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From: mc4c+@andrew.cmu.edu (Mark Choi)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: HD and DD floppies (Was: FTP problems)
Message-ID: <8bx06Ry00WAw88BWUu@andrew.cmu.edu>
Date: 30 Mar 91 03:10:21 GMT
References: <X103y1w163w@bluemoon.uucp> <2631@prles2.prl.philips.nl> <MbvwaYm00VIE08N4wf@andrew.cmu.edu>,
	<1991Mar29.010400.22832@jato.jpl.nasa.gov>
Organization: Carnegie Mellon, Pittsburgh, PA
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In-Reply-To: <1991Mar29.010400.22832@jato.jpl.nasa.gov>

> Excerpts from netnews.comp.sys.atari.st.tech: 29-Mar-91 Re: HD and DD
> floppies (Was.. Van Snyder@jato.jpl.nasa (836)

> On 5.25 inch disks, DS/DD (360K) and DS/HD (1.2M) use different
> coercivity
> media, 300 Oersted media for DS/DD and 600 Oersted for DS/HD.  If you put
> a DS/HD disk in a DS/DD drive, you might fry the heads.

This is not the case with 3.5 inch disks, however. Several articles have
been written about the subject in many magazines, and when asked, the
disk manufacturers admit as much. They try to add stuff about non-tested
reliability, but what it comes down to is that the disks are identical,
and if it formats and works O.K., then it has just passed the test. You
save by doing the test yourself.