Inconsistent DVD accessibility

[MR ZenWiz]

On Tue, Jun 14, 2016 at 1:20 AM, Ralf Mardorf <silver.bullet at zoho.com> wrote:
> In the old days one way of copy protection for the C64 was done by
> writing content to a position of the disk, that requires a head bump.
> The first generation of disk drives for the C64 had no protection
> against head bumps, but later drives had a light barrier, to prevent
> head bumps. It could happen, that legal bought software couldn't be
> loaded by some drives.
>
> IOW it might be that even today some kinds of copy protection are
> simply insane, offending standards. Today this at least is known for
> some windows software, that misuses the MBR.
>
> Perhaps some DVD _burners_ that are aimed for computers have a
> firmware, that doesn't allow to use them in the same way, as a DVD
> _player_ for the TV can be used.
>

Interesting point, but again, the DVD device in my laptop is a burner
too, just older.