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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/SIS_scan_is_extremely_slow_at_gathering_phase
      SIS scan is extremely slow at Gathering phase. SIS log just stops at Compressing and there is no further recording for slow scan task. Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-x...SIS scan is extremely slow at Gathering phase. SIS log just stops at Compressing and there is no further recording for slow scan task. Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-xxxxxxxxxxxx] /vol/volname [sid: 1607997095] Begin (sis start scan) Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-xxxxxxxxxxxx] /vol/volname [sid: 0] Info (Optimized scan)
    • https://kb.netapp.com/on-prem/ontap/DM/Efficiency/Efficiency-KBs/Move_volume_follows_the_error___Cannot_perform_efficiency_operations_on_deprioritized_volume
      Applies to ONTAP 9 Issue Run the volume move on the system manager following the below error: ONTAP API Failed: Failed to modify efficiency configuration for volume "volname" of Vserver "svmname": Can...Applies to ONTAP 9 Issue Run the volume move on the system manager following the below error: ONTAP API Failed: Failed to modify efficiency configuration for volume "volname" of Vserver "svmname": Cannot perform efficiency operations on deprioritized volume. To be able to perform efficiency operations, run "volume efficiency promote" command first. By the SIS-STATUS-L.XML of AutoSupport, the Auto State of the volume is Deprioritized .
    • https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Is_turn_volume_efficiency_ON%2F%2FOFF_equal_to_enable%2F%2Fdisable_the_in-line_compression%3F
      Error: command failed on vserver "cluster2-01" volume "vol0": Failed to modify efficiency configuration for volume "vol0" of Vserver "cluster2-01": Compression is not allowed on a root volume. Info: v...Error: command failed on vserver "cluster2-01" volume "vol0": Failed to modify efficiency configuration for volume "vol0" of Vserver "cluster2-01": Compression is not allowed on a root volume. Info: volume "dstvol1" of vserver "dstsvm1" is a SnapVault destination and the following volume efficiency schedule attributes are not applicable - "Job Schedule", "Duration", and "Enabled".
    • https://kb.netapp.com/on-prem/ontap/DM/Efficiency/Efficiency-KBs/Deduplication_savings_not_as_expected
      Applies to ONTAP 9.6 Volume efficiency Issue Volume has lower volume efficiency savings then expected. Volume efficiency operation had not started for a number of days due to auto policy being configu...Applies to ONTAP 9.6 Volume efficiency Issue Volume has lower volume efficiency savings then expected. Volume efficiency operation had not started for a number of days due to auto policy being configured. Vserver Name: vserver1 Volume Name: volume1 Volume Path: /vol/volume1 State: Enabled Auto State: Auto Status: Idle Progress: Idle for 311:24:28 Type: Regular Schedule: - Efficiency Policy Name: auto
    • https://kb.netapp.com/on-prem/ontap/DM/Efficiency/Efficiency-KBs/How_to_disable_deduplication_on_a_volume
      Applies to ONTAP 9 Description Disabling postprocess deduplication and inline deduplication independently on a volume
    • https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Active_IQ_Unified_Manager_reports_volume_efficiency_errors_on_SnapVault_or_Snapmirror_destination_volume
      Type XDP destination volume(s) Active IQ Unified Manager can report volume efficiency errors for Type XDP relationships The volume efficiency errors can be reported for either SnapVault or SnapMirror ...Type XDP destination volume(s) Active IQ Unified Manager can report volume efficiency errors for Type XDP relationships The volume efficiency errors can be reported for either SnapVault or SnapMirror destination volumes Example: Active IQ is reporting a volume efficiency risk on SnapVault destination volumes Risk - Volume Efficiency Operation Error Trigger Condition - Volume efficiency operation encountered the error: Operation was stopped Exclude volumes here that do not need alerting.
    • https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/AutoSupport_Message_sis_changelog_full_warning
      'sis.changelog.full:warning', message reported in the EMS log file and changelog has reached 100% or more. To fix this error, refer to the steps detailed in this article.