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Management controller unavailable SEL entry due to false positive AC lost event

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Applies to

  • NetApp H610S storage node
  • NetApp H615C compute node
  • System Event Log (SEL)

Issue

"AC Lost" SEL event prior the “Management controller unavailable” with sensor number 0x7a but a storage node did not reboot

SEL Record ID          : 00a7
Record Type           : 02
Timestamp             : 11/24/2022 11/24/2022
Generator ID          : 0020
EvM Revision          : 04
Sensor Type           : Management Subsys Health
Sensor Number         : 7a
Event Type            : Sensor-specific Discrete
Event Direction       : Assertion Event
Event Data            : 0306ff
Description           : Management controller unavailable

Here are SEL log entries as shown on H615C nodes -

Aug/12/2023    16:06:17        [Information]    [Power Unit]    [Power Unit]    Power Off / Power Down - Deasserted
Aug/12/2023    16:06:12        [Warning]        [BMC FW Health]    [Management Subsystem Health]    Management controller unavailable (BMC hardware watchdog timeout reset) - Asserted
Aug/12/2023    15:36:49        [Information]    [Power Unit]    [Power Unit]    AC Lost - Asserted
Jul/8/2023    15:36:18        [Information]    [Power Unit]    [Power Unit]    Power Off / Power Down - Deasserted
Jul/8/2023    15:36:13        [Warning]        [BMC FW Health]    [Management Subsystem Health]    Management controller unavailable (BMC hardware watchdog timeout reset) - Asserted
Jul/8/2023    15:14:23        [Information]    [Power Unit]    [Power Unit]    AC Lost - Asserted

 

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