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Recovering ASR Disks

Created by dave. Last edited by dave, 6 years and 300 days ago. Viewed 2,371 times. #2
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Problem

I have some disks that used to be attached to a quasi-raid (for example: a I2O RAID Controller) that I now want to use as regular disks.

The CentOS installer sees it as a "BIOS Raid" disk, and offers to use it as /dev/mapper/asr_ something, even though there is no raid hardware or configuration.

Solution

There is a metainfo sector on the disk which has a flag that tells the OS that there's a quasi-raid going on. To get rid of this information:

# dmraid -r /dev/sda -E
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