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From: ih@udel.edu (Charlie Ih)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Making a floppy drive ignore high density hole
Keywords: 3.5 drive, HD, DD, switch
Message-ID: <26007@nigel.udel.EDU>
Date: 29 Jul 90 16:11:17 GMT
References: <11547@ingr.com> <1990Jul19.021714.10040@world.std.com> <803@digi.lonestar.org> <1990Jul19.193954.29829@cunixf.cc.columbia.edu> <25160@nigel.udel.EDU> <1990Jul21.083532.15802@cunixf.cc.columbia.edu>
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Reply-To: ih@udel.edu (Charlie Ih)
Organization: University of Delaware
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In article <1990Jul21.083532.15802@cunixf.cc.columbia.edu> ezk@cunixf.cc.columbia.edu (Erez "HWank1" Zadok) writes:
>In article <25160@nigel.udel.EDU> ih@udel.edu (Charlie Ih) writes:
>> In article <1990Jul19.193954.29829@cunixf.cc.columbia.edu> ezk@cunixe.cc.columbia.edu (Erez "HWank1" Zadok) writes:
>> >In article <803@digi.lonestar.org> mfrohman@digi.lonestar.org (Matthew Frohman) writes:
>[...]
>
>I gather from your question that you're not familiar with basic electronics.
>That's ok.  Here's an explanation I hope would make sense.
>
>I could not have left the internal switch in open position b/c the minute I
>put a DD floppy inside (no 2nd hole) the internal switch would be pushed
>down, thus creating a short between the two points. .....

Thanks for the explanations.  If you had indicated that the switch
was activated by the disc, then it was necessary to removed it as you have
done correctly.  I thought that's what I phrased in my question.
I guess I did not make it clear.

I used the phrase "less chance to damage it" only in a relative sense.

An article following yours describes the Sony drive.  Thanks for the
information.

Charles S. Ih, Prof. of Electrical Eng., research interests in
	       electronics and opto-electronics.