Hi,
Since you are new to testing environment just kick start with "KernSafe" small ISCSI initiator software for your lab environment. It will acts as Shared storage.
Note: U need to enable a option "Visible to more target" to see your both Esxi servers.
Download software from below link:
http://www.kernsafe.com/download.aspx
@Vmware freelancers/Experts,
Please Share your knowledge to make above request answered with valid inputs from your end.
Cheers,
Bhaskar Manogaran.