Summary
This article provides a link to information on NetApp Deduplication, formerly known as Advanced Single Instance Storage (ASIS), starting from Data ONTAP 7.2.2.
Resolution
To implement NetApp Deduplication, obtain a NetApp license. This license is free. Refer to the following website for information on how to enable/disable, check status, or configure Deduplication on a volume:
https://colovirt.wordpress.com/2008/11/14/netapp-enabling-deduplication-asis-on-a-volume/