So I got two WD Black 750GB drives. Plugged them into SATA2 and SATA5 ports on my Abit IP35-E MB (the IP35-E goes SATA1, 2, 5, and 6 - 3 and 4 don't "exist" on this mobo). On startup the BIOS showed one drive fine but the other showed BzBzBzBzBzBzBzBzBzBzBzBz as its identity. It was no surprise when it didn't show up in the Windows System / Computer Management panel. So I turned off the system and moved that drive to an external enclosure. When Windows came back up it detected the enclosure and said there was a drive detected, but again no drive showed up in Computer Management. I put my fingers on the drive and felt no vibration (as in spinning platters).