How to recover data from QNAP VS-4008 Pro 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 VS-4008 Pro

QNAP VS-4008 Pro NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from VS-4008 Pro.

How to recover data from NAS QNAP VS-4008 Pro

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 inadequate cooling or high ambient temperatures impact data loss risks for NAS QNAP VS-4008 Pro devices?

Yes, inadequate cooling or high ambient temperatures can indeed impact data loss risks for NAS QNAP VS-4008 Pro devices.

NAS devices generate heat during operation, and if they are not adequately cooled, the internal components can overheat. This can lead to various issues, including data corruption or even hardware failure. The high temperatures can cause the hard drives to degrade faster, leading to potential data loss.

Additionally, high ambient temperatures can exacerbate the cooling problem. If the surrounding environment is already hot, it becomes more challenging for the NAS device to dissipate heat effectively. This can further increase the risk of overheating and subsequent data loss.

To mitigate these risks, it is essential to ensure proper cooling for the NAS device. This can be achieved by providing adequate ventilation, using cooling fans or heat sinks, and avoiding placing the NAS in areas with high ambient temperatures. Regular maintenance and cleaning of the device's cooling system can also help prevent overheating and potential data loss.

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

Although NAS VS-4008 Pro 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 VS-4008 Pro. 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

VS-4008 Pro has 4 HDD slots, and it supports the following array types:

  • 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 VS-4008 Pro 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 VS-4008 Pro, feel free to leave a comment!
  • Linus Larkin
    Linus Larkin 18.09.2023 00:40 #
    How to rebuild RAID on NAS QNAP VS-4008 Pro?
    • Hetman Software
      Hetman Software 18.09.2023 01:59 #

      To rebuild a RAID on a QNAP VS-4008 Pro NAS, you can follow these steps:

      1. Log in to the QNAP NAS web interface using an administrator account.
      2. Go to "Storage & Snapshots" and click on "Storage Manager."
      3. In the "Storage Manager" window, select the "RAID Management" tab.
      4. Locate the RAID volume that you want to rebuild and click on the "Manage" button next to it.
      5. In the RAID management window, you will see the status of the RAID volume. If it shows as "Degraded" or "Failed," you will need to rebuild it.
      6. Click on the "Rebuild" button to start the rebuilding process. The NAS will automatically start rebuilding the RAID volume using the available drives.
      7. Depending on the size of the RAID volume and the amount of data, the rebuilding process may take some time. You can monitor the progress in the RAID management window.
      8. Once the rebuilding process is complete, the RAID volume should show as "Healthy" or "Normal."

      Note: It is important to ensure that you have a backup of your data before attempting to rebuild a RAID volume. RAID rebuilds can be resource-intensive and may put stress on the drives, increasing the risk of data loss.

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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 is DLNA and how does it work?

    DLNA stands for Digital Living Network Alliance. It is a set of guidelines and standards that enable the sharing of digital media content between different devices over a home network. DLNA allows devices like smartphones, tablets, computers, TVs, and other multimedia devices to communicate and share media files seamlessly.

    DLNA works by establishing a local area network (LAN) within a home or office environment. Devices that are DLNA-certified act as either servers or clients. DLNA servers store and share media content, while DLNA clients receive and play the media content.

    Here's a simplified explanation of how DLNA works:

    1. Network Setup: Devices are connected to the same local network, either through Wi-Fi or Ethernet.
    2. Discovery: DLNA clients search for DLNA servers on the network to identify available media content.
    3. Media Selection: Once the DLNA client discovers the DLNA server, it can browse and select the desired media content, such as photos, videos, or music.
    4. Media Streaming: The DLNA server streams the selected media content to the DLNA client over the network. The server transcodes the media files if needed to ensure compatibility with the client device.
    5. Playback: The DLNA client receives the media stream and plays it on the appropriate device, such as a TV, audio system, or mobile device.

    DLNA also supports additional features like remote control functionality, allowing users to control media playback on DLNA-enabled devices using a smartphone or tablet.

    Overall, DLNA simplifies the process of sharing and streaming media content across different devices, providing a seamless multimedia experience within a home network.

  • How does a NAS (Network Attached Storage) device like QNAP VS-4008 Pro utilize DLNA protocol?

    A NAS device like the QNAP VS-4008 Pro can utilize the DLNA (Digital Living Network Alliance) protocol in several ways:

    1. Media Server: The NAS device can act as a media server, hosting and sharing multimedia content such as photos, videos, and music. It organizes the media files into a library and makes them accessible to DLNA-certified devices on the network.
    2. Media Streaming: DLNA-certified devices, such as smart TVs, game consoles, and media players, can connect to the QNAP NAS and stream media content directly from it. The DLNA protocol ensures seamless communication and compatibility between different devices.
    3. Remote Access: DLNA allows users to access their media content stored on the NAS remotely. By connecting to the NAS via the internet, users can stream their media files to DLNA-enabled devices outside their home network, provided they have appropriate access permissions.
    4. Transcoding: Some NAS devices, including the QNAP VS-4008 Pro, offer transcoding capabilities. This means that the NAS can convert media files into a format supported by the target device. For example, if a video file is in a format not compatible with a smart TV, the NAS can transcode it on-the-fly to a suitable format, allowing smooth playback.
    5. DLNA Control Point: The QNAP NAS can also function as a DLNA control point, which means it can discover and control other DLNA-certified devices on the network. Users can use their NAS to browse and play media files stored on other DLNA-enabled devices like smartphones or tablets.

    Overall, a NAS device like the QNAP VS-4008 Pro leverages the DLNA protocol to provide seamless media sharing, streaming, and remote access capabilities across multiple devices in a networked environment.

  • What are the benefits and features of DLNA in a QNAP VS-4008 Pro NAS?

    The QNAP VS-4008 Pro NAS supports DLNA (Digital Living Network Alliance) technology, which offers several benefits and features, including:

    1. Media Streaming: DLNA allows you to stream multimedia content, such as videos, photos, and music, from your NAS to DLNA-certified devices like smart TVs, game consoles, and media players. This enables easy access to your media files on multiple devices within your home network.
    2. Easy Setup: The VS-4008 Pro NAS comes with built-in DLNA support, making it convenient to set up and start streaming media content without the need for additional software or configurations.
    3. Cross-platform Compatibility: DLNA is a widely adopted standard, ensuring compatibility between different devices and operating systems. This means you can stream media from your QNAP NAS to devices running on Windows, macOS, Linux, Android, iOS, and other platforms.
    4. Remote Access: DLNA supports remote access, allowing you to stream media content from your QNAP NAS to DLNA-certified devices outside your home network. This feature is useful when you want to access your media files while on the go or share them with friends and family.
    5. Media Management: DLNA provides a standardized way to organize and manage your media files on the QNAP NAS. You can create playlists, browse through your media library, and easily search for specific content using DLNA-compatible devices.
    6. Multi-room Streaming: With DLNA, you can stream media simultaneously to multiple DLNA-certified devices in different rooms. This feature is ideal for creating a multi-room audio or video setup, allowing everyone to enjoy their preferred content at the same time.
    7. Transcoding Support: The VS-4008 Pro NAS supports transcoding, which means it can convert media files into different formats on-the-fly. This enables smooth playback on devices that may not natively support certain file formats or codecs, ensuring compatibility and a seamless streaming experience.

    Overall, DLNA support in the QNAP VS-4008 Pro NAS enhances the media streaming capabilities of the device, providing a user-friendly and versatile solution for accessing and enjoying your multimedia content across various devices.

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