How to recover data from QNAP TVS-682T 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-682T

QNAP TVS-682T 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-682T.

How to recover data from NAS QNAP TVS-682T

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-682T device's caching policy impact data loss risks?

The caching policy of a NAS (Network Attached Storage) device like the QNAP TVS-682T can impact data loss risks in a few ways:

  1. Write caching: NAS devices often use write caching to improve performance by temporarily storing data in a fast cache before writing it to the hard drives. However, if there is a power outage or system failure before the data is written from the cache to the drives, there is a risk of data loss. To mitigate this risk, many NAS devices, including the QNAP TVS-682T, provide options to enable write cache flushing or use battery backup units (BBUs) to protect the cached data during power failures.
  2. Read caching: NAS devices also utilize read caching to improve read performance by storing frequently accessed data in a cache for faster retrieval. However, if the cached data becomes corrupted or lost, there is a risk of data loss. It is important to regularly monitor the health of the cache and ensure proper backup and redundancy measures are in place to minimize the impact of cache failures.
  3. RAID configuration: The TVS-682T supports various RAID configurations to enhance data protection and availability. The choice of RAID level (e.g., RAID 1, RAID 5, RAID 6) can impact data loss risks. For example, RAID 1 provides mirroring, where data is duplicated across multiple drives, offering improved fault tolerance. On the other hand, RAID 5 and RAID 6 provide parity-based protection, allowing for data recovery in case of drive failures. However, if multiple drives fail or encounter errors during rebuilds, there is a higher risk of data loss.
  4. Backup and redundancy: Regardless of the caching policy, it is crucial to have proper backup and redundancy strategies in place to mitigate data loss risks. Regularly backing up important data to external storage devices, cloud services, or remote NAS devices can protect against various failure scenarios, including cache failures or multiple drive failures.

Overall, understanding the caching policy of a NAS device like the QNAP TVS-682T and implementing appropriate backup and redundancy measures are essential to minimize data loss risks and ensure data integrity and availability.

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

Although NAS TVS-682T 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-682T. 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-682T 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-682T 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-682T, feel free to leave a comment!
  • Denzil Hadfield
    Denzil Hadfield 17.09.2023 07:42 #
    What are the costs associated with data recovery from a NAS QNAP TVS-682T device?
    • Hetman Software
      Hetman Software 17.09.2023 08:59 #

      The costs associated with data recovery from a NAS QNAP TVS-682T device can vary depending on several factors, including the severity of the data loss and the specific data recovery service provider. Here are some potential costs to consider:

      1. Evaluation Fee: Many data recovery service providers charge an evaluation fee to assess the extent of the data loss and provide a quote for the recovery process. This fee can range from $100 to $300 or more.
      2. Recovery Service Fee: The actual data recovery process typically incurs a service fee, which can vary based on the complexity of the recovery and the amount of data to be recovered. This fee can range from a few hundred dollars to several thousand dollars.
      3. Parts and Replacement Costs: In some cases, data recovery may require replacement parts or components for the NAS device. These additional costs can include hard drives, controller cards, or other hardware components.
      4. Expedited Service Fee: If you require urgent or expedited data recovery, some service providers may charge an additional fee for prioritizing your case.
      5. Shipping and Handling: If you need to send your NAS device to a data recovery service provider, you may need to cover the shipping and handling costs, including packaging and insurance.

      It is important to note that these costs are estimates and can vary significantly depending on the specific circumstances of the data loss and the data recovery service provider. It is recommended to contact multiple service providers, provide them with detailed information about your situation, and request a quote to get a more accurate understanding of the potential costs involved.

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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 key features and measures implemented in the QNAP TVS-682T NAS to ensure data security?

    The QNAP TVS-682T NAS incorporates several key features and measures to ensure data security. Some of these include:

