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Re: 800k drives (was Re: Apple IIc)

Subject: Re: 800k drives (was Re: Apple IIc)
From: zcaa1122@rpool4.rus.uni-stuttgart.de (Wulf Hofbauer)
Date: 9 Jun 1993 07:36:29 GMT
Newsgroups: comp.sys.apple2
Organization: Regionales Rechenzentrum Uni Stuttgart
References: <georget.738189543@cs.man.ac.uk> <1uiaukINN5k3@iraun1.ira.uka.de>> <Mg3VtCa00UzxM2BMl1@andrew.cmu.edu> <musjndx.739129940@gsusgi1.gsu.edu>

In article <musjndx.739129940@gsusgi1.gsu.edu> musjndx@gsusgi2.gsu.edu (Jonathan N. Deitch) writes:
>IBM drives are simple MFM format drives.  Apple drives use GCR (Group Code
>Recording) which requires a variable speed motor depending on the current
>track number.

GCR doesn't require variable drive speed in any way. The 5.25" disks
(disk ][) use also GCR.
CLV (constant linear velocity) is used on the 3.5" drives to increase the
capacity only.

- Wulf Hofbauer

References:
- Re: Apple IIc
  - From: voss@i40s16.ira.uka.de (Stefan Voss)
- 800k drives (was Re: Apple IIc)
  - From: Robert Sturges <rs43+@andrew.cmu.edu>
- Re: 800k drives (was Re: Apple IIc)
  - From: musjndx@gsusgi2.gsu.edu (Jonathan N. Deitch)

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