How to recover data from QNAP TVS-473 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-473

QNAP TVS-473 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-473.

How to recover data from NAS QNAP TVS-473

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 compatibility issues that can result in data loss for NAS QNAP TVS-473 devices?

Yes, there can be compatibility issues that can result in data loss for NAS QNAP TVS-473 devices. Some potential causes include:

  1. Incompatible hard drives: If you use incompatible hard drives with your QNAP TVS-473, it can lead to data loss. It is recommended to use hard drives that are listed on the QNAP compatibility list to ensure compatibility and reduce the risk of data loss.
  2. Firmware or software compatibility: Using outdated firmware or incompatible software versions can also result in compatibility issues and potential data loss. It is important to keep the firmware and software up to date to avoid such issues.
  3. RAID configuration issues: If the RAID configuration is not properly set up or if there are issues with the RAID array, it can lead to data loss. It is crucial to follow the recommended RAID configuration guidelines and regularly check the health of the RAID array to prevent data loss.
  4. Power supply problems: Inadequate power supply or power surges can cause compatibility issues and potentially damage the NAS device, leading to data loss. It is recommended to use a stable power source and consider using a UPS (Uninterruptible Power Supply) to protect against power-related issues.
  5. Network connectivity issues: Problems with the network connection, such as unstable or slow connections, can result in data loss during file transfers or when accessing data from the NAS. It is important to ensure a stable and reliable network connection to minimize the risk of data loss.

To minimize the chances of compatibility issues and data loss, it is advisable to follow the manufacturer's guidelines, keep the device and software up to date, use compatible hardware components, and regularly backup important data.

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

Although NAS TVS-473 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-473. 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-473 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-473 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-473, feel free to leave a comment!
  • Fletcher Clutterbuck
    Fletcher Clutterbuck 18.09.2023 00:42 #
    Are there any specific data structures used in NAS QNAP TVS-473 devices that may affect data recovery?
    • Hetman Software
      Hetman Software 18.09.2023 00:59 #

      The NAS QNAP TVS-473 device uses a Linux-based operating system and supports various data storage configurations such as RAID (Redundant Array of Independent Disks). The specific data structures used in these devices are typically related to the file system and the RAID configuration.

      QNAP NAS devices commonly use the ext4 file system, which is a widely-used Linux file system. It utilizes data structures like inodes, superblocks, and block allocation bitmaps to manage file metadata, file data, and disk space allocation.

      Regarding RAID configurations, the TVS-473 supports various RAID levels such as RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Each RAID level has its own specific data organization and redundancy mechanisms. For example, RAID 5 uses block-level striping with distributed parity, while RAID 1 mirrors data across multiple drives.

      When it comes to data recovery, the specific data structures used in the TVS-473 can affect the recovery process. In the case of file system corruption or accidental deletion, data recovery tools or services may need to understand the ext4 file system and its data structures to locate and recover the lost files.

      In the case of RAID configurations, data recovery becomes more complex. The specific RAID level and configuration used in the TVS-473 can impact the recovery process. RAID data recovery often requires specialized knowledge and tools to reconstruct the data from multiple drives and handle potential issues like failed drives or degraded arrays.

      It is important to note that data recovery from NAS devices can be a complex and delicate process. If you encounter data loss or data recovery needs, it is recommended to consult with professional data recovery services experienced in handling NAS devices and their specific data structures.

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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 basic features of the QNAP TVS-473 NAS?

    The QNAP TVS-473 NAS has several basic features, including:

    1. Processor: It is powered by an AMD R-Series RX-421ND quad-core 2.1GHz processor.
    2. Memory: It comes with 4GB DDR4 RAM, which can be expanded up to 64GB.
    3. Storage: It supports four 3.5-inch or 2.5-inch SATA hard drives or SSDs, providing a maximum capacity of up to 64TB. It also has two M.2 SATA 6Gb/s SSD slots for caching or tiering.
    4. Expansion Slots: It has two PCIe Gen 3 x4 slots, allowing for the installation of additional expansion cards such as 10GbE network cards, USB 3.1 Gen2 cards, or QM2 cards for adding M.2 SSDs.
    5. Connectivity: It offers two built-in Gigabit Ethernet ports and supports optional 10GbE network expansion cards for faster data transfer speeds. It also has four USB 3.0 ports, two USB 3.1 Gen2 ports, and two HDMI outputs.
    6. RAID Support: It supports various RAID configurations, including RAID 0, 1, 5, 6, 10, 50, 60, and JBOD, providing data protection and performance optimization options.
    7. Virtualization: It supports virtualization technologies such as Virtualization Station, which allows users to run multiple virtual machines on a single NAS.
    8. Surveillance: It includes Surveillance Station, a comprehensive surveillance solution that supports up to 40 IP cameras, providing real-time monitoring, recording, and playback.
    9. Multimedia: It supports multimedia applications like QNAP's HD Station and Plex Media Server, allowing users to enjoy multimedia content on their TV or mobile devices.
    10. Operating System: It runs on QNAP's QTS operating system, which provides a user-friendly interface and a wide range of applications for file management, backup, multimedia, and more.

