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From: cur022%cluster@ukc.ac.uk (Bob Eager)
Newsgroups: comp.sys.ibm.pc.hardware,comp.multimedia,comp.misc
Subject: Re: Diffs between DD & HD disks
Message-ID: <22191.28006b16@cluster@ukc.ac.uk>
Date: 8 Apr 91 13:07:34 GMT
References: <1991Apr6.170017.24990@news.iastate.edu> <1991Apr6.234019.2894@agate.berkeley.edu> <571@lysator.liu.se>
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 13

In article <571@lysator.liu.se>, zap@lysator.liu.se (Zap Andersson) writes:
> Most diskette manifacturers use the same media for 1.44 and 720k disks.
> However, a test is done on each disk, and if it falls below a certain
> threshold in reliability, they go in the 720k bucket, otherwise they
> will become 1.44 Meg's.....

This was true for single-sided vs. double sided disks, where the media
used the same coating both sides. It's true for chips, too. It is NOT true
for DD vs. HD disks - the actual magnetic coating has a different makeup.
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Bob Eager                | University of Kent at Canterbury
                         | +44 227 764000 ext 7589
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