Using HD disks as DD disks

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#2778

From: Jeric Woo
Date: Tue, 22 Dec 1992 21:29

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I have some high density 3.5" and 5.25" diskettes that I would like to
use as low density diskettes.  However, whenever I attempt to format them
(using low density drives) I get either the messages "Bad or Invalid Media"
or the message "Track 0 Bad, Disk Unusable."

Why can't I do so?  Are the any other physical differences between high 
density diskettes and low density diskettes (I know that 3.5" HD has a hole
at the upper left hand corner, and that maybe HD disks has higher "surface
density").  I even ran the diskettes through a magnet before formatting
them, but still no luck.  Thanks!

Jeric

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Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!uwm.edu!zaphod.mps.ohio-state.edu!cs.utexas.edu!usc!news.service.uci.edu!students.uadv.uci.edu!jeric
From: jeric@berkp.uadv.uci.edu (Jeric Woo)
Subject: Using HD disks as DD disks
Nntp-Posting-Host: students.uadv.uci.edu
Message-ID: <jeric.67@berkp.uadv.uci.edu>
Newsgroups: comp.os.msdos.misc
Organization: University Advancement, University of Calif., Irvine
Keywords: disks, disk drive
Lines: 13
Date: 22 Dec 92 21:29:19 GMT