Can a zones root directory be on a ZFS file system?
Solaris 10 release: Placing a zone’s root directory (i.e. it’s PATHNAME) on ZFS is supported starting with Solaris 10 10/08, and you can then upgrade with Live Upgrade going forward. There are still issues with placing a zone on ZFS on a release prior to Solaris 10 10/08 and then trying to upgrade. Solaris Express Release: You can place the zonepath of a non-global zone on ZFS.