Current does not boot - BIOS problem?

Niki Denev nike_d at
Tue Jun 19 17:35:27 UTC 2007

Hash: SHA1

Marinos Ilias wrote:
> Hello list,
> Yesterday I upgraded to latest -CURRENT.Although the build and installing was successful, the system refuses to boot.It stops at the boot sequence with the following error:
> 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 @0x5195c from /home/ncvs/src/sys/boot/i386/loader/../../common/module.c:957
> --> Press a key on the console to reboot <--
> I cannot figure out what kind of problem is it.It's weird that the system cannot find which disk to boot from.I didn't have such problems at past and I run CURRENT at this desktop for over a year.Also I want to add that I cannot either boot the kernel.old , as it hangs when I try :
> kernel /boot/kernel.old/kernel
> at boot prompt.
> If you have any ideas, you're welcome!
> Thank you.
> Ilias Marinos
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I have exactly the same problem with recent -current sources with my
ThinkPad X31. I had to tell the loader to boot /boot/loader.old
and then i copied loader.old to loader and since then i have no
problems, but i do this after each rebuild. So, it's clearly something
wrong with the loader, but i wansn't able to find something suspicious
looking at recent commit logs

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