How to recover data from QNAP TL-D800S 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 TL-D800S

QNAP TL-D800S NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TL-D800S.

How to recover data from NAS QNAP TL-D800S

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.

Can data be lost during the process of upgrading or updating the NAS QNAP TL-D800S device's firmware?

Yes, there is a possibility of data loss during the process of upgrading or updating the firmware of a NAS device like the QNAP TL-D800S. While the firmware update process is designed to be safe and reliable, there can be unforeseen issues or errors that can lead to data loss.

To minimize the risk of data loss during a firmware update, it is recommended to follow these precautions:

  1. Backup your data: Before initiating any firmware update, make sure to have a proper backup of all your important data stored on the NAS device. This can be done by copying the data to an external storage device or using a cloud backup service.
  2. Read the release notes: Carefully read the release notes and documentation provided by QNAP for the firmware update. It may contain important information about any potential risks or precautions to be taken during the update process.
  3. Stable power supply: Ensure that the NAS device has a stable power supply during the firmware update process. Any power interruptions or fluctuations can disrupt the update process and potentially lead to data loss.
  4. Follow instructions: Follow the instructions provided by QNAP for updating the firmware. Make sure to understand and execute each step accurately. Do not interrupt or turn off the device during the update process.
  5. Use official firmware: Only download and install firmware updates from the official QNAP website. Using unofficial or modified firmware can increase the risk of data loss.

By following these precautions, you can minimize the chances of data loss during a firmware update. However, it is always recommended to have a backup of your important data to avoid any potential loss or damage.

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

Although NAS TL-D800S 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 TL-D800S. 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

TL-D800S 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 TL-D800S 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 TL-D800S, feel free to leave a comment!
  • Trey Makins
    Trey Makins 17.09.2023 02:52 #
    How to make backup for NAS QNAP TL-D800S?
    • Hetman Software
      Hetman Software 17.09.2023 03:59 #

      To make a backup for a QNAP TL-D800S NAS, you can follow these steps:

      1. Connect External Storage: Connect an external storage device, such as a USB hard drive or a network-attached storage (NAS) device, to your QNAP TL-D800S NAS.
      2. Configure Storage: Go to the QNAP NAS web interface by entering the IP address of your NAS in a web browser. Log in with your admin credentials.
      3. Set up Backup Job: In the web interface, go to the "Backup Station" or "Backup" section, depending on the QNAP firmware version.
      4. Select Backup Source: Choose the files or folders you want to back up from the QNAP NAS. You can select specific folders or the entire NAS volume.
      5. Choose Backup Destination: Select the external storage device you connected in step 1 as the backup destination. If it's a USB hard drive, it should appear as an available option. If it's a NAS device, you may need to provide the network credentials to access it.
      6. Configure Backup Settings: Set up the backup settings according to your preferences. You can choose the backup frequency, compression level, encryption, and other options.
      7. Start Backup: Once you have configured the backup settings, click on the "Start" or "Backup Now" button to initiate the backup process.
      8. Monitor Backup Progress: You can monitor the backup progress in the QNAP web interface. Depending on the size of the data being backed up, it may take some time to complete.
      9. Verify Backup: After the backup is complete, you can verify the backup files on the external storage device to ensure that the data has been successfully backed up.

      It's recommended to periodically check and update your backup settings to ensure that your data is continuously protected.

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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

  • How does the NAS QNAP TL-D800S serve as a reliable backup solution for web hosting?

    The NAS QNAP TL-D800S can serve as a reliable backup solution for web hosting due to several key features:

    1. High storage capacity: The TL-D800S offers up to 80TB of storage capacity, allowing web hosting providers to store a large amount of data, including website files, databases, and user data.
    2. Redundancy and data protection: The NAS supports various RAID configurations, including RAID 1, 5, 6, and 10, which provide data redundancy and protection against drive failures. This ensures that even if a drive fails, the data remains accessible and can be quickly recovered.
    3. Backup and synchronization options: QNAP NAS devices come with a range of backup and synchronization tools, such as Qsync and Hybrid Backup Sync. These tools allow web hosting providers to schedule regular backups of their website data, ensuring that important files are always protected and can be restored if needed.
    4. Snapshot technology: The TL-D800S supports snapshot technology, which enables users to take point-in-time snapshots of their data. This feature allows for quick recovery in case of accidental data deletion or corruption.
    5. Remote accessibility and disaster recovery: QNAP NAS devices can be accessed remotely, allowing web hosting providers to manage and restore backups from anywhere. Additionally, the NAS can be part of a disaster recovery plan, where data can be replicated to another off-site location for added protection.
    6. Scalability and expandability: The TL-D800S can be expanded by connecting additional expansion units, allowing web hosting providers to increase storage capacity as their backup needs grow. This scalability ensures that the backup solution can accommodate future data growth.

