Hello,
I've noticed that, after unsuccessfully installing a machine via FAI, I was unable to undo the RAID configuration without resorting to extreme measures. Eg. popping in a regular Debian or Ubuntu CD, it was impossible to get rid of the pre-created RAID. Instead, the installer tried to force a RAID0, which I never configured (I only configure RAID1s), to be created. The only measure I could find to eliminate this bogus RAID configuration, was to format all disks with BSD. Simply running dd if=/dev/zero of=/dev/sd[ab], under Linux, didn't yield the desired effect. What gives? TIA! Kind regards, --Toni++