How to recover data from Uniview VS-R5220-B2T 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 Uniview VS-R5220-B2T

Uniview VS-R5220-B2T NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from VS-R5220-B2T.

How to recover data from NAS Uniview VS-R5220-B2T

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 Uniview also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Can remote access to NAS Uniview VS-R5220-B2T devices pose additional data loss risks?

Remote access to NAS (Network Attached Storage) devices, including the Uniview VS-R5220-B2T, can potentially pose additional data loss risks if not properly secured or configured. Here are some factors to consider:

  1. Weak authentication: If remote access to the NAS device is protected by weak or easily guessable passwords, it increases the risk of unauthorized access. Attackers could potentially delete or modify data, leading to data loss.
  2. Vulnerabilities: NAS devices, like any other technology, may have security vulnerabilities that can be exploited by attackers. If the device is not regularly updated with security patches, it may be susceptible to attacks that could result in data loss.
  3. Misconfiguration: Improperly configuring remote access settings on the NAS device can open up security loopholes. For example, leaving unnecessary ports open or not using encryption can make it easier for attackers to gain access and manipulate or delete data.
  4. Malware or ransomware attacks: If a remote user's device used to access the NAS is infected with malware or ransomware, there is a risk that the malicious software could spread to the NAS device and cause data loss. This emphasizes the importance of ensuring remote devices are adequately protected.

To mitigate these risks and ensure the security of remote access to NAS devices, it is recommended to follow best practices:

  • Implement strong authentication mechanisms, such as multi-factor authentication (MFA), to prevent unauthorized access.
  • Regularly update the NAS device's firmware and software to patch any security vulnerabilities.
  • Configure the NAS device's firewall to only allow necessary ports for remote access and use secure protocols like SSH or VPN.
  • Ensure that the remote devices accessing the NAS are protected with up-to-date antivirus and anti-malware software.
  • Regularly back up the data stored on the NAS to a separate location to minimize the impact of potential data loss.

By following these precautions, the additional data loss risks associated with remote access to NAS devices can be significantly reduced.

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

Although NAS VS-R5220-B2T 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 Uniview VS-R5220-B2T. 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 Uniview

How to recover data from a Uniview

VS-R5220-B2T has 12 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • RAID 50;
  • RAID 60;
  • JBOD;

NAS supports:

  • exFAT, VFAT, FAT 12 / 16 / 32;
  • NTFS / ReFS;
  • APFS / HFS+;
  • Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
  • VMFS / HikvisionFS;

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 Uniview VS-R5220-B2T network-attached storage keeps OS Linux 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 VS-R5220-B2T, feel free to leave a comment!
  • Lewis Punter
    Lewis Punter 9.09.2023 16:46 #
    How to make backup for NAS Uniview VS-R5220-B2T?
    • Hetman Software
      Hetman Software 9.09.2023 17:00 #

      To make a backup for the NAS Uniview VS-R5220-B2T, you can follow these steps:

      1. Connect to the NAS: Use a computer or device connected to the same network as the NAS. Open a web browser and enter the IP address of the NAS in the address bar. Press Enter to access the NAS management interface.
      2. Login to the NAS: Enter the username and password for the NAS. If you haven't changed them, the default username is "admin" and the default password is "123456".
      3. Navigate to the Backup settings: Once logged in, find the "Backup" or "Storage" section in the NAS management interface. The exact location may vary depending on the NAS firmware version or interface design.
      4. Select Backup Source: Choose the data or files you want to backup from the NAS. You can select specific folders, files, or the entire NAS storage.
      5. Choose Backup Destination: Select the backup destination, which can be an external hard drive, another NAS, or a cloud storage service. Make sure the destination has enough storage capacity to accommodate the backup.
      6. Configure Backup Settings: Set up the backup schedule, frequency, and any other specific settings you require. You can choose to run the backup manually or automatically at specified intervals.
      7. Start the Backup: Once all the settings are configured, click on the "Start Backup" or "Backup Now" button to initiate the backup process. The time required will depend on the size of the data being backed up.
      8. Verify the Backup: After the backup is complete, check the destination to ensure that the backup files are successfully created and are accessible.

