I am really becoming impressed with Windows Server 2012 File and Storage Services. You can basically attach iSCSI or NAS or SAN types of devices to a Server 2012 system, and unite all disk space as if it were one logical entity.
With the iSCSI Target Storage Provider, a Windows System Administrator can easily and more readily manage "iSCSI virtual disks and snapshots from an iSCSI initiator" (from Windows Server 2012 Helpfiles). It is easily installed or added as a role, under File and Storage Services, under Server Manager.
Terabytes and Terabytes and even Petabytes of data, here we come!