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Article #4796

Re: Unformatting disks?

#4796
From: Eric Pepke
Date: Tue, 19 Sep 1989 15:14
24 lines
1643 bytes
Anecdote:

A long time ago, I had an industrial strength bulk tape eraser.  The thing 
drew about 10 amps.  When you put a tape on it and turned it on, the tape 
vibrated and made a noise rougly equivalent to a steam jackhammer.  One had to 
take the tape at least 10 feet away from the eraser before switching it off
to avoid magnetizing the tape from the half cycle when the switch opened.

At this time, I had some low density TRS-80 disks I wanted to erase, and I
figured this would be a good way to do it.  I rubbed each disk on the
deguasser for about 30 seconds.

As far as I could tell, not a single bit was erased.

The oxide they use on disks is HARD.  If you want to erase disks, make sure
your deguasser is designed for the job.

Eric Pepke                                     INTERNET: pepke@gw.scri.fsu.edu
Supercomputer Computations Research Institute  MFENET:   pepke@fsu
Florida State University                       SPAN:     scri::pepke
Tallahassee, FL 32306-4052                     BITNET:   pepke@fsu

Disclaimer: My employers seldom even LISTEN to my opinions.
Meta-disclaimer: Any society that needs disclaimers has too many lawyers.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!gatech!prism!vsserv!loligo!pepke
References: <5261@merrimack.edu> <909@eutrc3.urc.tue.nl>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!gatech!prism!vsserv!loligo!pepke
From: pepke@loligo (Eric Pepke)
Newsgroups: comp.sys.mac
Subject: Re: Unformatting disks?
Message-ID: <200@vsserv.scri.fsu.edu>
Date: 19 Sep 89 15:14:18 GMT
References: <5261@merrimack.edu> <909@eutrc3.urc.tue.nl>
Sender: news@vsserv.scri.fsu.edu
Reply-To: pepke@loligo.UUCP (Eric Pepke)
Organization: Supercomputer Computations Research Institute
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