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Date: Tue, 21 Oct 2003 20:50:44 +0200
From: Tilman Linneweh <tilman@arved.de>
To: Dimitry Andric <dimitry@andric.com>
Message-ID: <20031021185044.GA82524@huckfinn.arved.de>
References: <13041066290.20031021201724@andric.com>
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cc: current@FreeBSD.org
Subject: Re: MBR zapped when panicking?
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* Dimitry Andric [Di, 21 Okt 2003 at 20:19 GMT]:
>=20
> Today I had a -CURRENT machine panic on me with a page fault, and
> something happened that I have seen before: the machine refused to
> come up afterwards. Closer inspection revealed that the MBR on the
> boot disk was totally zapped, filled with seemingly random characters.
> Luckily the disk label was still intact, allowing me to recover the
> machine reasonably easy. The MBRs on the other disks (see attached
> dmesg.txt for more info) wasn't touched by the panic.

Same happened to me last week,
It is a known problem, see 3. point on=20
http://www.freebsd.org/releases/5.2R/todo.html

regards
tilman