Okay, I am in the process of installing a new hard drive. So replaced the old one with the new one, set it to master, etc. I leave my cd-rom drive as a slave as it was before. Now I put my old hard drive on the secondary IDE as a master. Then I ran the BIOS setup. Now, the problem comes. BIOS detected my new hard drive and cd-rom fine. BUT.... couldn't detect my old hard drive on the secondary IDE. Why and how do I fix this problem?