Re: please help--tracks, sectors, VTOC, and disk geometry

[Andy McFadden <fadden@fadden.com>]

Andy McFadden <fadden@fadden.com> wrote:
> If you're looking at sectors in a "cooked" disk image (*.dsk, *.po, *.do,
> etc) they will always be the logical sectors. [...]

> If you're looking at sectors in a "raw" disk image (*.nib, *.nb2, *.app)
> they will USUALLY be the logical sectors. [...]

I'm mixing apples and oranges.  Tasty, but misleading.

Sectors in a "cooked" disk image are *stored* in a logical order.

Sectors in a "raw" disk image are *stored* in any order they want to be.

Sector editors usually display them in logical order, but logical order
requires a translation from physical number to logical number that is
different for DOS, ProDOS/Pascal, and CP/M.  Some programs allow you to
choose the translation you want, some select it based on what kind of
disk you appear to be looking at, and some just choose one and stick to it.

You can view them in any translation order on any disk image, assuming the
application is capable of doing the translation.  On a "raw" disk image
it's easy, on a "cooked" disk image it's a little harder, because the
application needs to guess the correct ordering of sectors in the image
(.do vs .po) before it can un-convert them back to raw.

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