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