Ran diagnosis on both logical drives nad both power supplies (only four things in the Diagnosis Log tab), all check out ok. Error and System event logs are both empty.
Was about to say "Management log has old stuff I assume from when the machine was set up in 2015." but just noticed it's not sorted by date but by class. Did find two critical POST Messages at bottom of list:
Option ROM POST Error: 1719-Slot 0 Drive Array - A controller failure event occurred prior to this power-up. (Previous lock up code = 0x12)
Option ROM POST Error: 1716-Slot 0 Drive Array - Unrecoverable Media Errors Detected on Drives during previous Rebuild or Background Surface Analysis scan
I check the boxes, clicked "Set Selected Items to be Repaired" now their status says "repaired."
Maybe that's all there is to it?
Thanks,
Jeff