OT: broken raid configuration persists too hard

[Toni Mueller]

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++