From owner-freebsd-stable@FreeBSD.ORG  Tue Nov 22 22:41:24 2005
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Date: Tue, 22 Nov 2005 14:41:14 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: dlm-fb@weaselfish.com
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Cc: freebsd-stable@freebsd.org
Subject: Re: 5.4-RELEASE: integer divide panic (trap 18) during install boot
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On Mon, 21 Nov 2005 dlm-fb@weaselfish.com wrote:

>
> Hi.  I've got a system that's dying during the scsi probe of the
> initial install boot.  The console messages are along the lines of:
>
> 	[...usual boot stuff...]
> 	vga0 <Generic ISA VGA>
> 	unknown: <PNP0303> can't assign resources (port)
> 	unknown: <PNP0c02> can't assign resources (port)
> 	unknown: <PNP0501> can't assign resources (port)
> 	unknown: <PNP0501> can't assign resources (port)
> 	unknown: <PNP0400> can't assign resources (port)
> 	unknown: <PNP0700> can't assign resources (port)
> 	Timecounter [...]
> 	Timecounters [...]
> 	Waiting 15 seconds for SCSI
> 	md0 preloaded image </mfsroot> 4423680 bytes at 0xc0a34270
> 	da0 at bt0 bus 0 target 0 lun 0
> 	da0: <SEAGATE ST39173LW 6246> Fixed Direct Access SCSI-2 device
> 	fatal trap 18: integer divide fault while in kernel mode

Random guess: the disk is broken and is reporting its size as 0 bytes and
CAM divides that value by 1024*1024 to get megabytes.

Try removing or replacing the disk.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org