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NAS users intermittently unable to access flexgroup volume paths

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Category:
ontap-9
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nas
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Applies to

  • FlexGroup rebalancing
  • CIFS
  • NFS
  • ONTAP 9.12.1 and later

Issue

    • Intermittent issue while accessing using applications for flexgroup file path

    2025/04/03 15:13:50 ERROR : Attempt 1/3 failed with 23 errors and: write \\?\UNC\svm-dummy\\MEDIA FILES\Storyboards\PeopleGroup\v4\PEOPLE_DATA.zip: A device attached to the system is not functioning

    • EMS logs show ndrfm is set to auto

    [?]  Thu Apr 03 13:56:14 +1000 [CLUSTER-01: wafl_exempt08: wafl.ondemand.started:notice]: OnDemand operation started: FlexGroup rebalance operation on volume vol_main (DSID 1048 to 1049). ndrfm(auto) source_fh=510124.181920646 path=/Temp/2025-04-03_13-55-54_alex.j/PROJECT_DATA_RAW.mb destination_constituent=vol_main__0002 operation_UUID=b0fd5057-2197-49c2-a82d-fec4d51cf048.
    [?]  Thu Apr 03 13:56:14 +1000 [CLUSTER-01: wafl_exempt05: wafl.ondemand.srcQuiesced:debug]: OnDemand operation source quiesced: ndrfm(auto) path=/Temp/2025-04-03_13-55-54_alex.j/PROJECT_ASSET_RAW.mb mfh=1048~510124.181920646 sfh=1048~510126.181920646 on vol_main__0001(DSID:1048) operation_UUID=b0fd5057-2197-49c2-a82d-fec4d51cf048
    [?]  Thu Apr 03 13:56:14 +1000 [CLUSTER-01: wafl_exempt09: wafl.access.fenced.file:notice]: The file with inode 510124 on volume vol_main__0001 cannot be accessed because it is fenced by multiple operation.

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