I have 1 esxi 5.1 server that I've built a bunch of VM's on connected to a 4TB iSCSI LUN.
I've recently spun up 2 new 5.5 servers.
Ideally, I would like to connect those 2 servers to the same iSCSI lun being used by the 5.1 server. Then, shutdown/forget each VM on 5.1, browse the datastore on 5.5, add to the inventory and start it back up. After all the machines are moved, I can make some hardware changes to the 5.1 server, blow it away, and install 5.5.
Am I asking for trouble or is this a reasonable way to do it?