VERITAS Volume Manager 4.1 Administrator's Guide

Administering Volumes

Backing up Volumes Online

Chapter 8 313

# vxplex [-g diskgroup] dcoplex=dcologplex convert \

state=SNAPDONE plex

dcologplex is the name of an existing DCO plex that is to be associated

with the new snapshot plex. You can use the vxprint command to ﬁnd out

the name of the DCO volume as described in “Adding a DCO and DCO

Volume” on page 277.

For example, to make a snapshot plex from the plex trivol-03 in the

3-plex volume trivol, you would use the following command:

# vxplex dcoplex=trivol_dcl-03 convert state=SNAPDONE

trivol-03

Here the DCO plex trivol_dco_03 is speciﬁed as the DCO plex for the new

snapshot plex.

To convert an existing plex into a snapshot plex in the SNAPDONE state

for a volume on which Non-Persistent FastResync is enabled, use the

following command:

# vxplex [-g diskgroup] convert state=SNAPDONE plex

A converted plex is in the SNAPDONE state, and can be used

immediately to create a snapshot volume.

NOTE The last complete regular plex in a volume, an incomplete regular plex,

or a dirty region logging (DRL) log plex cannot be converted into a

snapshot plex.

Backing Up Multiple Volumes Using Snapshots

To make it easier to create snapshots of several volumes at the same

time, the snapshot option accepts more than one volume name as its

argument, for example:

# vxassist [-g diskgroup] snapshot volume1 volume2 ...

By default, each replica volume is named SNAPnumber-volume, where

number is a unique serial number, and volume is the name of the volume

for which the snapshot is being taken. This default pattern can be

overridden by using the option -o name=pattern, as described on the

vxassist(1M) manual page. For example, the pattern SNAP%v-%d

reverses the order of the number and volume components in the name.