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FAS80XX system input power lost with no "power loss" warning messages in dual enclosure HA configuration

Applies to

FAS80xx Dual Enclosure HA (controller in controller / two-in-a-box) configuration

Data ONTAP 8.3.x and later

Issue

Impacted node unexpectedly loses power, leading to a node shutdown without any warning messages. Impacted node will either (depending on the configuration) autoboot back to waiting for giveback, or autogiveback after the event.