About Disksets

This section provides overview information on disksets and their relationship to logical hosts, and procedures on how to add and remove disks from the diskset associated with the logical host.

Sun Cluster logical hosts are mastered by physical hosts. Only the physical host that currently masters a logical host can access the logical host's diskset. When a physical host masters a logical host's diskset, it is said to have ownership of the diskset. In general, Sun Cluster takes care of diskset ownership. However, if the logical host is in maintenance state, as reported by the hastat(1M) command, you can use the DiskSuite metaset -t command to manually take diskset ownership. Before returning the logical host to service, release diskset ownership with the metaset -r command.

If the logical hosts are up and running, you should never perform diskset administration using either the -t (take ownership) or -r (release ownership) options of the metaset(1M) command. These options are used internally by the Sun Cluster software and must be coordinated between the cluster nodes.