How to recover data from QNAP TL-D800C 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-D800C

QNAP TL-D800C 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-D800C.

How to recover data from NAS QNAP TL-D800C

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 improper shutdown or unclean system reboots lead to data loss on NAS QNAP TL-D800C devices?

Improper shutdown or unclean system reboots can potentially lead to data loss on any storage device, including NAS devices like the QNAP TL-D800C. When a NAS is not shut down properly, there is a risk of data corruption or files becoming inaccessible.

During a normal shutdown, the NAS goes through a proper process of closing open files, saving data, and safely shutting down the system. If the shutdown is abrupt or forced, such as a power outage or manually turning off the device, there is a higher chance of data loss or corruption.

Similarly, an unclean system reboot, where the NAS is restarted without following the proper procedure, can also result in data loss. This can happen if the NAS is not given enough time to save and close files before rebooting or if there are underlying issues with the system.

To minimize the risk of data loss, it is important to ensure that the NAS is shut down properly using the appropriate shutdown procedure. This may involve using the NAS management interface or software to initiate the shutdown process. Additionally, it is recommended to have regular backups of important data stored on the NAS to mitigate the impact of any potential data loss.

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

Although NAS TL-D800C 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-D800C. 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-D800C 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-D800C 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-D800C, feel free to leave a comment!
  • Rathbone Absalom
    Rathbone Absalom 17.09.2023 01:41 #
    Is it possible to recover data from a NAS QNAP TL-D800C device that has been affected by a controller card failure or interface problem?
    • Hetman Software
      Hetman Software 17.09.2023 03:00 #

      Yes, it is possible to recover data from a NAS QNAP TL-D800C device that has been affected by a controller card failure or interface problem. However, the process may vary depending on the specific issue and the extent of the damage.

      Here are a few steps you can take to attempt data recovery:

      1. Check the physical connections: Ensure that all cables and connections are secure and properly connected. Sometimes, loose connections can cause interface problems.
      2. Replace the controller card: If the controller card has failed, you may need to replace it with a new one. Contact QNAP support or a professional data recovery service for assistance in obtaining a compatible replacement card.
      3. Seek professional help: If the above steps do not resolve the issue, it is recommended to contact a professional data recovery service. They have specialized tools and expertise to deal with complex data recovery scenarios. They can diagnose the problem, repair or replace faulty components, and recover the data from the NAS device.

      Remember to avoid attempting any DIY repairs or data recovery methods if you are not familiar with the process, as it may further damage the device or result in permanent data loss.

Post comment
Leave a reply
Your email address will not be published. Required fields are marked *

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 steps involved in connecting an IP camera to a QNAP TL-D800C NAS?

    To connect an IP camera to a QNAP TL-D800C NAS, follow these steps:

    1. Ensure that your IP camera is compatible with the QNAP NAS. Check the QNAP website or user manual for a list of supported IP camera models.
    2. Connect the IP camera to your local network. This can be done either through a wired Ethernet connection or wirelessly, depending on the camera's capabilities.
    3. Power on the IP camera and make sure it is properly configured. Follow the camera's user manual to set up network settings, such as obtaining an IP address, subnet mask, and gateway.
    4. On your computer or mobile device, open a web browser and enter the IP address of the IP camera. This will allow you to access the camera's web interface.
    5. Log in to the camera's web interface using the provided username and password. This may vary depending on the camera model.
    6. Configure the IP camera's settings according to your preferences. This includes adjusting video quality, motion detection settings, and recording schedules. Refer to the camera's user manual for detailed instructions on configuring its settings.
    7. On your QNAP NAS, open the QVR Pro application. QVR Pro is a surveillance management software provided by QNAP.
    8. In the QVR Pro application, go to the "Camera" tab and click on "Add Camera."
    9. Select the option to add an IP camera and enter the necessary details, such as the camera's IP address, port number, and login credentials.
    10. Click on "Test Connection" to verify that the QNAP NAS can successfully connect to the IP camera. If the connection is successful, click on "Apply" to save the settings.
    11. Repeat the above steps if you have multiple IP cameras to connect to the QNAP NAS.
    12. Once all the IP cameras are connected, you can use the QVR Pro application to manage and monitor the cameras, view live video feeds, and access recorded footage.

