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Article View: comp.sys.ibm.pc.misc
Article #10215

Re: Pizza Hut erases diskettes

#10215
From: Joe Trott
Date: Thu, 31 Dec 1992 15:53
21 lines
1412 bytes
avinash@sam.contex.com (Avinash Chopde) writes:

>This brings up another question---I have seen many persons (me too), 
>keep floppies close to the monitor.
>And the monitor is turned on and off once a day.
>I have done this for more than two years now, but my floppies are still
>readable, so it seems that the magnetic field on a floppy is quite
>strong and does not get destroyed easily.

>Yet, have heard horror stories of floppies near huge loudspeakers,
>or over a TV, etc, are these stories really true, or are they urban
>legends?

They are mostly true.  Loudspeakers and TVs (in fact _any_ appliance with
transformers including flourescent ballasts) emit _alternating_ magnetic
fields, which can destroy the data on a floppy instantly if strong enough.
In your case, the floppies probably aren't close enough, and/or they are
on a side of the monitor away from the flyback and any other transformer.
Also, your monitor probably has a cage around the loudest emitters.

-JTT
Technical Details
Message-ID: <1992Dec31.155326.3968@dcatlas.dot.gov>
Path: arc1-ca.pugleaf.net!sparky!uunet!dcatlas!joet
References: <1992Dec30.000429.24047@panix.com> <1992Dec30.213211.5311@cbfsb.cb.att.com> <3241@contex.contex.com>

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Newsgroups: comp.sys.ibm.pc.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!dcatlas!joet
From: joet@dcatlas.dot.gov (Joe Trott)
Subject: Re: Pizza Hut erases diskettes
Message-ID: <1992Dec31.155326.3968@dcatlas.dot.gov>
Organization: U.S Dept. of Transportation
References: <1992Dec30.000429.24047@panix.com> <1992Dec30.213211.5311@cbfsb.cb.att.com> <3241@contex.contex.com>
Date: Thu, 31 Dec 1992 15:53:26 GMT
Lines: 22