How to recover data from QNAP TVS-671 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-671

QNAP TVS-671 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-671.

How to recover data from NAS QNAP TVS-671

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 a NAS QNAP TVS-671 device's caching policy impact data loss risks?

The caching policy of a NAS (Network Attached Storage) device like QNAP TVS-671 can impact data loss risks in the following ways:

  1. Write caching: NAS devices often use write caching to improve performance by temporarily storing data in a cache before writing it to the actual storage medium. However, if a power outage or system failure occurs before the data is written to the disk, there is a risk of data loss. To mitigate this risk, NAS devices usually have mechanisms like battery backup units (BBUs) or uninterruptible power supplies (UPS) to ensure that cached data is safely written to the disks during such events.
  2. Read caching: Read caching involves storing frequently accessed data in a cache to speed up subsequent read operations. While read caching does not directly impact data loss risks, it can potentially lead to data inconsistency issues. If the NAS device experiences a failure or corruption in the underlying storage while relying heavily on read caching, there is a chance that the cached data may not accurately reflect the actual data on the disks. This can result in data loss or data integrity problems if the cached data is used as the primary source.
  3. RAID configurations: NAS devices often support various RAID (Redundant Array of Independent Disks) configurations to provide data redundancy and protection against disk failures. The choice of RAID configuration impacts the data loss risks associated with the device. For example, RAID 0 offers high performance but no data redundancy, increasing the risk of data loss if a single disk fails. On the other hand, RAID 1 or RAID 5 configurations provide varying levels of data redundancy, reducing the risk of data loss in case of disk failures.

It is essential to carefully configure and monitor the caching policy and RAID settings of a NAS device to balance performance and data protection. Additionally, regular backups and implementing appropriate disaster recovery strategies can further mitigate data loss risks.

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

Although NAS TVS-671 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-671. 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-671 has 6 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-671 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-671, feel free to leave a comment!
  • Newt Ellis
    Newt Ellis 17.09.2023 10:46 #
    Can data recovery from a NAS QNAP TVS-671 device be performed if there are issues with the network connectivity?
    • Hetman Software
      Hetman Software 17.09.2023 11:00 #

      Yes, data recovery from a QNAP TVS-671 NAS device can still be performed even if there are issues with network connectivity. The network connectivity issues may prevent accessing the NAS device over the network, but it is still possible to recover the data by directly connecting the storage drives to a computer.

      QNAP NAS devices typically use RAID configurations to store data redundantly across multiple drives. In case of network connectivity issues, you can remove the drives from the QNAP TVS-671 NAS and connect them to a computer using a SATA to USB adapter or by directly installing them in the computer if compatible. Once connected, you can use data recovery software to scan and recover the data from the drives.

      It's important to note that if the drives were configured in a RAID array, the recovery process may require additional steps or specialized software to reconstruct the RAID and recover the data. If you are not familiar with the process, it is recommended to seek assistance from a professional data recovery service to ensure the best chances of successful recovery.

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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 steps involved in streaming audio files to a QNAP TVS-671 NAS device?

    To stream audio files to a QNAP TVS-671 NAS device, you can follow these steps:

    1. Connect the QNAP TVS-671 NAS device to your network and ensure it is powered on.
    2. Access the QNAP NAS management interface by entering the device's IP address into a web browser.
    3. Login to the management interface using your administrator credentials.
    4. Set up a shared folder on the QNAP NAS where you will store your audio files. This can be done under the "Control Panel" > "Shared Folders" section. Create a new shared folder and configure the appropriate permissions.
    5. Upload your audio files to the shared folder either through the web interface or by using a file transfer protocol (FTP) client.
    6. Install a media server application on your QNAP NAS device. QNAP provides a built-in media server called "Media Streaming Add-on" or you can use third-party applications like Plex or Twonky.
    7. Configure the media server application by specifying the shared folder where your audio files are stored. You may need to scan the folder to index the audio files.
    8. On your playback device (smart TV, computer, mobile device, etc.), install a media player application that can connect to the QNAP NAS and stream audio files. Some popular media players include VLC, Kodi, or the media player app provided by the NAS manufacturer.
    9. Launch the media player application and search for available media servers on your network. The QNAP NAS should be detected as a media server.
    10. Access the QNAP NAS media server from the media player application and navigate to the shared folder where your audio files are stored.
    11. Browse through the folders and select the audio file you want to stream. The media player should start playing the audio file over your network.

    Note: The specific steps may vary depending on the model and firmware version of your QNAP NAS device, as well as the media server and media player applications you choose to use. It is recommended to refer to the user manuals and documentation provided by QNAP and the respective applications for detailed instructions.

  • What are the supported audio file formats for streaming to a QNAP TVS-671 NAS?

    The QNAP TVS-671 NAS supports a wide range of audio file formats for streaming. Some of the supported audio file formats include:

    1. MP3
    2. AAC
    3. FLAC
    4. WAV
    5. OGG
    6. WMA
    7. AIFF
    8. ALAC (Apple Lossless)
    9. DSD (Direct Stream Digital)
    10. APE (Monkey's Audio)

    These are just a few examples, and the TVS-671 NAS may support additional audio file formats as well. It is always recommended to check the official QNAP documentation or consult the product specifications for the most up-to-date and comprehensive list of supported audio file formats.

  • Are there any specific software or applications required to stream audio files to a QNAP TVS-671 NAS?

    To stream audio files to a QNAP TVS-671 NAS, you can use various software and applications depending on your specific requirements. Here are a few options:

    1. QNAP's own apps: QNAP provides several apps that can be used to stream audio files to your NAS, such as Music Station, Qmusic, and Qfile.
    2. DLNA/UPnP media server: The QNAP TVS-671 NAS has a built-in DLNA/UPnP media server that allows you to stream audio files to compatible devices. You can use media player apps like VLC, Windows Media Player, or Plex to access and play the files.
    3. Plex Media Server: Plex is a popular media server software that can be installed on your QNAP NAS. It organizes and streams your media files, including audio, to various devices. You can use the Plex app on your devices to access and play the files.
    4. Twonky Media Server: Twonky is another media server software that can be installed on your QNAP NAS. It supports streaming audio files to compatible devices on your network. You can use media player apps that support DLNA or UPnP to access and play the files.

    These are just a few examples, and there may be other software or applications available depending on your specific needs and preferences. It's recommended to check the QNAP App Center or explore third-party media server options compatible with QNAP NAS devices.

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