Path: utzoo!utgpu!watmath!iuvax!uxc.cso.uiuc.edu!garcon!uxa.cso.uiuc.edu!gcw20877
From: gcw20877@uxa.cso.uiuc.edu (G. Wang)
Newsgroups: comp.sys.ibm.pc
Subject: Re: WARNING: Counterfeit 3.5 HD disks!
Message-ID: <1896@garcon.cso.uiuc.edu>
Date: 30 Aug 89 18:40:39 GMT
References: <44566@bbn.COM> <40970021@hpindda.HP.COM> <2503@husc6.harvard.edu> <145@bmers58.UUCP> <2512@husc6.harvard.edu> <Aug.25.08.06.20.1989.24239@topaz.rutgers.edu>
Reply-To: gcw20877@uxa.cso.uiuc.edu (G. Wang)
Organization: University of Illinois at Urbana-Champaign
Lines: 16

In article <Aug.25.08.06.20.1989.24239@topaz.rutgers.edu> msmith@topaz.rutgers.edu (Mark Robert Smith) writes:
>One thing that needs to be remembered is that when disks are
>unformatted, the only difference between DD and HD disks is the
>Quality Control used.  HD disks have higher QC standards, because
>there is less room for error on them.
>
Just a friendly correction.... For 3.5 and 5.25 disks there *IS*
a difference in the media, at least for the brand name disks...
(Even the bulk disks from MEI that I use are different).. In general,
the media has a higher magnetic coercivity and higher recording
density....


George Wang
University of Illinois
Gcw20877@uxa.cso.uiuc.edu