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From: "Sean Hamilton" <sh@bel.bc.ca>
To: <hackers@freebsd.org>
Date: Tue, 8 Apr 2003 22:51:32 -0700
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Subject: Undeletable ATA RAID
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Greetings,

I recently added two disks to a FreeBSD system and created an ATA array with
them. Upon rebooting, the existing array (formerly ar0) became ar1, and the
new array was now ar0. Accordingly, the system didn't boot. I have since
removed the second disk from the new array, and now the array ar0 (the new
array) is undeletable. It complains the second disk doesn't exist. When I
attempt to delete it, it simply returns upon reboot, and the system is again
unbootable. It even survived a zeroing of the first disk!

This is on 5.0-RELEASE.

sh