System unbootable after upgrade to FBSD 7

Gerrit Kühn gerrit at
Tue Nov 13 01:08:26 PST 2007


I just upgraded my first system from 6-stable to 7. installkernel and
installworld went well. However, the system won't boot anymore. :-(
The bootloader still appears, grabs kernel and modules, followed by

Can't work out which disk we are booting from.
Guessed BIOS device 0xffffffff not found by probes, defaulting to disk0:

panic: free: guard1 fail @ 0x6c23c
from /usr/src/sys/boot/i386/loader/../../common/module.c:959

press any key to reboot

Maybe I did something stupid during the update, though I cannot imagine
what it might have been. Any hints how to get my system back online?


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