    These are some of the basic features of the QNAP TVS-473 NAS, but it also offers many advanced features and functionalities that cater to different user needs.

  • How does the QNAP TVS-473 NAS enhance data storage and management?

    The QNAP TVS-473 NAS enhances data storage and management in several ways:

    1. High storage capacity: The TVS-473 NAS provides multiple drive bays, allowing users to install multiple hard drives or SSDs. This enables high storage capacity, accommodating a large amount of data.
    2. RAID support: The NAS supports various RAID configurations, such as RAID 0, 1, 5, 6, and 10. This offers data redundancy and protection against drive failures, ensuring data integrity and availability.
    3. File sharing and collaboration: The TVS-473 NAS allows easy file sharing and collaboration among users within a network. It supports various protocols like SMB/CIFS, NFS, and FTP, enabling seamless sharing of files across different platforms and devices.
    4. Data backup and synchronization: The NAS offers comprehensive backup solutions, including scheduled backups, real-time remote replication, and cloud backup services. It ensures data protection and minimizes the risk of data loss.
    5. Data management and organization: The NAS provides a user-friendly interface and powerful management tools, allowing users to efficiently organize and manage their data. It supports features like file indexing, content searching, and metadata tagging, making it easier to locate and retrieve files.
    6. Virtualization support: The TVS-473 NAS is compatible with virtualization technologies like VMware, Microsoft Hyper-V, and Citrix. It can be used as a storage solution for virtual machines, enhancing virtualization performance and efficiency.
    7. Expandability and scalability: The NAS offers expansion options, such as additional drive bays and expansion units, allowing users to scale up their storage capacity as their needs grow. This ensures long-term storage scalability without the need for a complete system upgrade.

    Overall, the QNAP TVS-473 NAS provides a robust and feature-rich solution for data storage and management, offering high capacity, data protection, collaboration, backup, organization, and scalability.

  • Can you explain the key functionalities and benefits of the QNAP TVS-473 NAS for home or small business users?

    The QNAP TVS-473 NAS is a versatile and powerful storage solution designed for both home and small business users. Here are some key functionalities and benefits of this NAS:

    1. Storage Capacity: The TVS-473 comes with four drive bays, allowing users to install up to four hard drives or SSDs. This provides ample storage capacity for storing and organizing large amounts of data, including documents, photos, videos, and other multimedia files.
    2. High Performance: The TVS-473 is equipped with a powerful AMD R-Series quad-core processor and up to 64GB of DDR4 RAM. This ensures smooth and efficient performance, enabling users to perform tasks such as file transfers, backups, and multimedia streaming without any lag or slowdown.
    3. RAID Support: The NAS supports various RAID configurations (RAID 0, 1, 5, 6, 10, and JBOD), allowing users to customize their storage setup according to their needs. RAID provides data redundancy and protection against drive failures, ensuring that your data remains safe and accessible even if one or more drives fail.
    4. File Sharing and Collaboration: The TVS-473 supports multiple file sharing protocols such as SMB/CIFS, NFS, and FTP. This enables seamless file sharing and collaboration among multiple users or devices within a home or small business network. Additionally, the NAS supports Windows AD and LDAP for easy integration into existing network environments.
    5. Virtualization Support: With Virtualization Station, the TVS-473 allows users to run multiple virtual machines (VMs) on a single NAS. This feature is particularly beneficial for small businesses that require running different operating systems or applications without the need for separate physical servers.
    6. Data Backup and Recovery: The NAS offers comprehensive backup solutions to protect your data. It supports scheduled or real-time backups to external drives, remote servers, or cloud storage services like Amazon S3, Microsoft Azure, and Google Cloud Storage. In case of accidental file deletion or system failure, the TVS-473 provides various recovery options to restore your data.
    7. Multimedia Streaming: The TVS-473 serves as a media hub, allowing users to stream multimedia content to various devices such as TVs, computers, tablets, and smartphones. It supports popular streaming protocols like DLNA, AirPlay, and Chromecast, making it easy to enjoy your favorite movies, music, and photos on different screens.
    8. App Ecosystem: QNAP NAS devices have a vast app ecosystem, including a wide range of applications for different purposes. Users can install apps for surveillance, multimedia management, productivity, communication, and more, enhancing the functionality and versatility of the TVS-473.

    Overall, the QNAP TVS-473 NAS offers a combination of high performance, storage capacity, data protection, and versatile features, making it an ideal choice for both home and small business users who require a reliable and efficient storage solution.

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