I installed ESXi 6.5 over an ESXi 5.1 host. The disks' datastores remained intact, but no VMs exist in inventory. When I browse a datastore and add a VM to inventory, the VM's icon in the inventory list appears faded, like it is disabled. When I power on the VM, nothing happens. When I try to power off the VM, I get an error that the VM is already powered off. The VM appears to be corrupted.
When I deploy a UVF template, it takes way too long (an hour instead of 6 minutes).
I'm a little frustrated; I tried this on a nested ESXi host and the VMs all worked fine. No problems.
Am I doing something wrong? Should I go back to 5.1?