VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Administering DMP Using vxdmpadm

102 VERITAS Volume Manager Administrator’s Guide

Enabling a Controller

Enabling a controller allows a previously disabled host disk controller to accept I/O. This

operation succeeds only if the controller is accessible to the host and I/O can be

performed on it. When connecting active/passive disk arrays in a non-clustered

environment, the enable operation results in failback of I/O to the primary path. The

enable operation can also be used to allow I/O to the controllers on a system board that

was previously detached.

To enable a controller, use the following command:

# vxdmpadm enable ctlr=ctlr

Listing Information About Enclosures

To display the attributes of a speciﬁed enclosure, use the following command:

# vxdmpadm listenclosure enc0

The following command lists attributes for all enclosures in a system:

# vxdmpadm listenclosure all

Renaming an Enclosure

The vxdmpadm setattr command can be used to assign a meaningful name to an

existing enclosure, for example:

# vxdmpadm setattr enclosure enc0 name=GRP1

This example changes the name of an enclosure from enc0 to GRP1.

Note The maximum length of the enclosure name preﬁx is 25 characters. The name must

not contain an underbar character (_).

Starting the DMP Restore Daemon

The DMP restore daemon re-examines the condition of paths at a speciﬁed interval. The

type of analysis it performs on the paths depends on the speciﬁed checking policy.

Note The DMP restore daemon does not change the disabled state of the path through a

controller that you have disabled using vxdmpadm disable.