      It is recommended to periodically check and update the backup settings to ensure your data is consistently backed up and protected.

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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 different file access levels available on the NAS Uniview VS-R5220-B2T?

    The NAS Uniview VS-R5220-B2T supports different file access levels, including:

    1. Administrator: This is the highest access level and allows full control over the NAS system. Administrators can manage users, groups, shared folders, and other system settings.
    2. User: Users have read and write access to their own files and folders. They can create, modify, and delete files within their assigned folders. However, they do not have access to system settings or other users' files.
    3. Group: Group access levels can be assigned to multiple users. It allows users within the same group to access shared folders and collaborate on files. The group access level can be customized based on specific permissions and restrictions.
    4. Guest: This access level is for temporary or limited access. Guests can access specific shared folders or files with restricted permissions. They usually have read-only access and cannot modify or delete files.
    5. Public: Public access allows unrestricted access to specific shared folders or files. Anyone with network access can read, modify, or delete files within the public folders.

    These access levels provide different levels of control and security, allowing administrators to manage and restrict access to files and folders on the NAS Uniview VS-R5220-B2T.

  • How can I configure file access levels on the NAS Uniview VS-R5220-B2T to ensure proper security and permissions?

    To configure file access levels on the NAS Uniview VS-R5220-B2T, follow these steps:

    1. Access the NAS interface: Open a web browser and enter the IP address of the NAS in the address bar. Login with your admin credentials.
    2. Create user accounts: Go to the "Control Panel" or "Users" section and create user accounts for each person who needs access to the files. Assign a unique username and password for each user.
    3. Set user permissions: Once the user accounts are created, go to the "Shared Folders" or "File Sharing" section. Select the folder you want to configure access levels for and click on "Edit" or "Permissions".
    4. Configure folder permissions: In the permissions settings, you can specify read, write, and execute permissions for each user or group. Assign appropriate permissions based on the level of access required for each user.
    5. Create user groups (optional): If you have multiple users with similar access requirements, create user groups. Assign permissions to these groups instead of individual users to simplify management.
    6. Enable access control lists (ACLs): If the NAS supports ACLs, enable this feature. ACLs allow for more granular control over file access permissions, including setting permissions for specific files or subfolders within a shared folder.
    7. Enable encryption and secure protocols: To ensure data security during transmission, enable encryption protocols such as SSL/TLS. Also, enforce the use of secure file transfer protocols like SFTP or FTPS.
    8. Regularly review and update permissions: Periodically review the access levels and permissions assigned to users and groups. Remove unnecessary permissions, revoke access for former employees, and adjust permissions as needed.
    9. Enable audit logs: Enable logging and auditing features on the NAS to track file access and changes. This helps in monitoring and identifying any unauthorized access attempts or suspicious activities.
    10. Regularly backup data: Implement a regular backup strategy to ensure data availability and recovery in case of accidental deletion, hardware failure, or security breaches.

    By following these steps, you can configure file access levels on the NAS Uniview VS-R5220-B2T to ensure proper security and permissions.

  • Can you explain the differences between read-only access, read-write access, and administrator access on the NAS Uniview VS-R5220-B2T?

    Read-only access, read-write access, and administrator access are different levels of permissions granted to users on the NAS Uniview VS-R5220-B2T. Here's an explanation of each:

    1. Read-only access: Users with read-only access have the ability to view and access files and folders stored on the NAS. They can open, read, and copy files, but they cannot make any changes or modifications to them. This level of access is suitable for users who only need to retrieve information without altering any data.
    2. Read-write access: Users with read-write access have the same privileges as read-only users, but with the additional capability to modify files and folders. They can create, edit, delete, and rename files, as well as move them between folders. This level of access is typically given to users who need to actively work with the stored data, such as making changes to documents or uploading new files.
    3. Administrator access: Administrator access provides the highest level of control and permissions on the NAS. Administrators have full control over all aspects of the NAS, including managing user accounts, setting up shared folders, configuring system settings, and assigning access permissions to other users. They can perform tasks like creating user accounts, granting or revoking access privileges, and managing the overall operation of the NAS.

    It's important to carefully assign access levels to users based on their roles and responsibilities to ensure data security and prevent unauthorized modifications or deletions.

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