Unmapping a host group from a volume removes the mapping between the volume and the host group (including all host group members). The volume is moved to an unmapped state. If this mapping was the last mapping to the host group and there are no other volume mappings to the hosts in the host group, this host group and all its members become part of the default storage domain.
To unmap a host group from a volume:
The Array Summary page is displayed.
The Volume Summary page for that array is displayed.
The Host Group Summary page is displayed.
The Host Group Details page is displayed.
The Host Group Details - Mapped Volumes and Snapshots Summary page is displayed.