Checking DVD's for errors?
 

Is there any way to scan an image to make sure it's complete?

I've got a couple of medias with a lot of scratches and I wanna make sure they're complete.

Does anyone know what I am talking about? I saw a program on a post here once, but I can't find it.

Make an ISO of them in Dvd Decrypter. It'll tell you if it has any errors.