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: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.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.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.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.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: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.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.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'.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.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.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.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.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.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.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: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.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.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.

Practical Steps for Accessing Files on a RAID Disk Without a Working NAS Uniview VS-R5220-B2T

Name: How to recover data from a Uniview
Uploaded: 2025-10-16T08:53:56+03:00
Description: How to recover data from a Uniview

Has your NAS Uniview VS-R5220-B2T suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

Practical Steps for Accessing Files on a RAID Disk Without a Working NAS Uniview VS-R5220-B2T

Data Recovery Tool

Uniview VS-R5220-B2T NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an VS-R5220-B2T. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Contents

Why Regular Data Recovery Tools Can’t Restore Files from RAID
Key Information About the NAS Uniview VS-R5220-B2T
How to Remove Hard Disks from Your NAS and Connect Them to a PC

RAID Recovery™ 2.8

Recover data from damaged RAID arrays inaccessible from a computer.

Download

Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Uniview often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

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:

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.
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.
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.
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 Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS VS-R5220-B2T can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

Power off the NAS and disconnect it from the power source.

WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.
Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.
Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

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How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with Uniview VS-R5220-B2T. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

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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;

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

Overwriting during the recovery process;
Additional data loss caused by bad sectors;
User errors.

To create a disk image, follow these steps:

Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.
Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

Where Are the User’s Files Actually 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.

RAID Recovery Software: Detailed Comparison

Product	Operating system	RAID controller support	Supported file systems	Virtual RAID controller support	Data recovery from damaged RAID	File preview
Hetman RAID Recovery	Windows, Linux, MacOS	Yes, over 100 controllers	FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS	Yes	Yes	Yes
DiskInternals RAID Recovery	Windows	Yes, over 10 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
R-Studio	Windows, Mac, Linux	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
UFS Explorer RAID Recovery	Windows, Mac, Linux	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
EaseUS Data Recovery	Windows	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
ReclaiMe Free RAID Recovery	Windows	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes

Feedback

We will be happy to answer your questions!

Comments (3)

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!

Reply
Lewis Punter 9.09.2023 16:46 #

How to make backup for NAS Uniview VS-R5220-B2T?

Reply
- Hetman Software 9.09.2023 17:00 #
  To make a backup for the NAS Uniview VS-R5220-B2T, you can follow these steps:
  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.
  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".
  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.
  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.
  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.
  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.
  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.
  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.
  Reply

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Updated:
16.10.2025 8:53

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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.

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 xaker.ru, 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.