Skip to main content
NetApp Knowledge Base

Why does FAS2720 show Inline Dedupe as false but deduplication effected?

  1. Last updated
  2. Save as PDF
Views:
27
Visibility:
Public
Votes:
0
Category:
fas-systems
Specialty:
core
Last Updated:

Applies to

  • ONTAP 9
  • FAS Series storage systems
  • Volume Efficiency

Answer

  • FAS series systems behave differently from AFF series regarding deduplication:
    • AFF Series: Inline deduplication is enabled by default
    • FAS Series: Inline deduplication is disabled by default
  • There are two types of deduplication:
    • Post-process deduplication - runs as a background process
    • Inline deduplication - processes data in real-time during writes
  • When volume efficiency on is executed on a volume, post-process deduplication becomes enabled.
  • The volume efficiency show -instance command can check the details of deduplication status. 

                                     Vserver Name: svm1
                                      Volume Name: vol1
                                      Volume Path: /vol/vol1
                                            State: Enabled
                                           Status: Idle
                                         Progress: Idle for 06:11:17
                                             Type: Regular
                                         Schedule: sun-sat@0
                           Efficiency Policy Name: -
                           Blocks Skipped Sharing: 0
                             Last Operation State: Success
                     Last Success Operation Begin: Tue Mar 03 20:28:47 2026
                       Last Success Operation End: Tue Mar 03 20:28:47 2026
                             Last Operation Begin: Tue Mar 03 20:28:47 2026
                               Last Operation End: Tue Mar 03 20:28:47 2026
                              Last Operation Size: 0B
                             Last Operation Error: -
                                  Changelog Usage: 0%
                                Logical Data Size: 1.40MB
                               Logical Data Limit: 640TB
                             Logical Data Percent: 0%
                                       Queued Job: -
                     Stale Fingerprint Percentage: 0
                                      Compression: false
                               Inline Compression: false
                          Storage Efficiency Mode: -
                               Constituent Volume: false
                                    Inline Dedupe: false
                                  Data Compaction: false
                Cross Volume Inline Deduplication: false
            Cross Volume Background Deduplication: false
                         Extended Compressed Data: false

  • However, this command:
    • Displays inline deduplication status directly
    • Does not have a dedicated field for post-process deduplication
  • To determine if post-process deduplication is enabled:
  • Check if the State field shows Enabled in the output
    If State: Enabled appears, post-process deduplication is active on that volume

Additional Information

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.