Date: Fri, 26 Dec 2008 17:34:38 +0000 From: Kris Kennaway <kris@FreeBSD.org> To: Glen Barber <glen.j.barber@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Kernel Trap during installworld caused unrecoverable system Message-ID: <495515AE.4050606@FreeBSD.org> In-Reply-To: <4ad871310812260918h538d82c7s2f72f254bf08c26c@mail.gmail.com> References: <4ad871310812260918h538d82c7s2f72f254bf08c26c@mail.gmail.com>
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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). Kris
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