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Date:      Tue, 21 Oct 2003 11:54:36 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        Dimitry Andric <dimitry@andric.com>
Cc:        FreeBSD-Current List <freebsd-current@freebsd.org>
Subject:   Re: MBR zapped when panicking?
Message-ID:  <20031021185435.GA66921@rot13.obsecurity.org>
In-Reply-To: <13041066290.20031021201724@andric.com>
References:  <13041066290.20031021201724@andric.com>

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On Tue, Oct 21, 2003 at 08:17:24PM +0200, Dimitry Andric wrote:
> Hi,
>=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.

This is a known bug in the ATA driver.  Tor Egge provided a workaround
patch here a few weeks ago.  I didn't try it because I can't afford to
trash my disks like that again.

Kris

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