VM/Etc have posted an excellent article about a free iSCSI SAN VM appliance that you can download from Xtravirt
it uses replication between 2 ESX hosts to allow you to configure DRS/HA etc.
Excellent, I’m going to procure another cheap ESX host in the next couple of weeks so will post back on my experiences with setting this up, my previous plan meant I’d have to get a 3rd box to run an iSCSI server like OpenFiler to enable this functionality, but I really like this approach.
Sidenote - Xtravirt also have some other useful downloads like Viso templates and an ESX deployment appliance available here
