VERITAS Volume Manager 3.1 Administrator's Guide

Cluster Functionality

Dynamic Multipathing (DMP)

Chapter 7312

You can also obtain all paths connected to a particular controller, for

example c2, using the following command:

# vxdmpadm getsubpaths ctlr=c2

To get the node that controls a path to a disk array, use the following

command:

# vxdmpadm getdmpnode nodename=c3t2d1

Assigning a User Friendly Name

You can assign a new name to a disk array using the following command:

# vxdmpadm setattr enclosure nike0 name=VMGRP_1

Assigning a logical name to the enclosure helps to easily identify the

enclosure. The above command assigns the name VMGRP_1 to the

enclosure nike0.

Display DMP Nodes

The vxdmpadm getdmpnode command displays the DMP node that

controls a particular physical path. The physical path can be speciﬁed as

the nodename attribute to this command. The node name must be a valid

path listed in the /dev/rdsk directory.

The following command displays the DMP nodes to the enclosure nike0:

# vxdmpadm getdmpnode enclosure=nike0

Display Subpaths

The vxdmpadm getsubpaths command displays the paths controlled by

the speciﬁc DMP node. The dmpnodename speciﬁed must be a valid node

in the /dev/vx/rdmp directory. The vxdmpadm getsubpaths command

also obtains all paths through a particular host disk controller.

For example, the following command lists all paths controlled by the

DMP node c2t1d0:

# vxdmpadm getsubpaths dmpnodename=c2t1d0

The following command obtains all paths through a the host disk

controller c2:

# vxdmpadm getsubpaths ctlr=c2