I have some PioData DVD-R 4x, which when I check says they are made by CMC Magnetics. When I burn a DVD using Nero it burns fine, but then when I do a data verification straight after burning it comes up with loads of errors.
When I do a movie on a DVD it will only play for a few chapters as well, before skipping about and then my DVD player telling me I’ve got a dirty disc in. I’ve also noticed that when I try copying a DVD that i’ve burned myself, it won’t allow me to copy them, due to finding errors. Even though they’re not scratched or dirty.
The media wasn’t ultra cheap either.