VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Plexes

Dissociating and Removing Plexes

Chapter 6 223

• to reduce the number of mirrors in a volume so you can increase the

length of another mirror and its associated volume. When the plexes

and subdisks are removed, the resulting space can be added to other

volumes

• to remove a temporary mirror that was created to back up a volume

and is no longer needed

• to change the layout of a plex

CAUTION To save the data on a plex to be removed, the conﬁguration of that

plex must be known. Parameters from that conﬁguration (stripe unit

size and subdisk ordering) are critical to the creation of a new plex to

contain the same data. Before a plex is removed, you must record its

conﬁguration. See “Displaying Plex Information” on page 212” for

more information.

To dissociate a plex from the associated volume and remove it as an

object from VxVM, use the following command:

# vxplex -o rm dis plex

For example, to dissociate and remove a plex named vol01-02, use the

following command:

# vxplex -o rm dis vol01-02

This command removes the plex vol01-02 and all associated subdisks.

Alternatively, you can ﬁrst dissociate the plex and subdisks, and then

remove them with the following commands:

# vxplex dis plex

# vxedit -r rm plex

When used together, these commands produce the same result as the

vxplex -o rm dis command. The -r option to vxedit rm recursively

removes all objects from the speciﬁed object downward. In this way, a

plex and its associated subdisks can be removed by a single vxedit

command.