Specify the percentage of space that should be reserved to store Snapshot copies.
The Snapshot reserve specifies a set percentage of volume space for Snapshot copies. By default, the Snapshot reserve is 20%. The Snapshot reserve can be used only by Snapshot copies, not by the active file system. This means that if the active file system runs out of disk space, any space still remaining in the Snapshot reserve is not available for active file system use.
Note: Although the active file system cannot consume disk space reserved for Snapshot copies, Snapshot copies can exceed the Snapshot reserve and consume disk space normally available to the active file system. There is no way to prevent Snapshot copies from consuming disk space greater than the amount reserved for them; therefore, it is important to reserve enough disk space for Snapshot copies so that the active file system always has space available to create new files or modify existing ones.
For more information about the Snapshot reserve, see the Data ONTAP Data Protection Online Backup and Recovery Guide.