I have a Samsung DVD Drive and an LG cd writer installed in my pc. Recently i borrowed a pioneer DVD writer from my friend to take backups from my 80Gb HDD. I took backups on 6 dvd's and after burning checked them on the pioneer drive, it worked fine. But now if i load the dvd into my old samsung drive i get a message "Windows cannot read from this disk. the disk might be corrupted, or it could be using a format that is not compatible with windows". if i load other dvd's (digit etc) it works fine. I also took backup of my mp3 collection and that works in my plain old dvd/mp3 player but not on my samsung dvd drive. And as i mentioned all the dvd's that i took backup in worked well in the dvd writer. Since i returned the dvd writer, i am stuck!