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Handling Watchdog Resets on the AFF A20 / AFF A30 / AFF C30 / AFF A50 / AFF C60 / FAS50

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Applies to

  • ONTAP 9
  • AFF A20, AFF A30, AFF C30, AFF A50, AFF C60

Issue

  • Node reboots unexpectedly.
  • Node does not reboot after an unexpected shutdown.
  • BMC events all output on the impacted node shows the following:

Record 499: Wed Apr 02 23:02:34.264247 2025 [IPMI.notice]: 01aa | 02 | EVT: 6fc824ff | System_Watchdog | Assertion Event, "Timer interrupt"
Record 500: Wed Apr 02 23:02:34.646754 2025 [IPMI Event.critical]: NMI
Record 501: Wed Apr 02 23:02:34.651210 2025 [IPMI.notice]: 01ab | 02 | EVT: 6f00ffff | CriticalInt | Assertion Event, "NMI/Diag Interrupt"
Record 502: Wed Apr 02 23:02:35.492102 2025 [IPMI.notice]: 01ac | 02 | EVT: 6fc124ff | System_Watchdog | Assertion Event, "Hard reset"
Record 503: Wed Apr 02 23:02:35.624499 2025 [IPMI Event.critical]: L2 watchdog timeout hard reset
Record 504: Wed Apr 02 23:02:35.655394 2025 [IPMI Event.critical]: System reset

  • If node reboots, the following error can be seen in the EMS log files:

[cluster-01:mgr.boot.reason_abnormal:EMERGENCY]: System rebooted due to a watchdog reset.

 

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