How to Monitor a Disk Path

Perform this task to monitor disk paths in your cluster.

DPM is not supported on nodes that run versions that were released prior to Sun Cluster 3.1 10/03 software. Do not use DPM commands while a rolling upgrade is in progress. After all nodes are upgraded, the nodes must be online to use DPM commands.

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands.

1. Become superuser or assume a role that provides solaris.cluster.modify RBAC authorization on any node in the cluster.

2. Monitor a disk path.

   # cldevice monitor -n node disk

3. Verify that the disk path is monitored.

   # cldevice status device

Example 5–39 Monitoring a Disk Path on a Single Node

The following example monitors the schost-1:/dev/did/rdsk/d1 disk path from a single node. Only the DPM daemon on the node schost-1 monitors the path to the disk /dev/did/dsk/d1 .

# cldevice monitor -n schost-1 /dev/did/dsk/d1
# cldevice status d1

Device Instance   Node           Status
--------------- ---- ------
/dev/did/rdsk/d1   phys-schost-1 Ok

Example 5–40 Monitoring a Disk Path on All Nodes

The following example monitors the schost-1:/dev/did/dsk/d1 disk path from all nodes. DPM starts on all nodes for which /dev/did/dsk/d1 is a valid path.

# cldevice monitor /dev/did/dsk/d1
# cldevice status /dev/did/dsk/d1

Device Instance   Node           Status
--------------- ---- ------
/dev/did/rdsk/d1   phys-schost-1 Ok

Example 5–41 Rereading the Disk Configuration From the CCR

The following example forces the daemon to reread the disk configuration from the CCR and prints the monitored disk paths with status.

# cldevice monitor +
# cldevice status
Device Instance              Node               Status
---------------              ----               ------
/dev/did/rdsk/d1             schost-1           Ok
/dev/did/rdsk/d2             schost-1           Ok
/dev/did/rdsk/d3             schost-1           Ok
                              schost-2          Ok
/dev/did/rdsk/d4             schost-1           Ok
                              schost-2          Ok
/dev/did/rdsk/d5             schost-1           Ok
                              schost-2          Ok
/dev/did/rdsk/d6             schost-1           Ok
                              schost-2          Ok
/dev/did/rdsk/d7             schost-2           Ok
/dev/did/rdsk/d8             schost-2           Ok