This is an old revision of the document!
Rename zpool
zpool export [pool_name] zpool import [original_pool_name] [new_pool_name]
Change mountpoint
zfs set mountpoint=/myspecialfolder mypool
Adding another drive to an existing single-drive zfs pool to form a mirror:
zpool attach nameofpool /dev/disk/by-id/currentdisk /dev/disk/by-id/newdisk