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

See “About volume snapshots” on page 199.
■ Use a separate empty volume that you have prepared in advance.
See “Creating a volume for use as a full-sized instant snapshot” on page 150.
When creating space-optimized instant snapshots that share a cache, you must
set up the cache before creating the snapshots.
See “Creating a shared cache object” on page 151.
If a space-optimized instant snapshot uses a dedicate cache, this can also be set
up when the snapshot is created. No additional preparation is required in this
case.
Note: The off-host processing solutions in this book require full-sized snapshots.
Preparing a volume for instant snapshot operations
To prepare a volume for instant snapshot operations, a version 20 Data Change
Object (DCO) and DCO volume must first be associated with that volume.
143Setting up volumes for instant snapshots
Preparing a volume for instant snapshot operations