How to recover data from QNAP TVS-471 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-471

QNAP TVS-471 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-471.

How to recover data from NAS QNAP TVS-471

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 specific precautions to take while migrating data between NAS QNAP TVS-471 devices?

Yes, there are some precautions to consider while migrating data between QNAP TVS-471 devices. Here are a few:

  1. Backup: Before starting the migration process, it is always recommended to create a backup of your data. This ensures that your data is safe in case of any unexpected issues during the migration.
  2. Check compatibility: Ensure that both the source and target QNAP TVS-471 devices are running compatible firmware versions. Check the QNAP website or user manuals for firmware compatibility details.
  3. Network stability: Make sure that the network connection between the two devices is stable and reliable. Unstable connections can cause data transfer interruptions or corruption.
  4. Synchronize data: Use QNAP's built-in data synchronization tools, such as Qsync or RTRR (Real-Time Remote Replication), to ensure that all data is up to date before starting the migration process.
  5. Plan downtime: Depending on the size and amount of data being migrated, there may be some downtime during the migration process. Plan accordingly and inform users about the temporary unavailability of the NAS.
  6. Test the migration: Before migrating all the data, it is recommended to perform a test migration with a small subset of data to ensure that the process works as expected and there are no issues.
  7. Monitor the migration process: Keep an eye on the migration process, especially if it involves a large amount of data. Monitor the progress and check for any errors or warnings that may require attention.
  8. Verify the migrated data: Once the migration is complete, verify the migrated data on the target NAS to ensure that everything has been transferred correctly. Compare file sizes, metadata, and perform random checks on various files.

By following these precautions, you can minimize the risk of data loss or corruption during the migration process between QNAP TVS-471 devices.

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

Although NAS TVS-471 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-471. 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-471 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 TVS-471 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-471, feel free to leave a comment!
  • Dorian Howlader
    Dorian Howlader 17.09.2023 21:46 #
    Can data recovery from a NAS QNAP TVS-471 device be performed without voiding the warranty?
    • Hetman Software
      Hetman Software 17.09.2023 22:59 #

      To determine whether data recovery from a QNAP TVS-471 NAS device will void the warranty, it is best to refer to the manufacturer's warranty terms and conditions. Generally, opening the device or attempting to recover data on your own may void the warranty. It is advisable to contact QNAP support or refer to the warranty documentation provided with the device for accurate information regarding data recovery and warranty coverage.

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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 available cloud services that can be used to copy files from a QNAP TVS-471 NAS device?

    There are several cloud services that can be used to copy files from a QNAP TVS-471 NAS device. Some popular options include:

    1. QNAP Cloud Drive Sync: This is a built-in cloud service provided by QNAP that allows you to sync files between your QNAP NAS and various cloud storage providers such as Dropbox, Google Drive, and Microsoft OneDrive.
    2. QNAP Hybrid Backup Sync: This is another built-in cloud service provided by QNAP that offers a comprehensive backup, restore, and synchronization solution. It supports various cloud storage providers and allows you to easily copy files to and from your QNAP NAS.
    3. Amazon S3: QNAP NAS devices support Amazon S3 cloud storage, so you can configure your NAS to directly copy files to an Amazon S3 bucket.
    4. Microsoft Azure: Similar to Amazon S3, QNAP NAS devices also support Microsoft Azure cloud storage. You can set up your NAS to copy files to an Azure storage account.
    5. Google Cloud Storage: QNAP NAS devices can also be configured to copy files to Google Cloud Storage. This allows you to store and manage your files in the Google Cloud.
    6. Dropbox: QNAP NAS devices have native support for Dropbox, so you can easily sync and copy files between your NAS and your Dropbox account.
    7. OneDrive: Similarly, QNAP NAS devices also have native support for Microsoft OneDrive. You can configure your NAS to sync and copy files to your OneDrive storage.

    These are just a few examples of the available cloud services that can be used to copy files from a QNAP TVS-471 NAS device. There may be other cloud storage providers or services that are compatible with QNAP NAS devices, depending on your specific requirements and preferences.

  • What is the process for setting up and configuring cloud services on a QNAP TVS-471 NAS for copying files to the cloud?

    To set up and configure cloud services on a QNAP TVS-471 NAS for copying files to the cloud, you can follow these steps:

    1. Connect the QNAP NAS to your network and power it on.
    2. Access the QTS (QNAP Turbo NAS System) interface by entering the NAS IP address in a web browser.
    3. Log in to the QTS interface using your administrator credentials.
    4. Once logged in, go to the "App Center" in the QTS interface.
    5. In the "App Center," search for and install the cloud service applications you want to use. Some popular options include Dropbox, Google Drive, Microsoft OneDrive, etc. Install the respective applications by following the on-screen instructions.
    6. After the installation is complete, go to the "Control Panel" in the QTS interface.
    7. In the "Control Panel," find and click on the "Cloud Backup Sync" or "Cloud Sync" option.
    8. In the Cloud Backup Sync settings, click on "Create a new sync job" or similar.
    9. Select the cloud service you want to use for file copying from the available options.
    10. Follow the on-screen instructions to authorize access to your cloud storage account and grant necessary permissions to the QNAP NAS.
    11. Configure the sync job settings, including selecting the folders or files you want to copy to the cloud, scheduling options, etc.
    12. Save the settings and start the sync job.

    Once the sync job is set up, the QNAP NAS will automatically copy the selected files or folders to the cloud storage service according to the specified schedule. You can monitor the progress and manage the sync jobs from the "Cloud Backup Sync" or "Cloud Sync" section in the QTS interface.

  • Are there any limitations or restrictions when copying files from a QNAP TVS-471 NAS to cloud services, such as file size limits or compatibility issues?

    When copying files from a QNAP TVS-471 NAS to cloud services, there may be some limitations or restrictions to consider. Here are a few common ones:

    1. File Size Limits: Cloud services often have file size limits, which can vary depending on the provider. For example, some services may limit file sizes to 2GB or 5GB. If you have larger files on your NAS, you may need to split them or find a cloud service that supports larger file sizes.
    2. Compatibility Issues: Some cloud services may have limitations on the types of files they can handle. For instance, certain file formats or file systems might not be supported. It's important to check the compatibility of your files and file systems with the cloud service you intend to use.
    3. Bandwidth and Transfer Speed: Copying large files or a significant amount of data from a NAS to a cloud service can be time-consuming due to bandwidth limitations. Uploading large files can take a long time, especially if your internet connection has slow upload speeds.
    4. Data Transfer Costs: Cloud services often have data transfer limits or charge for data transfers beyond a certain threshold. If you have a large amount of data to transfer from your NAS to the cloud, it's important to be aware of any potential costs associated with data transfers.
    5. Network Stability: Copying files from a NAS to the cloud relies on a stable network connection. If your internet connection is unreliable or frequently drops, it may interrupt or fail the file transfer process.

    It's always recommended to check the documentation and specifications of your chosen cloud service to understand any limitations or restrictions they may have before initiating file transfers.

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