How to Convert a DVD9 Dual Layer image to a single ISO file.
For many Microsoft Server products and SQL Server, the OEM OPK media ISO image is a dual layer DVD9 format with two folders: Layer0 and Layer1. If you want to burn it to a regular DVD or create a single ISO you need to convert it and this simple command is the best method. The actual command is: copy /b d:\layer0\image.dat+d:\layer1\image.dat d:\image.iso