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.

Steps

1. Become superuser on any node in the cluster.

2. Monitor a disk path by using the scdpm command.

   # scdpm -m node:disk path

   Refer to for naming conventions for the node:disk path argument.

3. Verify that the disk path is monitored.

   # scdpm -p node:all

Example 4–20 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 .

# scdpm -m schost-1:d1
# scdpm -p schost-1:d1
	     schost-1:/dev/did/dsk/d1   Ok

Example 4–21 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.

# scdpm -m all:/dev/did/dsk/d1
# scdpm -p schost-1:d1
	     schost-1:/dev/did/dsk/d1   Ok	    

Example 4–22 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.

# scdpm -m all:all 
# scdpm -p all:all
		 schost-1:/dev/did/dsk/d4   Ok
	     schost-1:/dev/did/dsk/d3   Ok
	     schost-2:/dev/did/dsk/d4   Fail
	     schost-2:/dev/did/dsk/d3   Ok
	     schost-2:/dev/did/dsk/d5   Unmonitored
	     schost-2:/dev/did/dsk/d6   Ok