gmirror problems

[Robin Breathe]

Pawel Jakub Dawidek wrote:
> Unfortunately, gmirror and other GEOM classes are not supported by our
> installer.
> 
> The safest way to do what you want is to:
> 
> 	# gmirror label <name> ad1
> 	create slices and partitions on /dev/mirror/<name>
> 	create file system
> 	copy data from ad0 to <name>
> 	change /etc/fstab to boot from /dev/mirror/<name>s1a or something
> 	reboot
> 	# gmirror insert <name> ad0

Are any nasty side-effects likely from slicing and newfs-ing ad1 prior 
to labelling the mirror? For example, could the gmirror metadata get 
overwritten at some later stage by writing to the end of the last slice?

Robin