From owner-freebsd-chat Mon Sep 8 00:49:19 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id AAA16066 for chat-outgoing; Mon, 8 Sep 1997 00:49:19 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id AAA16058 for ; Mon, 8 Sep 1997 00:49:13 -0700 (PDT) Received: from word.smith.net.au (lot.atrad.adelaide.edu.au [203.20.121.21]) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) with ESMTP id RAA24981 for ; Mon, 8 Sep 1997 17:19:01 +0930 (CST) Received: from word.smith.net.au (localhost.atrad.adelaide.edu.au [127.0.0.1]) by word.smith.net.au (8.8.7/8.8.5) with ESMTP id RAA01934; Mon, 8 Sep 1997 17:11:45 +1000 (EST) Message-Id: <199709080711.RAA01934@word.smith.net.au> X-Mailer: exmh version 2.0zeta 7/24/97 To: Greg Lehey cc: Mike Smith , hcremean@vt.edu, chat@FreeBSD.ORG Subject: Re: lousy disk perf. under cpu load (was IDE vs SCSI) In-reply-to: Your message of "Mon, 08 Sep 1997 17:06:37 +0930." <19970908170637.25473@lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 08 Sep 1997 17:11:44 +1000 From: Mike Smith Sender: owner-freebsd-chat@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > > I was talking pre-1980 stuff; you would have to find a real fossil to > > tell you what they were using before that. 8) > > Thanks. The 2311 used hydraulics. Didn't I offer you the manual? > Anyway, it's somewhere in the shed. 70ms average positioning IIRC. > > The typical start to a bad day was to come in and find a pool of oil > under one of your disk drives. What did they drive the hydraulics with, though? A constant pressure compressor and what sort of solenoids? mike