How to Monitor a Disk Path
Perform this task to monitor disk paths in your cluster.
Caution - DPM is not supported on nodes that run versions that were released
prior to Sun Cluster 3.1 5/03 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.
Become superuser on any node in the cluster.
Monitor a disk path by using the scdpm(1M) command.
# scdpm -m node:disk path
Refer to Table 4-6 for naming conventions for the node:disk path argument.
Verify that the disk path is monitored.
# scdpm -p node:all
Example--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--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--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 |
How to Unmonitor a Disk Path
Use this procedure to unmonitor a disk path.
Caution - DPM is not supported on nodes that run versions that were released
prior to Sun Cluster 3.1 5/03 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.
Become superuser on any node in the cluster.
Determine the state of the disk path to unmonitor.
# scdpm -p [all:] disk path
-p Prints a detailed listing of the current status of a specified disk path
[:all] Displays all monitored and unmonitored disk paths
On each node, unmonitor the appropriate disk paths.
# scdpm -u node:disk path
Refer to Table 4-6 for naming conventions for the node:disk path argument.
Example--Unmonitoring a Disk Path
The following example unmonitors the schost-2:/dev/did/rdsk/d1 disk path and prints disk paths with status for the entire cluster.
# scdpm -u schost-2:/dev/did/rdsk/d1 # 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/d1 Unmonitored schost-2:/dev/did/dsk/d6 Ok |
How to Print Faulted Disk Paths
Use the following procedure to print the faulted disk paths for a cluster.
Caution - DPM is not supported on nodes that run versions that were released
prior to Sun Cluster 3.1 5/03 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.
Become superuser on any node in the cluster.
Print the faulted disk paths throughout the cluster.
# scdpm -p -F node:disk path
Refer to Table 4-6 for naming conventions for the node:disk path argument.
Example--Printing Faulted Disk Paths
The following example prints faulted disk paths for the entire cluster.
# scdpm -p -F [all:]all schost-1:/dev/did/dsk/d4 Fail schost-1:/dev/did/dsk/d3 Fail schost-2:/dev/did/dsk/d4 Fail schost-2:/dev/did/dsk/d3 Fail schost-2:/dev/did/dsk/d5 Fail schost-2:/dev/did/dsk/d6 Fail |
How to Monitor Disk Paths From a File
Use the following procedure to monitor or unmonitor disk paths from a file. The file must list the commands to monitor or unmonitor, the node names, and the disk-path names. Each field of the file should be separated by a column. Format each listing by following the example.
syntax in command file: [u,m] [node|all]:<[/dev/did/rdsk/]d- | [/dev/rdsk/]c-t-d- | all> command file entry u schost-1:/dev/did/rdsk/d5 m schost-2:all |
Caution - DPM is not supported on nodes that run versions that were released
prior to Sun Cluster 3.1 5/03 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.
Become superuser on any node in the cluster.
Monitor the disk paths from a file.
# scdpm -f filename
Verify the disk paths with status for the cluster.
# scdpm -p all:all
Example--Monitor or Unmonitor Disk Paths From a File
The following example monitors or unmonitors disk paths from a file.
# scdpm -f schost_config # 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 |