    1. AES 256-bit Encryption: The NAS supports AES 256-bit encryption, which ensures that all data stored on the device is encrypted and protected from unauthorized access.
    2. RAID Protection: The TVS-682T supports various RAID configurations, including RAID 0, 1, 5, 6, and 10. RAID provides redundancy and data protection by distributing data across multiple hard drives, ensuring that even if one drive fails, the data can still be accessed and recovered.
    3. Snapshot Protection: The NAS supports snapshot technology, allowing users to take snapshots of their data at different points in time. This feature enables quick recovery of files or folders in case of accidental deletion or data corruption.
    4. Antivirus Protection: The TVS-682T is equipped with an antivirus engine that can scan files and folders for malware and viruses. It provides real-time protection against potential threats, ensuring that the data stored on the NAS remains secure.
    5. Network Security: The NAS supports various network security protocols, including SSL/TLS encryption for secure data transfer over the network. It also offers features like IP blocking, access control, and two-factor authentication to prevent unauthorized access to the device.
    6. Data Backup and Sync: The TVS-682T allows users to backup their data to external storage devices, cloud storage services, or remote NAS devices. It also supports real-time data synchronization between multiple NAS devices, ensuring data redundancy and protection.
    7. File-level Security: The NAS provides granular file-level security features, allowing administrators to set access permissions and restrictions for individual files and folders. This ensures that only authorized users can access and modify specific data.
    8. Data Recovery: In the event of data loss or accidental deletion, the NAS offers various data recovery options. It supports file recovery from Recycle Bin, snapshot restoration, and even data recovery from external backup devices.

    Overall, the QNAP TVS-682T NAS provides a comprehensive set of features and measures to ensure data security, protecting the stored data from various threats and ensuring its availability and integrity.

  • Can you explain the encryption options available on the QNAP TVS-682T NAS and how they protect the stored data?

    The QNAP TVS-682T NAS provides several encryption options to protect stored data:

    1. Folder Encryption: This option allows you to encrypt specific folders on the NAS. When enabled, the data within those folders is encrypted using AES 256-bit encryption. This ensures that even if someone gains unauthorized access to the NAS, they won't be able to access the encrypted data without the encryption key.
    2. Volume-based Encryption: This feature allows you to encrypt entire volumes on the NAS. When enabled, all data stored within the volume is encrypted using AES 256-bit encryption. Volume-based encryption provides a higher level of security as it encrypts all the data on the volume, including system files and applications.
    3. Shared Folder Encryption: This option allows you to encrypt shared folders on the NAS. Similar to folder encryption, the data within these shared folders is encrypted using AES 256-bit encryption. Shared folder encryption ensures that data remains secure even when accessed by multiple users over the network.
    4. Network-based Encryption: The TVS-682T NAS supports various network protocols, such as SMB/CIFS, AFP, and FTP, which can be encrypted using SSL/TLS protocols. This ensures that data transmitted over the network is encrypted, protecting it from interception and unauthorized access.

    These encryption options protect stored data by encrypting it using strong encryption algorithms. AES 256-bit encryption is widely considered secure and is used by governments and organizations worldwide. The encryption keys are securely stored on the NAS, and access to the encrypted data requires the correct encryption key. This prevents unauthorized access to the data, even if the physical NAS is stolen or accessed without proper authentication. Overall, these encryption options provide robust security measures to safeguard the stored data on the QNAP TVS-682T NAS.

  • How does the QNAP TVS-682T NAS handle user access control and authentication to prevent unauthorized access to sensitive data?

    The QNAP TVS-682T NAS provides various user access control and authentication mechanisms to prevent unauthorized access to sensitive data. Here are some of the features it offers:

    1. User Accounts: The NAS allows administrators to create multiple user accounts with different levels of access privileges. Each user account can be assigned specific folders or files that they can access.
    2. User Groups: Users can be organized into groups to simplify access control management. Group permissions can be set for shared folders, ensuring that all members of a group have the same access rights.
    3. Access Control Lists (ACL): The NAS supports ACL, which enables fine-grained control over file and folder permissions. Administrators can set read, write, and execute permissions for individual users or groups.
    4. Windows Active Directory (AD) Integration: The NAS can integrate with an existing Windows AD domain, allowing administrators to manage user accounts and access permissions centrally. This simplifies user management and ensures consistency with existing authentication systems.
    5. LDAP Support: The NAS supports Lightweight Directory Access Protocol (LDAP), enabling integration with LDAP servers for user authentication. This is useful in environments where LDAP is the preferred authentication method.
    6. Two-Factor Authentication (2FA): To enhance security, the NAS supports 2FA, requiring users to provide an additional authentication factor, such as a verification code from a mobile app, in addition to their password.
    7. IP Access Control: Administrators can restrict access to the NAS based on IP addresses or ranges. This allows only authorized devices or networks to connect to the NAS.
    8. HTTPS and SSL/TLS Encryption: The NAS supports HTTPS for secure web access and SSL/TLS encryption for data transmission. This ensures that data is encrypted and secured during communication.

    Overall, the QNAP TVS-682T NAS employs a combination of user account management, access control lists, integration with existing authentication systems, and encryption to prevent unauthorized access and protect sensitive data.

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