Professional Best Practices for Data Recovery from a Failed NAS Promise Pegasus2 R6 RAID Setup

Has your NAS Promise Pegasus2 R6 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?

Professional Best Practices for Data Recovery from a Failed NAS Promise Pegasus2 R6 RAID Setup

Promise Pegasus2 R6 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 Pegasus2 R6. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Professional Best Practices for Data Recovery from a Failed NAS Promise Pegasus2 R6 RAID Setup

RAID Recovery™ 2.8
Recover data from damaged RAID arrays inaccessible from a computer.
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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 Promise 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.

Are there any known third-party application vulnerabilities that can result in data loss on NAS Promise Pegasus2 R6 devices?

There have been no publicly disclosed third-party application vulnerabilities specifically targeting the NAS Promise Pegasus2 R6 devices that result in data loss. However, it's important to note that vulnerabilities can emerge at any time, so it's crucial to regularly update the firmware and software on your devices to ensure they are protected against any potential vulnerabilities. Additionally, following best practices such as using strong passwords, implementing network security measures, and regularly backing up your data can help mitigate the risk of data loss.

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

Although the NAS Pegasus2 R6 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:

  1. 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.

  2. 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.

  3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

  4. 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.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

Hetman Raid Recovery

This program restores data from damaged RAID arrays and is fully compatible with Promise Pegasus2 R6. 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.

Go to view
How to recover data from a Promise

How to recover data from a Promise

Pegasus2 R6 has 6 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 1E;
  • RAID 3;
  • RAID 5;
  • RAID 6;
  • 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:

  1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

  2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

  3. 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.

    Hetman RAID Recovery: Image Creation Wizard
  4. 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.

    Hetman RAID Recovery: Choose a disk or save the image via FTP

Where Are the User’s Files Actually Stored?

The Promise Pegasus2 R6 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

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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 Pegasus2 R6, feel free to leave a comment!
  • Emmett Jones
    Emmett Jones 7.09.2023 04:40 #
    Is it possible to recover data from a NAS Promise Pegasus2 R6 device that has undergone a file system conversion or re-partitioning?
    • Hetman Software
      Hetman Software 7.09.2023 05:59 #

      It is possible to recover data from a NAS Promise Pegasus2 R6 device that has undergone a file system conversion or re-partitioning, but it can be a complex and challenging process. Here are a few steps you can take:

      1. Stop using the device: As soon as you realize that data has been lost or corrupted, stop using the NAS device to prevent further damage or overwriting of data.
      2. Consult a professional data recovery service: It is recommended to seek the help of a professional data recovery service that specializes in NAS devices. They have the expertise and specialized tools to handle complex data recovery scenarios.
      3. Provide detailed information: When contacting the data recovery service, provide them with all the relevant information about the NAS device, including the model, configuration, details of the file system conversion or re-partitioning, and any other relevant information that might help in the recovery process.
      4. Avoid DIY recovery attempts: Attempting to recover data yourself without proper knowledge and tools can further complicate the recovery process and may lead to permanent data loss. It is best to leave it to the professionals.

      Remember, the success of data recovery depends on various factors such as the extent of damage, the actions taken after data loss, and the expertise of the data recovery service.

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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 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.

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Questions and answers

  • What are the different file access levels available on the NAS Promise Pegasus2 R6?

    The NAS Promise Pegasus2 R6 offers the following file access levels:

    1. Public Access: This level allows anyone on the network to access and read/write files stored on the NAS without any restrictions.
    2. User-Level Access: With user-level access, you can create individual user accounts and assign specific permissions to each user. This ensures that only authorized users can access and modify files.
    3. Group-Level Access: Group-level access allows you to create user groups and assign permissions to these groups. This simplifies the management of multiple users by granting permissions to groups instead of individual users.
    4. Administrator-Level Access: The administrator has full control over the NAS and can manage all aspects of the system, including user accounts, permissions, and system settings.

    These access levels provide flexibility in controlling who can access and modify files on the NAS, ensuring data security and privacy.

  • How can the file access levels be configured and managed on the NAS Promise Pegasus2 R6?

    The file access levels on the NAS Promise Pegasus2 R6 can be configured and managed through the following steps:

    1. Connect to the NAS: Access the Promise Pegasus2 R6 NAS device through a web browser by entering its IP address.
    2. Login to the NAS: Enter the administrator username and password to log in to the NAS management interface.
    3. Create User Accounts: Under the User Management section, create user accounts for individuals or groups who will be accessing the NAS. Assign a unique username and password to each user or group.
    4. Assign Access Rights: Once the user accounts are created, go to the File Sharing section and select the shared folder or volume for which you want to configure access levels. Choose the appropriate user or group and assign the desired access rights, such as read-only, read-write, or no access.
    5. Configure Advanced Permissions: For more granular control, you can configure advanced permissions on specific files or folders. This can be done by selecting the file or folder, going to the Properties or Permissions section, and specifying the access rights for individual users or groups.
    6. Enable or Disable Guest Access: If you want to allow guest access to certain shared folders, you can enable the guest account and assign appropriate access rights to it. This allows users to access the shared folders without requiring individual user accounts.
    7. Set up Access Control Lists (ACLs): ACLs allow for more fine-grained control over file access by specifying permissions for specific users or groups. You can configure ACLs on the Pegasus2 R6 NAS by going to the Access Control section and adding rules for each user or group.
    8. Regularly Review and Update Access Levels: It is essential to periodically review and update the access levels to ensure that only authorized users have the necessary permissions. Remove any unnecessary user accounts or adjust access rights as required.

    Note: The exact steps and terminology may vary slightly depending on the firmware version of the Promise Pegasus2 R6 NAS device. It is recommended to refer to the device's user manual or contact Promise Technology support for specific instructions.

  • What are the security implications and considerations when setting up file access levels on the NAS Promise Pegasus2 R6?

    When setting up file access levels on the NAS Promise Pegasus2 R6, there are several security implications and considerations to keep in mind:

    1. User Authentication: Ensure that strong passwords are set for user accounts accessing the NAS. Consider implementing two-factor authentication for an added layer of security.
    2. User Permissions: Assign appropriate access levels to users based on their roles and responsibilities. Limit access to sensitive files and directories to authorized individuals only.
    3. Group Permissions: Create groups and assign users to these groups based on their access requirements. This allows for easier management of permissions and ensures consistency across multiple users.
    4. Access Controls: Use access control lists (ACLs) to define granular permissions for individual files and folders. This allows for more fine-grained control over who can read, write, or modify specific files.
    5. Encryption: Enable encryption on the NAS to protect data at rest. This ensures that even if the physical device is compromised, the data remains secure.
    6. Regular Updates: Keep the NAS firmware and software up to date to address any security vulnerabilities or bugs that may exist in older versions.
    7. Network Segmentation: Consider placing the NAS on a separate network segment or VLAN to isolate it from other devices and reduce the attack surface.
    8. Firewall and Intrusion Detection: Implement a firewall to control incoming and outgoing network traffic to the NAS. Additionally, consider using intrusion detection and prevention systems to monitor and block any suspicious activity.
    9. Backup and Disaster Recovery: Regularly backup the data stored on the NAS to a separate location. This ensures that in the event of a security breach or data loss, the data can be restored.
    10. Physical Security: Protect the physical access to the NAS by placing it in a secure location, such as a locked server room. Additionally, consider using surveillance cameras or access control systems to monitor and restrict physical access.

    By considering these security implications and implementing appropriate measures, you can enhance the security of the file access levels on the NAS Promise Pegasus2 R6.