Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!cse!desimone
From: desimone@cse.uta.edu (David Desimone)
Newsgroups: comp.sys.cbm
Subject: Re: Which disks to use with 1571
Message-ID: <1991May1.044755.22531@cse.uta.edu>
Date: 1 May 91 04:47:55 GMT
References: <1991Apr28.005016.17886@noose.ecn.purdue.edu> <1991Apr28.082406.5055@nntp-server.caltech.edu>
Organization: Computer Science Engineering Univ. of Texas at Arlington
Lines: 22

In article <1991Apr28.082406.5055@nntp-server.caltech.edu> rknop@nntp-server.caltech.edu (Robert Andrew Knop) writes:
>Basically all of the 5.25" disks I use in my 1571 are double density; double
>density should work just fine.  What does NOT work, in my experience, is
>HIGH density disks.  These are higher density than double density, and I don't
>think the two are compatible.

That's right, a high-density (or quad density) disk requires the disk
circuitry to switch to a much stronger write signal, and the 1571
hardware can't generate enough magnetic field to write to one of these
disks.

Interestingly, the SFD1001, a high-density drive, has this exact same
problem, so that you must use double-density disks with it, even though
it uses more density than that.  With this drive I recommended that you
get GOOD QUALITY double-density disks.  I have not had a problem, except
when I tried to format a high density disk in the SFD.  :)

-- 
David DeSimone, aka "Fuzzy Fox" on some networks.          /!/!
INET:    an207@cleveland.freenet.edu                      /  ..
Q-Link:  Fuzzy Fox                                        /   --*
Quote:   "Foxes are people too!  And vice versa."         /  ---