vcenter server 5.1 with 3x esxi 5.0 hosts connected.
Till now we've been using the three hosts just in the same datacenter.
Implementing a SAN, and been told we should put them all in one CLUSTER. To do that i have to (to my understanding) remove the hosts from vcenter, and then add them again into the cluster I create.
Is it that easy? Will VMs that are running on the hosts stop running at any point? I get a warning that they will, but just want to make sure it's really that straightforward.
Any disadvantage to them being in a cluster?