QUOTE(thesonandheir @ Nov 17 2011, 04:06 AM)

Tiros, the guy sure knows his onions alright.
He definitely does. People (read: C4E/#fw 'groupies') don't give him the credit he deserves. I think sometimes he's a little too definite in his proclamations, but he's no slouch when it comes to knowledge of this stuff.
QUOTE(Mr.RedRing @ Nov 17 2011, 10:37 AM)

I do not understand why, if we rip a retail XGD3 backup using the 0800 firmware, and then burn with LT Burner Max, why would that disk still fail current AP2.5 checks? It's not like the AP2.5 data on the physical disc changes every other week.. I plan on buying the Halo Anniversary remake today, if I buy that game it will have the same AP2.5 replay data on it 1 year from now. I could be missing something or not understanding something correctly though...
If I can speak a little more on this topic: it's not that the responses are stored on the disc, but that they are calculated from angles whose result is known. Since the angles don't change as they are physical versions of highs and lows, 1s and 0s, they are constant and can be used in calculations to arrive at consistent results. If my understanding is correct (and someone please correct me if I'm wrong about this), there are theoretically virtually infinite combinations of challenges that can be calculated from each disc. The major limitation thus far has been the DAE table, and that is because it can't store an infinite number of challenges. If it could, it would be almost impossible to bypass or fulfill AP2.5 requirements with present implementations.
As for the Hitachi and Sammy drives: only those drives which don't support AP2.5 are free from these problems. Some Hitachis do support AP2.5, so you need to be sure that the drive your console has doesn't support AP2.5 before you try to use it for AP2.5 games.