What the Snapshot copy reserve is

The Snapshot copy reserve sets a specific percent of the disk space for Snapshot copies. However, for a FlexVol volume, the Snapshot copy reserve is set to 5 percent by default. By default, the Snapshot copy reserve is 5 percent of the disk space. The active file system cannot consume the Snapshot copy reserve space, but the Snapshot copy reserve, if exhausted, can use space in the active file system.

Managing the Snapshot copy reserve involves the following tasks:

•	Ensuring that enough disk space is allocated for Snapshot copies so that they do not consume active file system space

•	Keeping disk space consumed by Snapshot copies below the Snapshot copy reserve

•	Ensuring that the Snapshot copy reserve is not so large that it wastes space that could be used by the active file system