How to Recover Data from RAID Partition?

Summary: In this blog, we’ll discuss the ways with which you can fix corrupt and inaccessible RAID partition. We’ll also discuss RAID recovery methods to recover data from RAID 0, RAID 5, and RAID 6 partitions which are deleted, lost, or inaccessible.

RAID partitions are logical volumes of a RAID array. There are various situations when you lose data from RAID, such as deleted, lost, undetected, or corrupted RAID.

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These situations may arise due to human errors, malware infection, software-related problems, disk issues, and so on. For customer evaluation, you can download our RAID recovery software from the link below.

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[WARNING]: You can fix a RAID partition which has become inaccessible due to corruption by formatting it. But if you do that, you lose all the data stored on that partition. Hence, if the data is important, don’t format the inaccessible partition.

Methods to Recover Data from RAID Partition

If you’ve lost data due to accidental deletion of partition, this guide is worth reading. You can also follow this guide if the RAID partition is lost, undetected, or inaccessible.

[NOTE]: Before performing RAID recovery methods, check disk health and SMART status. If disk health is poor or you observe disk failure symptoms, back up the data from RAID volumes or partitions immediately
  1. Use Disk Management Utility to Restore RAID Partition

Sometimes the system fails to assign a drive letter to a RAID partition and the partition/volume becomes inaccessible. Open Disk Management utility to check if a drive letter is assigned to RAID partition. If not assigned, follow the steps given below to assign a drive letter:

  • In the Disk Management utility, right-click the RAID partition which doesn’t have a drive letter assigned to and select ‘Change Drive Letter and Path

[NOTE]: If you’re unable to see the RAID partition in Disk Management utility, it’s probably deleted.

  • Click ‘Add’ on the window that opens, and choose a drive letter from the drop-down
  • Click ‘OK’, and then click ‘OK’ again
  • Check if you’re able to access the RAID partition in File Explorer

If you’re able to access the volume now, back up the data immediately.

If you encounter an error such as File system can’t be recognized’ which prompts you to format the RAID partition, it means that the partition is probably corrupt due to file system issues. Follow the next method to fix a corrupt partition.

2. Run CHKDSK Command

CHKDSK is a command-line utility which fixes file system issues and other disk-related issues. Running this command on the affected RAID partition may fix its corruption, and help you restore data from corrupt RAID.

Follow the steps given below:

[WARNING]: Running CHKDSK command may result in data loss as it marks the non-readable sectors as bad sectors.

  • Launch Command Prompt as an Administrator
  • On Command Prompt window, type the below-given command, and hit Enter

chkdsk /f /r x:

Where x is the drive letter of a RAID partition

/f fixes errors

/r identifies the bad sectors and tries to read information from them

RAID partition recovery

  • Check if the file system issue is fixed and you’re able to access the partition

If CHKDSK fails to fix the corruption, follow the next method.

  1. Use a RAID Partition Recovery Tool

A RAID recovery tool such as Stellar Data Recovery Technician recovers data from a RAW/corrupt partition. Additionally, it also recovers data from deleted or missing, partitions which are not visible in the Disk Management utility.

[IMPORTANT]: Label all the physical disks in the RAID array before removing them from the rack and recovering data by using the partition recovery tool. This will help reassemble the disks (if needed) to their original position.

Follow the steps given below to recover data from corrupt, deleted or Missing RAID partition:

  • Disconnect the RAID disks, and then connect them to a Windows system as standalone (separate) disks by using SATA connectors or SATA to USB converter cable/enclosure
  • Install Stellar Data Recovery Technician software, and launch it. Download link share above/
  • Choose ‘All Data’, and click ‘Next
    software for RAID partition recovery
  • Select ‘RAID Recovery’, and click ‘Scan
    software for RAID partition recovery
  • Now Select RAID 0, RAID 5, or RAID 6 tab based on the RAID configuration you’ve been using
  • You can select RAID disks from ‘Select Hard Drives to Reconstruct RAID’ and move them to ‘Move hard drives up/down for disk order’ box by using the arrow buttons
  • Use the up-down arrow buttons to arrange RAID drives in the same sequence as they were in the RAID array
  • Under “Select RAID parameters” select the RAID parameters

[NOTE]: If you don’t know the parameters, you can choose ‘Don’t know …’ option or select a probable value

RAID partition

  • Click ‘Build RAID’ at the bottom-right corner

This will construct RAID in accordance with the provided RAID parameters. However, if you had chosen “Don’t know…” and had selected probable parameters, the software would automatically detect the RAID parameters and construct a few probable RAID constructions.

  • Select the constructed RAID, and click ‘Show Volume List
  • Under ‘Physical Disk’ choose the RAID drive, and click ‘Scan
  • Choose the RAID drive, and click ‘Search
  • If you still don’t find the missing or deleted partition, click ‘Click Here’ link at the bottom to run ‘Extensive Scan

By running an extensive scan on the RAID drive, you should be able to see all the partitions including missing, undetected, and deleted ones.

RAID partition

  • Choose the partition from which you want to recover data, and click ‘Scan
  • Once the scanning is complete, click ‘Click Here’ link at the bottom-left to start ‘Deep Scan’ of the partition

This will show you a list of all your files on the RAID partition. You can select a file to “preview” it before saving.

  • Choose the files you want to save, and click ‘Recover’. You’ll be prompted to browse the desired location to save the recovered RAID partition data.
    RAID partition
  • Connect a spare drive to the PC, click ‘Browse’, and choose spare drive as the save location
  • Click ‘Start Saving’ to save the recovered files.

Once you’ve restored the required data on a spare drive, you can reassemble the labelled RAID disks on the RAID server/rack, turn on RAID, and then format the corrupt partition to make it accessible and usable.

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Conclusion

A RAID partition may go missing/lost, or get corrupted due to bad sectors, drive errors, virus intrusion, etc. It may also get deleted due to human errors and accidental deletion. As a result of this, you lose precious data.

Though running CHKDSK command may fix the corrupted RAID  and help you restore RAID partition data, there is no way to recover data lost due to a missing or deleted partition other than using a RAID recovery software such as Stellar Data Recovery Technician. This software recovers data from lost, deleted, or corrupt RAID drive partition. It also helps in rebuilding a broken RAID 0, RAID 5, or RAID 6 array.

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