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Volume configuration options for a SAN environment

You should decide how you want to allocate space for LUNs and Snapshot copies before you configure your volume or set up your LUNs. Do you want to allocate space ahead of time, or do you want to allocate space as you need the space?

You can pre-allocate space or add space as required for your LUNs and Snapshot copies in your volume. You must answer the following questions to determine the type of LUNs and Snapshot copies that work best in your environment:
How you answer these questions determines which of the three common usage scenarios for allocating space in your volume for your LUNs and Snapshot copies works best for your environment. The three common usage scenarios are as follows: