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From: rico@oscvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Monitor degaussers and Micro Floppies
Message-ID: <474@oscvax.UUCP>
Date: Mon, 2-Mar-87 09:45:05 EST
Article-I.D.: oscvax.474
Posted: Mon Mar  2 09:45:05 1987
Date-Received: Tue, 3-Mar-87 01:40:47 EST
References: <847@crash.CTS.COM> <1111@ulowell.cs.ulowell.edu> <560@hao.UCAR.EDU>
Reply-To: rico@oscvax.UUCP (Rico Mariani)
Organization: Ontario Science Centre, Toronto
Lines: 29
Summary: 

In article <560@hao.UCAR.EDU> hull@hao.UUCP writes:
>> (Bob Page) writes:
>> You should check other things.  First is disk quality.  Second is
>> proximity to the monitor degaussing circuits and other electromagnetic
>> fields - tipping the *amiga* up could bring it too close to these
>> circuits.  
>Holy Bit Map Batman!  This never occurred to me, and I work with this stuff
>all the time.  Ok.  So how many times can one subject a floppy disk to
>monitor turn-on (Say, with the disk sitting on top of the monitor, fer
>instance) before the disk goes bits-up?  Has anyone out there done an
>experiment with this?  

Just the other day, I was trying to corrupt a Macintosh disk so that I could
re-format it as single-sided.  So I took the disk and but it in front of
this big Hitachi monitor that I use and hit the DEGAUSS button, I held
it there for a while with the button down until the screen stopped
doing the funny things it does during degaussing, then waited for a while
and repeated this several times.  The net effect on the disk was.... nil.
The Mac read the disk sans hitch.  No files lost or anything.  What does
this tell me?  The chance of accidentally wiping out a disk by exposure
to a monitor's electro-magentic fields is virtually zero.

But don't forget, I don't know what I'm talking about...

	-Rico
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