Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Creating a volume for use as a full-sized instant
snapshot
If you want to create a full-sized instant snapshot for an original volume that does
not contain any spare plexes, you can use an empty volume with the required
degree of redundancy, and with the same size and same region size as the original
volume.
To create an empty volume for use by a full-sized instant snapshot
1
Use the vxprint command on the original volume to find the required size
for the snapshot volume.
# LEN=‘vxprint [-g diskgroup] -F%len volume‘
Note: The command shown in this and subsequent steps assumes that you
are using a Bourne-type shell such as sh, ksh or bash. You may need to modify
the command for other shells such as csh or tcsh. These steps are valid only
for DCO version 20.
2
Use the vxprint command on the original volume to discover the name of
its DCO:
# DCONAME=‘vxprint [-g diskgroup] -F%dco_name volume‘
Setting up volumes for instant snapshots
Creating a volume for use as a full-sized instant snapshot
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