http://redump.org/disc/128031/

XGD3

label for undefined wave under security sector ranges. Disc structure and size matches later Xbox Preview discs and Kinect Rush, sector ranges are not a match but very close. Given that "XGD3" is shared between these discs and "final" discs using the format, same logic should apply/does not share commonality with standard XGD2 waves.

Unfortunately there's only one person who can add this label to the SS box on redump pages, and I doubt they'll be seeing this forum post. I'll make the comment clearer to anyone coming across this.