Do NOT ask where i got this from. Take it or leave it.
One of SafeDisc 2.8’s methods of copy protection is with invalid data in the first pre-gap.
The first pre-gap is blocks -150 to 0 before track 1.
When using a writing method like emulation to backup SafeDisc 2.8 titles, the pre-gap are is just emulated.
The resulting backup disc can be used, but the pre-gap data is not the original data. It is a little different.
In this mode, the same emulated pre-gap information will be provided. This fake information can lead to a shortfall in the program as the fake information can be voided by Macrovision’s methods.
It seems only a limited number of drives can do this.
All drives featuring MediaTek chipsets, which include Lite-On drives (over 12x writing and higher) and the new LG DVD Multi writer.
Also the Plextor PX-820 and PX-4220 can read this information, but the latest Plextor drives don’t include any support for this.
Any ideas ?