> Is it true that Xbox DVDs have the data spiral going from outside in rather than > inside out?
Xbox DVDs have the layers reversed (normal DVDs start on layer 0 and continue on layer 1; these start on layer 1 and continue on layer 0) and use a variant of the good old FAT filesystem. IIRC the first few blocks of layer 0 contains a small dummy UDF filesystem and a video track saying to put the disc in your Xbox, but not all discs did that I think. The actual sector encoding etc. is stock though.
Also, there are randomly-inserted security sectors. You run the disc generator, it randomly places those security sectors, and if there's not enough contiguous space for your biggest data file(s) you have to run the generator repeatedly until there is.
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