Geometry of Apple SC80 (Quantum) disk

[Marc T. Kaufman]

In article <3083 at stpstn.UUCP> aad at stepstone.com (Anthony A. Datri) writes:

>I need the geometry for the 80 meg Quantum disk in an Apple 80SC drive.
>Any help appreciated.

There are $262D2 = 156370 sectors on the HD80.  This is 19 x 10 x 823.
I would make a first guess that this represents 823 cylinders, 10 heads, and
19 sectors per track. (other factorizations may be possible).

Marc Kaufman (kaufman at polya.stanford.edu)