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From: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac,comp.unix.aux
Subject: Re: Geometry of Apple SC80 (Quantum) disk
Message-ID: <7772@polya.Stanford.EDU>
Date: 16 Mar 89 16:39:35 GMT
References: <3083@stpstn.UUCP>
Sender: Marc T. Kaufman <kaufman@polya.Stanford.EDU>
Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
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Organization: Stanford University
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In article <3083@stpstn.UUCP> aad@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@polya.stanford.edu)