Создание зеракала gmirror с разбивкой gpart

echo 'geom_mirror_load=YES' >> /boot/loader.conf

gmirror label -v -b round-robin gm0 /dev/ad0

gmirror insert gm0 /dev/ad1

gpart backup ada0 > /tmp/gpart.txt
gpart restore mirror/gm0 < /tmp/gpart.txt

gpart bootcode -b /boot/pmbr mirror/gm0
gpart bootcode -p /boot/gptboot -i 1 mirror/gm0

newfs -U /dev/mirror/gm0p2