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From: jones@fortune.UUCP
Newsgroups: net.periphs
Subject: Re: diskettes and x-rays - (nf)
Message-ID: <2648@fortune.UUCP>
Date: Tue, 28-Feb-84 23:06:18 EST
Article-I.D.: fortune.2648
Posted: Tue Feb 28 23:06:18 1984
Date-Received: Fri, 2-Mar-84 05:43:53 EST
Sender: notes@fortune.UUCP
Organization: Fortune Systems, Redwood City, CA
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#R:hsi:-11100:fortune:8500004:000:844
fortune!jones    Feb 28 18:11:00 1984

I would recommend reading "Erasing Myths About Magnetic Media", by
Sidney B. Geller in the March, 1976, Datamation.  A summary doesn't
do justice to the article, but you can get the drift:

	The study has found that a magnetic field supplies the
	only kind of energy that can cause undetected data
	destruction without any accompanying physical distrorion
	or damage to the magnetic storage media.  It has been
	determined that normally there is no need to shield
	the stored data against x-rays, high voltage fields,
	nuclear radiation, high frequency fields, or light
	energy.  Most important, a spacing of only a few inches
	is sufficient to protect the recorded media against
	magnetic fields which are far more intense than are
	*ever* found in the *normal environment*...(emphasis
	added)

Dan Jones 	Fortune Systems		(408) 595-8444 X440