In comp.sys.apple2 mdj  wrote:
> Unless such a format can allow for a bitream that records every
> readable flux transition in a continuous track at every possible track
> position, there's no way to guarantee it will not prove inadequate for
> some software title or another :(

The canonical example is a disk with physical damage; I think Mask of the
Sun used this approach.  The disk has a tiny pinhole bored in it.  You
get inconsistent data back when reading it, and you will certainly never
read back what you write.

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