ok so i have 2 sony dvd+R drives and i am contemplating buying a new Dual Layer Sony DVD drive. my question is say i want to make a back up of a dual layer disk can i use one of my 2 regular dvd drives to read the disc and the dual layer to burn or do i need to buy 2 dual layer drives inorder to read and burn. i have used apache2 and various other programs in extracting both layers so i know that my regular dvd+r drives can read it. didn't know how it would work with disc to disc direct burning.