Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!cornell!batcomputer!dorin
From: dorin@batcomputer.tn.cornell.edu (Stewart Johnson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Hub ring on HD floppies
Message-ID: <3209@batcomputer.tn.cornell.edu>
Date: 17 Dec 87 12:14:28 GMT
References: <415@wa3wbu.UUCP>
Reply-To: dorin@tcgould.tn.cornell.edu (Stewart Johnson)
Organization: Cornell Theory Center, Cornell University, Ithaca NY
Lines: 19
Keywords: floppies

This is my first attempt at posting, forgive me if I mess it up.

Here's my guess: The old full-height black faced ibm floppy drive has a hub
engagement mechanism that is a real monster masher. Bad design. Even with
hub reinforcement rings it has tweeked alot of precious floppies. Later 
models, such as the half-height HD models, have a much smoother hub engagement
mechanism, thereby (supposedly) eliminating the need for a reinforcement ring.
I could be wrong.

Now I have a question: I know that hard drives use heavy energy and give 
off bunches of heat. But WHERE do they give off the heat FROM, the disk unit
or the controller? I would guess it is the disk unit, but if so then WHY
on all the PC/XT's is the hard drive on the right where it will experience
less efficient cooling?

dorin@mathvax.msi.cornell.edu
Stewart Johnson                                "Back Off--I'm a Scientist"
P.O. Box 492
Ithaca,N.Y. 14851