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From: sguerke@brahms.udel.edu (Stephen Guerke)
Newsgroups: comp.sys.ibm.pc.misc,comp.sys.ibm.pc.hardware
Subject: Re: DS/DD --> DS/HD 3.5" Disk Notchers
Message-ID: <19536@brahms.udel.edu>
Date: 12 Mar 91 16:44:00 GMT
References: <1991Mar11.182336.3274@vax5.cit.cornell.edu>
Followup-To: comp.sys.ibm.pc.misc
Distribution: comp
Organization: University of Delaware
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In article <1991Mar11.182336.3274@vax5.cit.cornell.edu> u9hx@vax5.cit.cornell.edu writes:
>Does anyone own one of those disk notchers that punches a hole so that you can
>format a 720k disk into a high density disk?  If so, does it really work?  How
>reliable is such device?
>
>I have heard stories on both sides, and am trying to decide if I should invest
>in one myself.  Thanks

IMHO you're taking a chance.  The media on a HD diskette is much
much more dense than that on a 720K diskette.  It is my understanding
that at the factory(s) the diskettes are tested for density and those
that pass are marked HD and those that don't are marked DD.  I
wouldn't trust MY data to such a diskette.  One of the faculty members
that I support, who used DD density diskettes formatted HD for backing
up data, had data on one of the diskettes just sorta fade away, he has
since invested in HD diskettes and transferred his surviving data.