Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site fortune.UUCP Path: utzoo!watmath!clyde!floyd!harpo!ihnp4!fortune!jones 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 Lines: 22 #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