From LedHed's Wiki
ZPool Usage
zpool create <POOL_NAME> <RAID_LEVEL> <DEVICE> zpool create mypool raidz da{0,1,2}
zpool destroy <poolname> zpool destroy mypool
zpool add
zpool status -v <POOL_NAME>
zpool list
Remove a failed disk
zpool offline <POOL_NAME> /dev/gptid/00000000-0000-0000-0000-000000000000
Replace Offline disk with new
zpool replace <POOL_NAME> /dev/gptid/00000000-0000-0000-0000-000000000000 /dev/da#
Note:/dev/da# should be the new disk
ZFS Usage
zfs create -V <VOLUME_SIZE> <VOLUME_PATH> zfs create -V 200g /mypool/myvol
Reference
zpools man page - http://www.manpagez.com/man/8/zpool/