VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Plexes

Copying Plexes

Chapter 6222

• If the new plex is smaller or more sparse than the original plex, an

incomplete copy is made of the data on the original plex. If an

incomplete copy is desired, use the -o force option to vxplex.

• If the new plex is longer or less sparse than the original plex, the

data that exists on the original plex is copied onto the new plex. Any

area that is not on the original plex, but is represented on the new

plex, is ﬁlled from other complete plexes associated with the same

volume.

• If the new plex is longer than the volume itself, then the remaining

area of the new plex above the size of the volume is not initialized

and remains unused.

Copying Plexes

This task copies the contents of a volume onto a speciﬁed plex. The

volume to be copied must not be enabled. The plex cannot be associated

with any other volume. To copy a plex, use the following command:

# vxplex cp volume new_plex

After the copy task is complete, new_plex is not associated with the

speciﬁed volume volume. The plex contains a complete copy of the

volume data. The plex that is being copied should be the same size or

larger than the volume. If the plex being copied is larger than the

volume, an incomplete copy of the data results. For the same reason,

new_plex should not be sparse.

Dissociating and Removing Plexes

When a plex is no longer needed, you can dissociate it from its volume

and remove it as an object from VxVM. You might want to remove a plex

for the following reasons:

• to provide free disk space