GEOM mirror newly added HDD booting problem

[Vladimir Konrad]

>   The problem: I wanted to test new configuration - has rebooted the
>   system and turned off 1st HDD (ad0):
> 
>   I wasn't able to boot having following error on boot stage 3:
> 
>   can't load 'kernel'.

did you install a boot record on the new hard-disc? the boot record
lives before the partitions/slices so it would not be automatically
mirrored...

vlad