As windows used 32bit block numbers lowest storage stack, this actually limit to support single storage drives (LUNs) using hardware raid not having more than 2TB.  In order to have logical disk more than 2TB, disk format must convert from MBR (Master boot record) to GPT (GUID partition tables) to be usable.

How to convert from MBR to GPT

1. download diskpart

2. use diskpart command. Open command prompt-> type diskpart

3. at diskpart prompt, type list disk.

4. at the diskpart prompt, type select disk <disk number>

5. at the diskpart prompt, type clean. Clean command will delete partitions and volumns on the disk

6. then type convert gpt

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