With Hyperflex in the later stages of support you should get used to applying patches direct from VMware. https://www.cisco.com/c/en/us/td/docs/hyperconverged_systems/HyperFlex_HX_DataPlatformSoftware/HyperFlex_upgrade_guide/5-5/b-hx-upgrade-guide-fo...

Yes. Send a new tech support file.  

These older M4 logs make my head hurt as the M5+ newer logs have a much better layout for fan speed logging. I don't see any issue with the HBA itself. But did notice one strange thing in the logs somewhat related to the storage controller: var/storp...

Nutanix hard coded server firmware (c-bundle) 4.3(4a) before Cisco deferred (infra bundle) of 4.3(4a). Use 4.3(4e) A.bin and upload 4.3(4a) C.bin.