If the source and the target zonepaths reside on ZFS and both are in the same pool, a snapshot of the source zonepath is taken and the zoneadm clone uses ZFS to clone the zone.
You can specify to copy a ZFS zonepath instead of specifying to clone the ZFS. If neither the source nor the target zonepath is on ZFS, or if one is on ZFS and the other is not on ZFS, the clone process uses the existing copy technique.
In all cases, the system copies the data from a source zonepath to a target zonepath if using a ZFS clone is not possible.
For more information, see the following: