Exiting Maintenance Mode “end of header not found”

While running through a large vSAN cluster upgrade project recently i ran into the occasional issue where hosts would fail to exit maintenance mode following an upgrade from ESXi 6.7U3 to 7.0. The error seen was “A general system error occurred: end of header not found” This is caused by unused entries in the hostd

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Gathering vSAN Health information

Useful commands you can run to gather vSAN & Storage related information for troubleshooting  uptime vmware -vl esxcli vsan cluster get esxcli vsan health cluster list esxcli vsan health cluster get -t=”Overall disks health” esxcli vsan storage list esxcli storage core device list esxcli storage core device stats get Much of this is useful to

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