XU's centralized storage solution. It enables efficient data management, backup, and file sharing, improving productivity and collaboration within the organization.
    6. Surveillance and Security: The TVS-872XU can also serve as a central storage solution for surveillance and security systems. It supports IP camera integration, allowing for video recording, storage, and management of surveillance footage in one centralized location.

    These are just a few examples, and the TVS-872XU's capabilities make it suitable for a wide range of industries and businesses that require reliable, high-performance, and scalable storage solutions.

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