I have an ISO image file sitting on a SSD. I have two DVD burners. All (DVD burners and SSD) are SATA connections.

If I burn the ISO using one DVD burner at a time, it takes 5 minutes each.

If I burn the ISO using both DVD burners at the same time, it takes 10 minutes.

I could understand it would take 10 minutes (using both burners) if the setup was on IDE. I thought the advantage of SATA is that the IO is separate. Why would it take twice as long when it is on a SATA setup?

I am using PowerISO to burn and have even tried Nero. Would I need a program that do simultaneous burn and perhaps that would achieve the goal of 5 minutes with both DVD burners?

Operating System is Windows 7 64bit.

Thanks