Gmirror/replace disk

gmirror insert -v gm0 /dev/ad12 gmirror: Not all disks connected.

gmirror remove -v gm0 /dev/ad12 gmirror: Not all disks connected. Try 'forget' command first.

gmirror forget gm0

gmirror insert -v gm0 /dev/ad12 Done.

gmirror rebuild -v gm0 /dev/ad12 Done.