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    • How to troubleshoot PCI/NMI, UMCE, and nested machine check exception panics
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_troubleshoot_PCI_NMI_UMCE_and_nested_machine_check_exception_panics
      KB article describes how to troubleshoot the panic types - PCI/NMI, UMCE, non-PCI UMCE and nested machine check exception panics.
    • watchdog nmi on cpu 43, hang cpu is 6 in process idle followed by nested machine check exception in AFF A/C800
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/watchdog_nmi_on_cpu_43_hang_cpu_is_6_in_process_idle_followed_by_nested_machine_check_exception_in_AFF_A_C800
      Applies to AFF A800 AFF C800 Automatic controller takeover event reported HA Group Notification (CONTROLLER TAKEOVER COMPLETE PANIC) EMERGENCY PANIC: watchdog nmi on cpu 11, hang cpu is 7 in process i...Applies to AFF A800 AFF C800 Automatic controller takeover event reported HA Group Notification (CONTROLLER TAKEOVER COMPLETE PANIC) EMERGENCY PANIC: watchdog nmi on cpu 11, hang cpu is 7 in process idle: cpu11 on release 9.9.1P5 (C) on Mon Jan 10 01:11:06 GMT 2022 version: 9.9.1P5: Sat Nov 20 07:21:04 EST 2021 PANIC: nested machine check exception detected on CPU 14, no coredump will be generated. Requesting SP to power cycle the filer to attempt to clear the Machine Check Event