Hello,
I have tried with two HDD different (Seagate and Western Digital) both of 2Tbyte of memory.
When I tested the HDD with 'Partition Assistent' and 'HD Tune', the HDD works correctly under 1Terabyte; the second Terabyte appears damaged (all blocks damaged - RED).
With 'HD Tune', over the first Terabyte, the HDD address (position) becomes negative!!!
In add, it is impossible to format the second Terabyte in the HDD with Windows7 and Windows XP.

What I can to do?

My motherboard: ASRock Penryn 1600SLI-110dB.
Chipset: NVIDIA nForce 650i SLI SPP.
CPU: Inter Core 2 Duo E8400.