Sun Cluster software supports disk-path monitoring (DPM). DPM improves the overall reliability of failover and switchover by reporting the failure of a secondary disk-path. You can use one of two methods for monitoring disk paths. The first method is provided by the cldevice command. This command enables you to monitor, unmonitor, or display the status of disk paths in your cluster. See the cldevice(1CL) man page for more information about command-line options.
The second method for monitoring disk paths in your cluster is provided by the Sun Cluster Manager graphical user interface (GUI). Sun Cluster Manager provides a topological view of the monitored disk paths. The view is updated every 10 minutes to provide information about the number of failed pings.