A client of mine is seeking to upgrade some vSphere ESXi 4.1 hosts in remote offices using Update Manager. Virtual Machines are located on Local Storage.
Update Manager seems to be the logical choice here, as an interactive upgrade via Dell DRAC is not possible. However, I'm seeing that the upgrade to 5.1 won't work if the 4.1 host was previously upgraded from 3.5.
My Linux knowledge is sparse, but there is probably a way to view the current partition layout via Unsupported Mode or SSH that could reveal this?