How to recover data from QNAP VS-8148U-RP 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-8148U-RP Pro

QNAP VS-8148U-RP 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-8148U-RP Pro.

How to recover data from NAS QNAP VS-8148U-RP 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.

How can regular data verification or checksum processes help maintain data integrity on NAS QNAP VS-8148U-RP Pro devices?

Regular data verification or checksum processes can help maintain data integrity on NAS QNAP VS-8148U-RP Pro devices in the following ways:

  1. Detecting Data Corruption: Data verification processes involve comparing the checksums of files or data blocks with their expected values. If the checksums do not match, it indicates that the data has been corrupted. Regular verification helps identify corrupted data early on, allowing for prompt action to restore or replace the affected files.
  2. Preventing Silent Data Corruption: Silent data corruption refers to errors that occur during data storage or transmission without being detected by the system. By regularly running checksum processes, you can identify silent data corruption and take corrective measures before it leads to significant data loss or system failures.
  3. Ensuring Data Integrity during Transfer: When transferring data to or from the NAS device, checksum processes can verify the integrity of the transferred data. By comparing the checksums before and after the transfer, you can ensure that the data has been successfully and accurately transferred without any corruption or modification.
  4. Early Detection of Hardware Issues: Regular data verification can also help identify potential hardware issues within the NAS device. If checksum mismatches occur frequently or consistently, it may indicate problems with the storage media, memory, or other components. Identifying these issues early can help prevent data loss and allow for timely repairs or replacements.
  5. Maintaining Data Consistency: By regularly verifying the integrity of data stored on the NAS device, you can ensure that it remains consistent over time. This is particularly important in environments where multiple users or applications access and modify the data. Regular verification helps identify any inconsistencies or discrepancies that may arise due to accidental or unauthorized modifications.

Overall, regular data verification or checksum processes provide an additional layer of protection against data corruption, silent errors, and hardware issues. By incorporating these processes into your data management practices, you can enhance the reliability and integrity of your data on QNAP VS-8148U-RP Pro devices.

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

Although NAS VS-8148U-RP 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-8148U-RP 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-8148U-RP Pro 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 VS-8148U-RP 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-8148U-RP Pro, feel free to leave a comment!
  • Jameson Agar-Ellis
    Jameson Agar-Ellis 16.09.2023 08:41 #
    How to make backup for NAS QNAP VS-8148U-RP Pro?
    • Hetman Software
      Hetman Software 16.09.2023 09:59 #

      To make a backup for your QNAP VS-8148U-RP Pro NAS, you can follow these steps:

      1. Connect an external storage device: Connect an external USB drive or another NAS device to your QNAP NAS. Ensure that the external storage device has enough space to accommodate the backup data.
      2. Log in to the QNAP NAS: Open a web browser and enter the IP address of your QNAP NAS. Log in with your admin credentials.
      3. Open Backup Station: Once logged in, navigate to "Backup Station" in the main menu.
      4. Select "Remote Replication": In the Backup Station, select "Remote Replication" to initiate the backup process.
      5. Choose the source and destination: Select the source folders or files that you want to back up from your QNAP NAS. Then, choose the destination device where you want to store the backup.
      6. Configure backup settings: Configure the backup settings according to your preferences. You can choose the backup type (full, incremental, or differential), schedule the backup frequency, and set up email notifications for backup completion.
      7. Start the backup: Once all the settings are configured, click on the "Start Now" or "Apply" button to initiate the backup process. The backup will start, and you can monitor the progress from the Backup Station.
      8. Verify the backup: After the backup completes, verify the backup by checking the destination device. Ensure that all the files and folders are backed up correctly.

      It is recommended to periodically check the backup status, update the backup settings, and test the restore process to ensure the backup's reliability.

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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

  • Which operating systems are compatible with the NAS QNAP VS-8148U-RP Pro?

    The NAS QNAP VS-8148U-RP Pro is compatible with the following operating systems:

    1. QTS (QNAP Turbo NAS System): This is the default operating system provided by QNAP for their NAS devices.
    2. Windows: The NAS supports Windows operating systems, including Windows 7, Windows 8, Windows 10, Windows Server 2012, Windows Server 2016, and Windows Server 2019.
    3. Mac OS: It is compatible with Mac OS X 10.7 or later versions.
    4. Linux: The NAS supports various Linux distributions, including Ubuntu, Fedora, CentOS, and Debian.
    5. UNIX: It is compatible with UNIX-based operating systems.
    6. VMware: The NAS is certified for VMware vSphere ESXi 6.5, 6.7, and 7.0.
    7. Citrix: It is compatible with Citrix XenServer 7.1 or later versions.

    It is always recommended to check the official QNAP website or product documentation for the most up-to-date information on operating system compatibility.

  • Can the NAS QNAP VS-8148U-RP Pro be used with Windows operating systems?

    Yes, the NAS QNAP VS-8148U-RP Pro can be used with Windows operating systems. It is compatible with various Windows versions, including Windows 7, Windows 8, and Windows 10. It can be accessed and managed through the QTS operating system, which provides a user-friendly interface for Windows users to access and manage their data on the NAS.

  • Are there any specific operating system requirements for setting up the NAS QNAP VS-8148U-RP Pro?

    Yes, there are specific operating system requirements for setting up the NAS QNAP VS-8148U-RP Pro. According to the official QNAP website, the supported operating systems for this NAS model are:

    • QTS (QNAP Turbo NAS System): QTS 4.3.3 (or later versions)
    • Windows: Windows 7 (or later versions)
    • Mac: Mac OS X 10.7 (or later versions)
    • Linux and UNIX

    Please note that the specific version of QTS mentioned above is the minimum requirement, and it is always recommended to use the latest version available for optimal performance and security.

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