VMware, VMotion, DRS and other VMware feature needs a SAN ! If you work for VMware probably you have 5 or 6 SAN under your desk and 3 new servers. In the Real World…. you need to figure out your test with a limited budget.

So for those people like me, you can try the OpenFiler Virtual Appliance, they provide a simple interface and you will be able to deploy your ESXi to connect with iSCSI and test out your VMotion, DRS, and so on…

The virtual appliance can be found : http://www.vmware.com/appliances/directory/344

The official Website :
http://www.openfiler.com/

A quick intro with Petri KB
http://www.petri.co.il/use-openfiler-as-free-vmware-esx-san-server.htm