Two sets of storage arrays reside within a cluster: local disks and multihost disks.
Local disks are directly connected to a single node and hold the Oracle Solaris Operating System and other nonshared data.
Multihost disks are connected to more than one node and hold client application data and other files that need to be accessed from multiple nodes.
For more conceptual information on multihost disks and local disks, see the Concepts for Oracle Solaris Cluster 4.4.