aad@stpstn.UUCP (Anthony A. Datri) (03/16/89)
I need the geometry for the 80 meg Quantum disk in an Apple 80SC drive. Any help appreciated. -- @disclaimer(Any concepts or opinions above are entirely mine, not those of my employer, my GIGI, my VT05, or my 11/34) beak is@>beak is not Anthony A. Datri @SysAdmin(Stepstone Corporation) aad@stepstone.com stpstn!aad
kaufman@polya.Stanford.EDU (Marc T. Kaufman) (03/17/89)
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)
cander@unisoft.UUCP (Charles Anderson) (03/21/89)
From article <7772@polya.Stanford.EDU>, by kaufman@polya.Stanford.EDU (Marc T. Kaufman): > 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). Close, but not quite. There are 823 cylinders, 32 sectors per track, 6 heads, two alternate sectors per cylinder. Thus, there are 190 usable sectors per cylinder. -- Charles. {sun, amdahl, ucbvax, pyramid, uunet}!unisoft!cander