We have a ESXi environment with hosts in 5.0 and 5.1 versions.
We would like to upgrade our VM hardware versions (currently in version 4) to the version 8, which is the maximum supported by 5.0.
The issue is that if we use the 'Upgrade Virtual Hardware' option in a VM hosted in a 5.1 hosts it automatically upgrades it to hardware version 9.
The workaround that we know about is to migrate the VM to 5.0 host, perform the VM hardware upgrade there and then migrate back... obviously this is not an efficient way of upgrading +100 VMs.
Any ideas how to perform a VM hardware upgrade to version 8 in a 5.1 host?