NetApp
7-mode/HA pair/V-Series : Volumes : Snapshot management : Configuring Snapshot copies : Setting the Snapshot copy reserve
Setting the Snapshot copy reserve
You can specify the percentage of a volume that is reserved for Snapshot copies. The default space reserved for Snapshot copies is 20 percent for NAS volumes, zero percent for SAN, and zero percent for VMware volumes.
Steps 
1.
From the Home tab, double-click the appropriate storage system to display a subtree of management features.
2.
Click Storage > Volumes.
3.
Select the volume for which you want to set the Snapshot copy reserve.
4.
From the Snapshot menu, click Configure.
5.
Type or select the percentage of the volume that you want reserved for Snapshot copies and click Configure.
Parent Topic: Storage node