In de Servermanager of Windows 2012 Server you can add iSCSI Target Server.
Select a Disk location.
Give the Virtual iSCSI Disk a name
Size the iSCSI Virtual Disk
Create a New iSCSI Target
Give the iSCSI target a name
Create the iSCSI Virtual Disk
Assign the iSCSI Target to the virtual Clusternodes
Go to the iSCSI Initiator on the Cluster nodes and add the iSCSI Target Server
You Check the connectie on the Target Server that it is connected.
Bring the new iSCSI Virtual Disk online in Disk management
In your Clustermanager you can add the virtual iSCSI target disk to your virtual cluster on Windows Hyper-v 2012
Thanks.