Some copy protection systems, like the PlayStation, rely on the physical location of the tracks to encode extra data, extracted via monitoring analog servo corrections. A full optical disk archive format would have to consider mapping at least some of that data.
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Some protections rely on the physical angular position of sectors in the single track bitstream. A format encoding that would have to encode the raw EFM bits *and* a detailed timing code encoding the exact coordinates of the data on disc.
Thankfully we don't *actually* need that level of duplication for accurate emulation.
