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Date: Tue, 10 Jun 2008 16:56:07 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: DA Forsyth <iwrtech@iwr.ru.ac.za>
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Cc: freebsd-questions@freebsd.org
Subject: Re: xRAID disks....
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>
> The pair of ex-RAID disks are ad1 and ad2 and obviously are no longer
> a raid pair, yet 'something' is telling the ar() driver to try and
> pair them and failing because there is no raid hardware in that box.

there are no "raid hardware" on most devices. it's just marketing hype. 
actually there is not much need to have it for RAID-0/1/10 where there is 
almostnothing to process.

> purposes and has not shown any signs of knowing it was in a raid
> pair)
>
> I suspect the raidinfo is stored on the disk somewhere and a suitable
> 'dd' command can erase it.  but where and how?
erase the whole drive.

and next time don't use "hardware" RAID anymore. use gmirror and gstripe 
to have PORTABLE RAID.