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Reverse RAID of a RAID


This technique can be used to re-construct data on individual RAID drives when data on physical drives is corrupted, but can be recovered using RAID redundancy.

Suppose you have a RAID 5 with one missing drive and you need to reconstruct data on that drive. You can do that by creating a reverse RAID for it and then copy data from that missing drive to a real one, or to an image.

Note: Many controllers write their own metadata to drives to recognize that the drives belong to certains RAIDs. Without that metadata they won't see those RAIDs. You have to write that metadata manually.

To create a reverse RAID of a RAID with a missing drive,

1 Create a virtual RAID 5 of the existing drives or their images

Add a missing drive to the Parents tab.

If necessary, read the Basic RAID 4 and RAID 5 Operations and Volumes Sets and RAIDs help pages for details.

2 Right-click the Virtual Block Raid in the Drives panel and select Create Reverse RAID on the shortcut menu.
> The Reverse parents will appear in the Drives panel

These parents may be processed as real objects, they can be imaged, viewed/‚Äčedited. For your case the missing drive can be copied to a drive in the Drive Copy Wizard .

Note: The reverse parents contain the data that should be on the RAID parents, according to its layout, while RAID parents contain actual data, that may be corrupted.