I previously had an 80gb IDE and 200GB IDE drive and a 1TB Hitachi SATA drive running XP. I decided to upgrade to Win7 and at the same time replace the old IDE drives with a WD Black 750GB Sata 3. I put all my data on the Hitachi 1TB, installed Win7 on the WD, it seems fine, but My Computer won't recognize the Hitachi with all my backed up data. Device Mgr sees it, BIOS sees it, the WD HDD support software sees it, but I can't access it. I removed the drive via Device Manager, rebooted and again it was correctly identified by Windows and installed, but still not visible in My Computer. What am I missing? I did use a SATA 3 cable on the Hitachi (its a Sata 2), but I thought that was ok to do. Anything else I could have missed? Thanks for any help.