My son has a dell 4300 with an 80 gb hardrive. He wanted more drive space so I put a 160 GB hardrive in(Western Digital Caviar SE). When it boots up I get a screen that says Secondary drive not reconized, But the primary list both drives. I know I hooked everything up right, Not sure about jumpers. Do you have to have jumpers on both hardrives? I noticed the old 80gb drive has 4 prongs where the jumper go's and the new one has 5. The OS is windows XP, And I want to make the new Hardrive the Master the old slave if I can do that. By the way, I pressed the F-2 button and turned the hardrives on or to Auto.