Roommate's new MDD Powermac's superdrive is giving problems, he burnt two data DVDs in Toast and Finder and in both cases a verification error popped up (same data in both cases, 4.1GB worth). A lot of data cannot be accessed on the disk (Finder hangs while opening the folder)... The DVDs are Apple branded too.
So, anyone know what's wrong? He has two very pretty and expensive coasters now... Hopefully it isn't a hardware issue, though if it is, is the superdrive user-servicable?