Upgrade to 9.0 - Mount to root failed..

[Warren Block]

On Sun, 8 Apr 2012, Airoso?icz fb. wrote:

> It's starting to make sense now.. Mounting ufs:/dev/ad*a*2s1a i.o. from
> ufs:/dev/ad2s1a simply doesn't work because as I've put in my original
> post with # ls -l /dev/ad* it doesn't exist.. Only ad2,ad2s1 & ad2s1a do..

ada device numbering is relative, so the first drive found is always 
ada0.  If there are no ada devices in /dev at all, I'd guess too much 
has been removed from the custom kernel.

> # man 8 tunefs: The tunefs can not be run on an active filesystem.
> To change an active filesystem it must be downgraded to read only or
> to unmounted.. [Which I've done with # mount -r -f..]
>
> # tunefs: /dev/ad2s1a: failed to write superblock..
>
> I've updated the /etc/fstab with the ROOT label but I can't get the
> single-user mount nor the tunefs to work..

http://www.wonkity.com/~wblock/docs/html/labels.html shows a full 
example.