    Note: The above steps are a general guideline and may vary slightly depending on the specific IP camera model and the version of QVR Pro software installed on the QNAP NAS. It is recommended to refer to the user manuals or documentation provided by QNAP and the IP camera manufacturer for detailed instructions.

  • What are the advantages of connecting an IP camera to a NAS like QNAP TL-D800C instead of using a separate storage device?

    There are several advantages of connecting an IP camera to a NAS like QNAP TL-D800C instead of using a separate storage device:

    1. Centralized storage: By connecting the IP camera directly to a NAS, you can centralize all your surveillance footage in one location. This makes it easier to manage and access the recorded videos, as you don't have to navigate through different storage devices.
    2. Cost-effective: Using a NAS for storage eliminates the need for separate storage devices, which can be expensive. It allows you to utilize the existing storage capacity of the NAS, making it a cost-effective solution for storing surveillance footage.
    3. Scalability: NAS devices like QNAP TL-D800C often offer expandable storage options, allowing you to increase the storage capacity as your surveillance needs grow. This scalability ensures that you don't run out of storage space and can accommodate a larger number of IP cameras if required.
    4. Data protection: NAS devices typically offer advanced data protection features such as RAID configurations, snapshot backups, and encryption. These features ensure the safety and integrity of your surveillance footage, protecting it from data loss or unauthorized access.
    5. Remote access and monitoring: With a NAS, you can access and monitor your surveillance footage remotely from anywhere using a web browser or mobile app. This enables you to keep an eye on your premises even when you are away, providing added convenience and security.
    6. Integration with other NAS features: NAS devices often come with additional features like video management software, motion detection, and event notifications. These features can be integrated with the IP camera system, providing enhanced functionality and making it easier to manage and analyze the recorded videos.

    Overall, connecting an IP camera to a NAS offers a more centralized, cost-effective, scalable, and secure solution for storing and managing surveillance footage compared to using a separate storage device.

  • Are there any specific requirements or compatibility issues to consider when connecting a particular IP camera model to a QNAP TL-D800C NAS?

    To connect an IP camera to a QNAP TL-D800C NAS, you need to consider the following requirements and compatibility issues:

    1. Camera Compatibility: Ensure that the IP camera model you are using is compatible with QNAP NAS. QNAP provides a list of compatible IP camera models on their website. Check if your camera model is listed or if it supports standard protocols like ONVIF or RTSP.
    2. Network Connectivity: Ensure that both the IP camera and the QNAP NAS are connected to the same network. The camera should have a network connection (wired or wireless) and the NAS should be connected to the network via Ethernet.
    3. Camera Configuration: Configure the IP camera with the appropriate settings, such as IP address, username, and password. Make sure to note down these details as you will need them to set up the camera on the NAS.
    4. Surveillance Station Compatibility: The QNAP TL-D800C NAS comes with Surveillance Station, a software application for managing IP cameras. Ensure that the version of Surveillance Station installed on the NAS is compatible with your IP camera model. You can check the Surveillance Station compatibility list on the QNAP website.
    5. Camera Setup on NAS: Access the QNAP NAS web interface and install the Surveillance Station app if it's not already installed. Then, follow the instructions provided by QNAP to add and configure your IP camera within Surveillance Station. You will need to provide the IP address, username, and password of the camera during this setup process.

    By considering these requirements and compatibility issues, you can successfully connect your specific IP camera model to a QNAP TL-D800C NAS.

Hello! This is AI-based Hetman Software virtual assistant, and it will answer any of your questions right away.
Start Chat