gconcat question

[John Nielsen]

On Saturday 18 October 2008, Roger Olofsson wrote:
> What are the steps to bring back gconcatenated disks if doing an upgrade
> from FreeBSD6 to FreeBSD7 like this?
>
> As-is situation:
> FreeBSD 6.2-STABLE ad0 has FreeBSD ad1, ad2 and ad3 are gconcatenated
> using 'gconcat label -v data /dev/ad1 /dev/ad2 /dev/ad3'.

The concat device should just appear automatically after the upgrade as long 
as you (continue to) load the geom_concat kernel module. Be aware that if 
the on-disk metadata format has changed then it will automatically be 
upgraded. This is usually a good thing but if you need to roll back to 6.x 
for some reason it's something to take into consideration.

> Planned upgrade:
> Reboot from cdrom, install FreeBSD7 from cd to ad0

Just curious, is there a reason you're going this route instead of upgrading 
from source?

JN