freebsd zfs gpt

remount rw
zfs set readonly=off poolname

assembly partitions
gpart show
gpart create -s GPT ada1
gpart add -b 34 -s 128 -t freebsd-boot ada1
gpart add -t freebsd-zfs ada1
gpart modify -i 2 -l disk500 ada1

gpart create -s GPT ada0
gpart add -b 40 -s 1024 -t freebsd-boot -l gptboot2 ada0
gpart add -s 2G -t freebsd-swap -l swap2 ada0
gpart add -t freebsd-zfs -l zfs2 ada0

gpart list
old: gptid/4800820b-7896-11e3-ad2b-20cf30c4dac7
new: gptid/fc53208e-7d58-11e3-af2d-20cf30c4dac7
zpool attach jasmine gptid/4800820b-7896-11e3-ad2b-20cf30c4dac7 gptid/fc53208e-7d58-11e3-af2d-20cf30c4dac7
gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0


zpool status
zpool attach zroot gpt/disk0 gpt/disk500

zfs list -t snapshot
zfs send xroot/jailw@20140114 > xroot-jailw-20140114
cat file | zfs recv pool/fsname

zfs snapshot -r zroot@20150101
version 1.1
for ada0

gpart destroy ada0
gpart create -s GPT ada0
gpart add -b 34 -s 1024 -t freebsd-boot ada0
gpart add -t freebsd-zfs ada0
gpart modify -i 2 -l drivelabel1 ada0