Well, if you move the burner to the secondary channel, you can do on-the-fly recording from your DVD-ROM faster and more reliably. But that would mean investing in a second IDE cable. Right now, your system will have just one cable with both optical drives plugged into it. And any IDE cable will have only 40 “pins” but the better ones will have 80 conductors or wires. The extra ones are for grounding purposes and to reduce the risk of crossover while transmitting data at high speed. Open up your cabinet and check to see which cable you have currently. If it has only black connectors and thickish conductors, then it’s a 40 wire one. If it has blue and grey connectors and a thin conductors, then it’s an 80 conductor one.
By the way, we seem to have lost track of your problem here! Are your burns failing at 4x? What errors are you getting with the current setup? Please enlighten.