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RaidDegradedMirrorAggrAlert after manual ONTAP upgrade

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Applies to

  • AFF-A900
  • ONTAP 9.15.1P11
  • MetroCluster IP

Issue

  • After performing a manual non-disruptive upgrade (NDU) of ONTAP in a MetroCluster IP (MCC-IP) environment, the raidDegradedMirrorAggrAlert appeared in EMS.
  • Multiple disks in the same shelf were reported as “FAILED” and not detected by ONTAP.
  • The affected aggregates (e.g., node1_aggr1/plex1 and node2_aggr1/plex1) were shown as offline, failed, and inactive.
  • RAID group status: “partial, block checksums” with missing disks.

Example:

  Plex /node1_aggr1/plex1 (offline, failed, inactive)
    RAID group /node1_aggr1/plex1/rg0 (partial, block checksums)

      RAID Disk Device       HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------       ------------- ---- ---- ---- ----- --------------    --------------
      dparity FAILED        N/A                        3650699/ -
      parity FAILED        N/A                        3650699/ -
      data FAILED        N/A                        3650699/ -
      data FAILED        N/A                        3650699/ -
      data FAILED        N/A                        3650699/ -
      Raid group is missing 5 disks.

  • The system was in “mirror degraded” state, impacting the SyncMirror function.

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