Before you create a volume for use with Snapshot autodelete, you should estimate how large it needs to be.
Space required for Snapshot copies = ROC x number of days of Snapshot copies.
You would calculate the size of your volume as follows:
Volume size = Total data size + Space required for Snapshot copies.
The size of the volume in this example is 800 GB (400 GB + 400 GB).
For more information about the Snapshot autodelete function, see the Data ONTAP Storage Management Guide for 7-Mode, and for more information about working with traditional and FlexVol volumes, see the Data ONTAP Storage Management Guide for 7-Mode.