Bug#630107: [kfreebsd] cannot configure grub-pc (error: cannot find a GRUB drive for /dev/ad0s1)

[Robert Millan <rmh@debian.org>]

2011/6/11 Jonathan Nieder <jrnieder@gmail.com>:
>>>  /usr/sbin/grub-probe: error: cannot find a GRUB drive for /dev/ad0s1.  Check your device.map
>>>  ls: cannot access /lib/modules/8.2-1-amd64/unknown.ko: No such file or directory
>>
>> What filesystem(s) are you using?
>
> Only one slice, UFS.

Did you check your device.map?  Try regenerating it (grub-mkdevicemap).

Also please check wether grub 1.98+20100804-14 (from squeeze) also suffers
from this problem.

-- 
Robert Millan