Ok, here's what happened. I had 2 drives in my athlon 700, asus KA7 botherboard system. 1st drive was a 6gig, 2nd drive 18 gig. I moved the 18 gig drive to my primary drive and added a 2nd 20 gig drive as the slave. Now when I boot up, every once in a while, the BIOS won't detect the 2nd drive...