Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!liuida!isy!marc From: marc@isy.liu.se (Marc Ahlse) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: DS/DD --> DS/HD 3.5" Disk Notchers Message-ID: Date: 12 Mar 91 23:08:24 GMT References: <1991Mar11.182336.3274@vax5.cit.cornell.edu> <19536@brahms.udel.edu> Sender: news@isy.liu.se (Lord of the News) Distribution: comp Organization: Dept of EE, University of Linkoping Lines: 26 sguerke@brahms.udel.edu (Stephen Guerke) writes: >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 I've been looking for just such a notcher, any pointers WILL be appreciated. I know a big company around here that actually uses one, and they tried to convince me that it worked. So I took a few samples and tested them. No problem. I guess it's cheaper to produce one type of media and sell it to two different markets than to have two different products. As you probably know, that's what way they do with modern sewing machines, cripple them and sell them as a 'budget offer'. marc@isy.liu.se