Okay, have 2 Hitachi drives in RAID 1 where OS goes. Have a WD 120 GB drive that contains all of the data from previous install. No, the WD was not the drive that the OS previously went in. It was used as a backup drive. After this intall, the drive shows up in bios, device manager, and disk management, but not in explorer. Under disk management, when I right-click everything is grayed out except for "Help" and "Delete Partition". It won't let me assign drive letter to the WD. What is going on here? Just about everything I had is on that WD drive, help!!! Thank.