Kernel panic on boot (how to debug?)

[Benjamin Lutz]

On Sunday 08 October 2006 18:32, Stefan Bethke wrote:
> Am 21.09.2006 um 23:01 schrieb Benjamin Lutz:
> > By sheer luck I figured out how to get into DDB though :), so I can
> > now
> > provide a backtrace.
> >
> >   Fatal trap 18: integer divide fault while in kernel mode
>
> ...
>
> >   --- trap 0x12, rip = 0xffffffff801c02d5, rsp =
> > 0xffffffff80864a80, rbp =
> >     0xffffffff80864ad0 ---
> >   ata_raid_promise_read_meta() at ata_raid_promise_read_meta+0x95
> >   ata_raid_read_metadata() at ata_raid_read_metadata+0x2f4
>
> Reading through ata_raid_promise_read_meta(), it's not clear to me
> how that trap would get triggered, but you might want to boot verbose
> to see how far into ata_raid_promise_read_meta() it gets.  It seems
> to me that there is something on your disk that almost looks like a
> RAID metadata sector, and the driver getting confused by it.
>
> Also, try not compiling ataraid into the kernel to see if that avoids
> the trap.

Thanks for your answer. Unfortunately, the system in question suddenly died 10 
days ago and has been replaced, so I can't do any further observations.

Cheers
Benjamin
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