Upgrading from ESXi 5.5 to 6.5 using iso at the console. We have successfully upgraded 2 other host however on one host the upgrade is not finding the previous install of 5.5 so we are only getting the following two options (no upgrade option)
- Install ESXi, Preserve VMFS Datastore
- Install ESXi, Overwrite VMFS Datastore
We have rebooted the host and verified ESXi 5.5 is running and functional.
Any suggestions?