[QUOTE=BoSox2882;2498925]Why is it not possible to do a 1:1 copy?
I for example use AnyDVD and then ImgBurn to ‘read’ and then ImgBurn to burn to dual layer. How is that not a 1:1 copy?[/QUOTE]
There is no such thing as 1:1 copy but as chef says all you need is the data to match the data on the source dvd and that is close as you come to 1:1 match. Only other way you get 1:1 dvd matching is to buy another dvd then you have 1:1 matching. If you do all the copy and backup correctly and go dvd5 to dvd5 and dvd9 to dvd9 without errors and with quality media and safe burning speed your end result should come out and play just like original dvd on standalone player.