Microsoft site talks about this issue.
http://www.microsoft.com/whdc/device...e/GPT_FAQ.mspx

The maximum partition (and disk) size is a function of the operating system version. Windows XP and the original release of Windows Server 2003 have a limit of 2TB per physical disk, including all partitions. For Windows Server 2003 SP1 Windows XP x64 edition, and later versions, the maximum raw partition of 18 Exabyte’s can be supported. (Windows file systems currently are limited to 256 terabytes each.)

If you email me todd.maxwell@open-e.com I will send you a how to add Windows Dynamic Disk with our special script for activation of Dynamic Disks that you can try.

Please keep post to proper section, this is in NAS-R3 – should be in iSCSI-R3.