We have VMWare HA license, so which kinf\d of failover it allows - automatical failover of VMs form one host to another?
HA monitors heartbeat of your ESX Hosts. If heartbeat is lost, VM's that are running on the host that fails will be powered off then powered back onto the other host in the cluster assuming there are no resource violations and you have shared storage. If no shared storage don't bother to use HA, it won't work.
So, if you have HA and shared storge, create a cluster and use it, in my opinon.
Here's a couple other things worth looking into
I really like this one.
iSCSI SAN software