From owner-freebsd-chat Mon Sep 8 00:21:02 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id AAA14701 for chat-outgoing; Mon, 8 Sep 1997 00:21:02 -0700 (PDT) Received: from nico.telstra.net (nico.telstra.net [139.130.204.16]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id AAA14696 for ; Mon, 8 Sep 1997 00:20:57 -0700 (PDT) Received: from freebie.lemis.com (gregl1.lnk.telstra.net [139.130.136.133]) by nico.telstra.net (8.6.10/8.6.10) with ESMTP id RAA06446; Mon, 8 Sep 1997 17:19:00 +1000 Received: (grog@localhost) by freebie.lemis.com (8.8.7/8.6.12) id QAA27061; Mon, 8 Sep 1997 16:48:52 +0930 (CST) Message-ID: <19970908164852.40911@lemis.com> Date: Mon, 8 Sep 1997 16:48:52 +0930 From: Greg Lehey To: Mike Smith Cc: hcremean@vt.edu, Simon Shapiro , chat@FreeBSD.ORG Subject: Re: lousy disk perf. under cpu load (was IDE vs SCSI) References: <19970908013227.32344@wakky.dyn.ml.org> <199709080546.PAA01604@word.smith.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.81e In-Reply-To: <199709080546.PAA01604@word.smith.net.au>; from Mike Smith on Mon, Sep 08, 1997 at 03:46:35PM +1000 Organisation: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8250 Fax: +61-8-8388-8250 Mobile: +61-41-739-7062 WWW-Home-Page: http://www.lemis.com/~grog Fight-Spam-Now: http://www.cauce.org Sender: owner-freebsd-chat@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Mon, Sep 08, 1997 at 03:46:35PM +1000, Mike Smith wrote: >> >> PS: When did the first voice-coil-seek hard drives come out? This is a >> question that's been bugging me for some time now... > > Linear or rotary actuator? I'd always equated "voice coil" with linear actuators. I'd guess the early 70s. We installed the first UNIVAC 8440s in 1973. I think they were voice coil. They looked like 3330 copies. > The linear VC actuator probably predates the use of stepper motors; I'd think so. The stepper motors wouldn't have got into hard drives until about the ST-506. Greg