How to recover data from QNAP TVS-471U 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-471U

QNAP TVS-471U 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-471U.

How to recover data from NAS QNAP TVS-471U

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.

What data recovery services or software options are available for NAS QNAP TVS-471U devices?

There are several data recovery services and software options available for NAS QNAP TVS-471U devices. Some popular options include:

  1. QNAP Data Recovery Service: QNAP offers its own data recovery service, which can help recover data from QNAP NAS devices. You can contact their support team for more information and assistance.
  2. Stellar Data Recovery: Stellar Data Recovery is a well-known data recovery software that supports NAS devices, including QNAP NAS. It offers both software-based recovery options and professional data recovery services.
  3. EaseUS Data Recovery Wizard: EaseUS Data Recovery Wizard is another popular data recovery software that supports QNAP NAS devices. It provides a user-friendly interface and can recover various types of data from NAS storage.
  4. Ontrack Data Recovery: Ontrack is a professional data recovery service provider that offers services for QNAP NAS devices. They specialize in complex data loss scenarios and provide customized recovery solutions.
  5. DiskInternals NAS Recovery: DiskInternals NAS Recovery is a software tool specifically designed for NAS data recovery. It supports QNAP NAS devices and can recover deleted files, formatted drives, and damaged RAID arrays.

It's important to note that data recovery can be a complex process, and success may vary depending on the specific situation and the severity of data loss. It's recommended to consult with a professional data recovery service provider or contact the support team of the respective software for personalized assistance.

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

Although NAS TVS-471U 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-471U. 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-471U 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-471U 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-471U, feel free to leave a comment!
  • Absalom Meo
    Absalom Meo 17.09.2023 21:41 #
    Is it possible to recover data from a NAS QNAP TVS-471U device that has been affected by a virus or malware infection?
    • Hetman Software
      Hetman Software 17.09.2023 23:00 #

      Yes, it is possible to recover data from a NAS QNAP TVS-471U device that has been affected by a virus or malware infection. However, the process can be complex and may require the assistance of a professional data recovery service.

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

      1. Disconnect the infected NAS device from the network to prevent further spread of the malware.
      2. Consult QNAP's support documentation or contact their technical support for guidance on dealing with malware infections specific to their devices.
      3. If possible, perform a malware scan on the NAS device using an antivirus software recommended by QNAP or a trusted security provider.
      4. If the malware removal process is successful, you should be able to access your data again. However, it is essential to ensure that the malware has been completely removed from the device before reconnecting it to the network.
      5. If the malware removal process is unsuccessful or if the data is still inaccessible, it is recommended to seek professional assistance from a data recovery service that specializes in NAS devices. They have the expertise and tools required to recover data from infected devices.

      Remember to regularly backup your data to prevent data loss in the future.

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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 advantages of using the QNAP TVS-471U as a VPN server?

    There are several advantages of using the QNAP TVS-471U as a VPN server:

    1. Enhanced Security: The QNAP TVS-471U offers robust security features, including built-in VPN protocols such as PPTP, L2TP/IPSec, and OpenVPN. These protocols ensure secure and encrypted communication between the VPN server and client devices, protecting sensitive data from unauthorized access.
    2. Remote Access: With the TVS-471U acting as a VPN server, users can securely access their network resources from anywhere in the world. This is particularly useful for remote workers or individuals who need to access their files and applications on the go.
    3. Privacy and Anonymity: By using the QNAP TVS-471U as a VPN server, users can browse the internet anonymously, as their online activities are encrypted and routed through the VPN server. This helps protect their privacy and prevents ISPs or other entities from tracking their online behavior.
    4. Multiple Device Support: The TVS-471U VPN server supports a wide range of client devices, including Windows, macOS, iOS, and Android. This allows users to connect to the VPN server using their preferred device, ensuring seamless access to network resources.
    5. Easy Configuration and Management: The QNAP NAS operating system (QTS) provides a user-friendly interface for configuring and managing the VPN server settings. Users can easily set up and customize the VPN server according to their specific requirements, including authentication methods, encryption protocols, and client access permissions.
    6. Cost-Effective Solution: Using the QNAP TVS-471U as a VPN server eliminates the need for additional hardware or software solutions, saving costs for businesses or individuals looking to implement a VPN infrastructure.

    Overall, the QNAP TVS-471U offers a reliable and secure VPN server solution with easy setup and management, allowing users to enjoy the benefits of remote access, privacy, and enhanced security.

  • How does the QNAP TVS-471U handle VPN connections and ensure secure data transmission?

    The QNAP TVS-471U is a network-attached storage (NAS) device that supports VPN connections to ensure secure data transmission. It utilizes various protocols and features to establish and maintain secure VPN connections:

    1. VPN Server: The TVS-471U has a built-in VPN server that allows users to connect to the NAS remotely over the internet. It supports multiple VPN protocols such as PPTP, L2TP/IPSec, and OpenVPN.
    2. Encryption: The NAS supports encryption for VPN connections to ensure data confidentiality. It uses various encryption algorithms like AES-256 for secure data transmission.
    3. Authentication: The TVS-471U supports different authentication methods for VPN connections. Users can authenticate using username/password credentials or digital certificates, adding an extra layer of security.
    4. Firewall and Access Control: The NAS has a built-in firewall that can be configured to allow or block specific VPN traffic. It also supports access control lists (ACLs) to define which users or IP addresses are allowed to establish VPN connections.
    5. VPN Client Support: The TVS-471U can also act as a VPN client, allowing the NAS to establish secure connections to other VPN servers. This feature is useful when the NAS needs to access remote networks securely.
    6. VPN Connection Logs: The NAS keeps logs of VPN connections, including login attempts, connection duration, and IP addresses. These logs can be useful for monitoring and auditing purposes.

    Overall, the QNAP TVS-471U ensures secure data transmission over VPN connections by supporting various encryption algorithms, authentication methods, and firewall settings. It enables users to securely access and transfer data to and from the NAS remotely.

  • Can the QNAP TVS-471U support multiple VPN protocols, and what are the options available for configuring VPN clients?

    Yes, the QNAP TVS-471U supports multiple VPN protocols. The available options for configuring VPN clients on the QNAP TVS-471U include:

    1. OpenVPN: The QNAP NAS supports OpenVPN, which is a widely used and secure VPN protocol. OpenVPN is known for its strong encryption and flexibility.
    2. PPTP: The Point-to-Point Tunneling Protocol (PPTP) is another VPN protocol supported by the QNAP NAS. PPTP is relatively easy to set up and offers good compatibility with various devices.
    3. L2TP/IPSec: The Layer 2 Tunneling Protocol (L2TP) combined with the IP Security (IPSec) protocol is also supported. L2TP/IPSec provides a secure VPN connection and is commonly used for remote access.
    4. QNAP VPN Client: The QNAP NAS also has its own VPN client application that simplifies the setup and management of VPN connections. This client supports multiple VPN protocols and allows you to connect to various VPN servers.

    By supporting these different VPN protocols, the QNAP TVS-471U offers flexibility and compatibility with a wide range of VPN services and devices.

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