I purchased this exact same drive (120 GB WD) at Outpost.com a few days ago. After installing the drive I left the jumpers (Both master and slave drives) on CS, and noticed really slow transfer times from hard drive to hard drive. The Shadow pointed out that the settings in device manager might've been the problem, an lo and behold, he was right. Changed them to automatically use DMA and rebooted. Problem was still there.
Went into my BIOS, and it claimed I didn't have a second drive installed. Switched the jumpers to master (60 GB) and slave (120 GB) and switched on auto detect for primary slave drives. It recognized the drive during bootup, and bam. STOP error (Blue screen) before Windows even boots up. The error says something along the lines that the boot volume is unreadable or corrupted. I can't even get to the command prompt before that bloody blue screen comes up. If possible, I'd like to salvage my music collection. Any options outside of reformatting?
Edit: BTW, I've since removed the 120GB drive, and have placed the jumpers in the Master drive back in the CS position. Reverted back to the original BIOS settings and the problem is still there.