OK, i have a Dell Optiplex 270, 2.6 GHZ Processor, 1GB Ram, and a 40 GB Hard Drive. Well, I took out my "Working" Hard Drive from my other computer and i wanted to do have the 160 GB Hard Drive be my Slave Drive. So i hook up both drives and the computer says there is no hard drive at all, if i take out the drive, it starts up, so, I'm starting to think the drive is messed up, i take out the 40 GB drive and hook up the 160 GB Drive and it boots up, so, i know it ain't the drives, now I'm thinking it's the jumper on the drives, i move them around and i can't seem to get it to boot up, i have two hard drives, both connected on the same ribbon cable, i have a cable that goes to the front usb, and a cable that goes to my DVD burner. I have a floppy, but i disconnected because i don't use the floppy. Where the jumpers are there are Five rows of pins on all of them, how should i set-up my jumper settings, because i can't find anything on the net or I'm not typing the right thing to search for. Thanks To whoever can help me. Oh, i have IDE cables, not SATA. Thanks.