If you enable both the volume autosize capability and automatic Snapshot deletion for the same volume, you can also specify which method Data ONTAP tries first when that volume needs additional free space. How you configure the volume depends on whether you would prefer that the volume continue to grow or that Snapshot copies are deleted.
In most cases, the default configuration (growing the volume first) is preferable, because when a Snapshot copy is deleted, it cannot be restored. However, in certain situations, you might want to avoid growing the size of a volume when possible. In this case, you can configure Data ONTAP to delete Snapshot copies before increasing the size of the volume.
The following command configures Data ONTAP to delete Snapshot copies before increasing the volume size for the volume vol0001: vol options vol0001 try_first snap_delete