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Grading Checklist

  • Identified the firmware version mismatch between updated and un-updated hosts
  • Correlated the I/O errors specifically to the un-updated hosts
  • Reviewed HBA firmware release notes for breaking changes or compatibility issues
  • Checked multipath status on affected hosts (multipathd show paths, multipath -ll)
  • Investigated FC fabric switch logs for RSCN (Registered State Change Notification) storms
  • Recognized that the new firmware's FPIN support is causing RSCNs that confuse older firmware hosts
  • Proposed completing the firmware update on remaining hosts as the primary fix
  • Suggested interim mitigation: isolate old-firmware hosts in separate zones if possible
  • Verified the lpfc driver version compatibility on both firmware levels
  • Checked that multipath settings (path_checker, polling_interval) are consistent across the fleet
  • Recommended a proper change management process: firmware updates should be all-or-nothing within a zone group
  • Addressed the need for a rollback plan if the firmware update causes new issues