Using two SATA hard drives.
Do they show up in the disk management section of computer management?
To get there go to Start, right click "Computer" select "Manage". Then when the page pulls up click disk management on the left. Then see if you can find it in there. It might give you some insight on what is going on.
With SATA they completely removed the Master/Slave function. Each drive functions independently which makes it nice. 😀