Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!hal!ncoast!allbery
From: allbery@NCoast.ORG (Brandon S. Allbery)
Newsgroups: comp.sys.mac
Subject: Re: SE question
Message-ID: <1989Oct12.231203.15676@NCoast.ORG>
Date: 12 Oct 89 23:12:03 GMT
References: <50037@<1989Oct2> <8400174@m.cs.uiuc.edu>
Reply-To: allbery@ncoast.ORG (Brandon S. Allbery)
Followup-To: comp.sys.mac
Organization: North Coast Public Access UN*X, Cleveland, OH
Lines: 19

As quoted from <8400174@m.cs.uiuc.edu> by gillies@m.cs.uiuc.edu:
+---------------
| How much difference is there between a superdrive and an IBM drive?
| It's sad when a 1.44 3.5" IBM drive is $89 from CompuAdd, and
| $350-$600 from Apple Computer, Inc.
+---------------

IBM-compatible drives use fixed speeds; Mac drives use variable speeds.
The latter co$t$ more than the former, and supporting *both* co$t$ even more.
(Why do Macs use variable speed drives?  Because 400K floppies are that much
nicer than 360K floppies (SS/DD), and 800K better than 720K (DS/DD).  (Do
SuperDrives provide a 1600K mode?)

++Brandon
-- 
Brandon S. Allbery, moderator of comp.sources.misc	     allbery@NCoast.ORG
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