What do I need to know about increasing reserved capacity?

Typically, you should increase capacity when you receive a warning that the reserved capacity is in danger of becoming full. You can increase reserved capacity only in increments of 8 GiB.

For snapshot operations, reserved capacity is typically 40 percent of the base volume. For asynchronous mirroring operations reserved capacity is typically 20 percent of the base volume. Use a higher percentage if you believe the base volume will undergo many changes or if the estimated life expectancy of a storage object's copy service operation will be very long.