DVD Connection with Hard Drives

I Would like to know the best combination to connect 2 dvd burners with 2 hard drives. Is it better to connect 2 hard drives on Primary IDE and 2 DVD burners in Secondary IDE, or 1 hard drive and 1 dvd burner on each IDE respectfully. The objective would be to optimize the burning speed when I burn 2 different DVD titles at the same time. Does it make any diffrence on what configuration I chooce?

Thank you

Optimum is to burn from HD with no software on it (just data), on one ide and have your burner on the other ide.