NetApp
7-mode/HA pair/V-Series : Volumes : Managing deduplication : What deduplication is

What deduplication is
Deduplication is a software option in Data ONTAP that eliminates duplicate data blocks to reduce the amount of storage space used to store data.
You can activate the deduplication license after installing Data ONTAP. Deduplication can only run on FlexVol volumes.
Parent Topic: Storage node