From owner-freebsd-stable Wed Nov 14 14: 7:39 2001 Delivered-To: freebsd-stable@freebsd.org Received: from smtp.wanadoo.nl (smtp1.wanadoo.nl [194.134.35.136]) by hub.freebsd.org (Postfix) with ESMTP id 7CD4037B405 for ; Wed, 14 Nov 2001 14:07:34 -0800 (PST) Received: from ams-gw.sohara.org (p516.vcu.wanadoo.nl [194.134.201.80]) by smtp.wanadoo.nl (8.11.3/8.11.3) with SMTP id fAEM7DV21392; Wed, 14 Nov 2001 23:07:15 +0100 (MET) Date: Wed, 14 Nov 2001 23:07:08 +0100 From: "Steve O'Hara-Smith" To: bv@wjv.com Cc: damascus@home.com, stable@FreeBSD.ORG Subject: Re: ATA hard drives Message-Id: <20011114230708.3ceb579d.steve@sohara.org> In-Reply-To: <20011114095048.A14300@wjv.com> References: <20011114051132.A12369@wjv.com> <5.1.0.14.2.20011114091338.03464ec0@netmail.home.com> <20011114095048.A14300@wjv.com> X-Mailer: Sylpheed version 0.6.5 (GTK+ 1.2.10; i386--freebsd4.4) X-Face: %]+HVL}K`P8>+8ZcY-WGHP6j@&mxMo9JH6_WdgIgUGH)JX/usO0%jy7T~IVgqjumD^OBqX,Kv^-GM6mlw(fI^$"QRKyZ$?xx/ Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, 14 Nov 2001 09:50:48 -0500 Bill Vermillion wrote: > Not neccesarily true. About 3-4 years ago I was researching drives > and found the IBM 5400RPM SCSI drives were faster than the SEAGATE > Baracudda 7200RPM drives. This was because the IBM's were using a > new head design. Improved media can also mean that you can write So the IBMs had a higher capacity or fewer platters at higher density. Head design alone doesn't help unless it translates to more bits per inch of track or more tracks per inch or both. It seems likely that the 160Gb Maxtor 5400 RPM could have a faster data rate than a 7200 RPM 80Gb unless the Maxtor has rather more platters than the typical 7200 RPM 80Gb. Disc performance is a complex thing depending on rotational speed, linear bit density, track density, head movement speed, head settling time, soft error rate, pattern of use and probably a few other things. -- C:>WIN | Directable Mirrors The computer obeys and wins. |A Better Way To Focus The Sun You lose and Bill collects. | licenses available - see: | http://www.sohara.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message