    Overall, the NAS QNAP TL-D800S provides a reliable backup solution for web hosting by offering high storage capacity, data redundancy, backup and synchronization options, snapshot technology, remote accessibility, and scalability.

  • What are the key features and specifications of the NAS QNAP TL-D800S that make it suitable for web hosting backup?

    The NAS QNAP TL-D800S is a high-capacity storage solution designed specifically for web hosting backup. Some of its key features and specifications that make it suitable for this purpose include:

    1. High Storage Capacity: The TL-D800S supports up to 8 SATA hard drives or SSDs, allowing for a large amount of data to be stored. This high capacity is essential for web hosting backup, as it often involves dealing with a large volume of files and databases.
    2. RAID Support: It supports various RAID configurations, including RAID 0, 1, 5, 6, 10, 50, and 60. This ensures data redundancy and protection against drive failures, which is crucial for reliable web hosting backup.
    3. Hot-swappable Drive Bays: The TL-D800S features hot-swappable drive bays, allowing for easy drive replacement without interrupting the backup process. This feature ensures continuous operation and minimizes downtime.
    4. High-Speed Connectivity: It offers multiple high-speed connectivity options, including two 40GbE QSFP+ ports and two 10GbE SFP+ ports. This enables fast data transfer rates, ensuring efficient backup and recovery operations.
    5. Expansion Flexibility: The TL-D800S supports expansion units, allowing for additional storage capacity to be added as needed. This scalability is important for web hosting backup, as the storage requirements may increase over time.
    6. Snapshot and Backup Solutions: QNAP provides various snapshot and backup solutions, such as QTS Storage Manager, Hybrid Backup Sync, and QNAP Snapshot Agent. These tools enable efficient and reliable backups, ensuring data integrity and availability.
    7. File System Support: It supports multiple file systems, including EXT4, NTFS, and FAT32. This compatibility allows for easy integration with different operating systems and backup software.
    8. Remote Access and Management: The TL-D800S can be remotely accessed and managed through QNAP's intuitive web-based interface. This feature enables convenient monitoring and control of the backup process from anywhere.

    Overall, the high storage capacity, RAID support, hot-swappable drive bays, high-speed connectivity, expansion flexibility, snapshot and backup solutions, file system support, and remote access capabilities of the NAS QNAP TL-D800S make it a suitable choice for web hosting backup.

  • Can the NAS QNAP TL-D800S be seamlessly integrated with popular web hosting platforms, and what are the benefits of doing so?

    The NAS QNAP TL-D800S is primarily designed for storage and data backup purposes, rather than being directly integrated with web hosting platforms. However, it can still play a role in supporting web hosting activities indirectly. Here are a few ways it can be beneficial:

    1. Data backup: The TL-D800S provides a large storage capacity and advanced data protection features like RAID, snapshot, and backup solutions. By integrating it with a web hosting platform, you can use it to create regular backups of your website data, ensuring its safety and allowing easy restoration if needed.
    2. File sharing and collaboration: QNAP NAS devices come with built-in file sharing and collaboration features. By integrating the TL-D800S with a web hosting platform, you can use it to store and share files related to your website or web development projects. This can improve collaboration among team members and simplify file management.
    3. Content delivery: If your web hosting platform supports content delivery network (CDN) integration, you can use the TL-D800S to store and distribute website content across multiple locations. This can improve website performance and reduce latency for users in different geographical regions.
    4. Private cloud storage: QNAP NAS devices can be used to set up a private cloud storage environment. By integrating the TL-D800S with a web hosting platform, you can create a secure and scalable storage solution for your website's data, allowing you to have full control over your files and reducing reliance on third-party cloud storage services.

    While the TL-D800S may not have direct and seamless integration with popular web hosting platforms, it can still complement and enhance your web hosting activities by providing reliable storage, backup, collaboration, and content delivery capabilities.

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