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    • https://kb.netapp.com/on-prem/ontap/DM/Efficiency/Efficiency-KBs/How_to_Enable_Compression_and_Deduplication_on_an_Existing_Volume
      Applies to ONTAP 9 Storage efficiency Description This example adds compression and deduplication savings to an existing FlexVol volume with data already on the volume. This example includes the steps...Applies to ONTAP 9 Storage efficiency Description This example adds compression and deduplication savings to an existing FlexVol volume with data already on the volume. This example includes the steps involved if you want to compress and deduplicate the data already on disk, in addition to the new writes to disk.
    • https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Can_post_process_compression_work_without_deduplication
      After enabling compression, deduplication can be disabled, and postprocess compression will still function and provide space savings. Enable Deduplication and Compression: (Prerequisite to enable comp...After enabling compression, deduplication can be disabled, and postprocess compression will still function and provide space savings. Enable Deduplication and Compression: (Prerequisite to enable compression is that Deduplication should be enabled before enabling compression ) Run Postprocess Compression: Compression will continue to run as scheduled, compressing data blocks and providing space savings.