Set mountpoint to legacy
# zfs set mountpoint=legacy z2data/data
# zonecfg -z zone2
zonecfg:zone2> add fs
zonecfg:zone2:fs> set type=zfs
zonecfg:zone2:fs> set special=z2data/data
zonecfg:zone2:fs> set dir=/data
zonecfg:zone2:fs> end
zonecfg:zone2> verify
zonecfg:zone2> commit
zonecfg:zone2> exit
# zoneadm -z zone2 reboot