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: