Simply put, DVD drives of all kinds can "tell the difference" between pressed DVD and the various recordable formats. There's extra info on the disk to say what type of recordable disk it is, and consoles are configured not to run anything that is not factory-pressed. That's what a modchip does, in essence. Well, it's certainly a large part of the role of a modchip. To disable the "media check". There's also the fact that you can't read an X-Box 1 disk in a PC, and you are unlikely to be able to read the new X360 disks in your PC, although I will admit to not having verified this information.
This post has been edited by DaBiscuit: Nov 26 2005, 12:15 PM