How to Access Files on a RAID Disk When NAS Uniview VX3024-V2 is Not Operational: Practical Steps

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Uniview VX3024-V2
• How to Remove Hard Disks from Your NAS and Connect Them to a PC
  • Step-by-Step Data Recovery with Hetman RAID Recovery
  • How to Safely Recover Data from Disk Images
  • Where Are the User’s Files Actually Stored?
  • RAID Recovery Software: Detailed Comparison

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.

Are there any recommended practices for regular testing and validation of data backups to prevent potential loss on NAS Uniview VX3024-V2 devices?

Yes, there are recommended practices for regular testing and validation of data backups to prevent potential loss on NAS Uniview VX3024-V2 devices. Here are some best practices:

1. Regular Backup Schedule: Establish a regular backup schedule to ensure that data is backed up at frequent intervals. This can be daily, weekly, or monthly, depending on the criticality of the data.
2. Automated Backup: Utilize automated backup solutions provided by the NAS device or use third-party backup software to schedule and automate the backup process. This ensures consistency and reduces the chances of human error.
3. Verify Backup Integrity: After each backup, verify the integrity of the backup files. Most NAS devices provide options to verify the backup data against the original files to ensure that the backup is complete and accurate.
4. Test Data Restoration: Periodically test the restoration process by restoring data from the backup. This will help identify any issues or errors in the backup files and ensure that the restoration process works smoothly when needed.
5. Offsite Backup: Maintain an offsite backup of critical data to protect against physical damage or loss of the NAS device. This can be done by replicating the data to another NAS device located in a different physical location or by using cloud storage services.
6. Monitor Backup Status: Regularly monitor the backup status and logs to ensure that backups are running successfully. This will help identify any issues or failures in the backup process and take necessary actions to resolve them.
7. Regularly Update Firmware: Keep the NAS device firmware up to date to ensure that it has the latest security patches and bug fixes. This helps in maintaining the stability and reliability of the backup process.

By following these recommended practices, you can minimize the risk of potential data loss on NAS Uniview VX3024-V2 devices and ensure the availability of backed-up data when needed.

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

Although the NAS VX3024-V2 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.

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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 VX3024-V2. 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

VX3024-V2 has 24 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:

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.

   

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.

   

Where Are the User’s Files Actually Stored?

The Uniview VX3024-V2 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