This feature is new in the Solaris 9 9/04 release.
Solaris Volume Manager for Sun Cluster introduces volume management features that work specifically with Sun Cluster and with applications such as Oracle9i Real Application Clusters. Solaris Volume Manager for Sun Cluster enables you to create and manage storage that is grouped into multi-owner disk sets. A multi-owner disk set enables multiple nodes to share ownership of a disk set. Multi-owner disk sets provide scalability because an instance of the application runs on each node in the cluster. Since each instance of the application directly accesses the shared storage, multi-owner disk sets also enhance the performance of the application.