Adding partitions to gmirror device

[Wojciech Puchar]

> 2X 250GB SATA drives that I've established a gmirror(8) over, following the 
> instructions in section 19.4 of the Handbook.
>
> Now, one of the machines, being transformed into a webserver, needs a 
> separate, newly created /var/www partition (its current partitions only take 
> up 27G of the total ~238G available).
>
> My dilemma is -- how do I add another partition without hosing the system?

normally

bsdlabel -e /dev/mirror/yourmirror

and add partition