From owner-freebsd-hackers Mon Oct 20 20:26:21 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id UAA13533 for hackers-outgoing; Mon, 20 Oct 1997 20:26:21 -0700 (PDT) (envelope-from owner-freebsd-hackers) Received: from sasami.jurai.net (winter@sasami.jurai.net [207.96.1.17]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id UAA13521 for ; Mon, 20 Oct 1997 20:26:16 -0700 (PDT) (envelope-from winter@jurai.net) Received: from localhost (winter@localhost) by sasami.jurai.net (8.8.7/8.8.7) with SMTP id XAA05988; Mon, 20 Oct 1997 23:25:54 -0400 (EDT) Date: Mon, 20 Oct 1997 23:25:54 -0400 (EDT) From: "Matthew N. Dodd" To: dkelly@hiwaay.net cc: Joe McGuckin , freebsd-hackers@FreeBSD.ORG Subject: Re: 2.2.2-RELEASE '875 SCSI won't negotiage In-Reply-To: <199710210124.UAA14405@nospam.hiwaay.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Mon, 20 Oct 1997 dkelly@hiwaay.net wrote: > It really bugged me that my UW HD on PentiumPro was being beat by a P-133 > with narrow SCSI. Then I began to wonder if there was a difference between > inner and outer tracks. This fs starts about 200M past block 0, while the > above (up 2, the IBM) starts 2.4G from the end of the disk: Which is why you buy the largest, fastest drives available and short stroke them when you want a really fast RAID system. 10k RPM drives are nice but the track to track seek delay is still a large factor in performance. Ideally I'd have an array of 100s of disk, each using only the outer track. In a RAID 0/1 set, this would be really fast. :) /* Matthew N. Dodd | A memory retaining a love you had for life winter@jurai.net | As cruel as it seems nothing ever seems to http://www.jurai.net/~winter | go right - FLA M 3.1:53 */