Sun Cluster Concepts Guide for Solaris OS

Using the scdpm Command to Monitor Disk Paths

The scdpm(1M) command provides DPM administration commands that enable you to perform the following tasks:

Issue the scdpm(1M) command with the disk-path argument from any active node to perform DPM administration tasks on the cluster. The disk-path argument is always constituted of a node name and a disk name. The node name is not required and defaults to all if no node name is specified. The following table describes naming conventions for the disk path.

Note –

Use of the global disk-path name is strongly recommended, because the global disk-path name is consistent throughout the cluster. The UNIX disk-path name is not consistent throughout the cluster. The UNIX disk path for one disk can differ from cluster node to cluster node. The disk path could be c1t0d0 on one node and c2t0d0 on another node. If you use UNIX disk-path names, use the scdidadm -L command to map the UNIX disk-path name to the global disk-path name before issuing DPM commands. See the scdidadm(1M) man page.

Table 3–3 Sample Disk-Path Names

Name Type 

Sample Disk-Path Name 


Global disk path  


Disk path d1 on the schost-1 node


Disk path d1 on all nodes in the cluster


UNIX disk path  


Disk path c0t0d0s0 on the schost-1 node


All disk paths on the schost-1 node


All disk paths 


All disk paths on all nodes of the cluster