Kernel Trap during installworld caused unrecoverable system

[Glen Barber]

On Fri, Dec 26, 2008 at 12:34 PM, Kris Kennaway <kris at freebsd.org> wrote:
> Glen Barber wrote:
>>
>> Hi folks.
>>
>> I was unfortunate enough to encounter a kernel trap in single user
>> mode yesterday when upgrading from 7.1-RC1 to -RC2 using the typical
>> build/install world.
>>
>> I'm still not sure what caused the trap, as the system was rebooting
>> when I saw the screen.  As one would expect, this led to an
>> irrecoverable system; the system would automatically drop me into
>> single user mode, as it could only mount the root directory; /bin/sh
>> and /bin/csh would not work (had to use /restore/csh for the minimal
>> digging I actually could do).
>>
>> So, now to the question.  Given I could not mount anything other than
>> /, would there have been any way for me to gather debugging
>> information on what caused this failure?  (FWIW, I am certain it is
>> not a hardware failure.)
>
> You can proceed recovering the system using the tools in /rescue, and once
> you have shared libraries working again, run savecore to save the crashdump
> (assuming one was made).
>

Hi, Kris.

I'll do some digging later today.  I appreciate your response.

-- 
Glen Barber