From owner-freebsd-stable@FreeBSD.ORG Sun Apr 9 08:09:54 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8E5C016A464 for ; Sun, 9 Apr 2006 08:09:54 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail26.syd.optusnet.com.au (mail26.syd.optusnet.com.au [211.29.133.167]) by mx1.FreeBSD.org (Postfix) with ESMTP id D92FE43D45 for ; Sun, 9 Apr 2006 08:09:53 +0000 (GMT) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (c220-239-19-236.belrs4.nsw.optusnet.com.au [220.239.19.236]) by mail26.syd.optusnet.com.au (8.12.11/8.12.11) with ESMTP id k3989bro018660 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sun, 9 Apr 2006 18:09:40 +1000 Received: from turion.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by turion.vk2pj.dyndns.org (8.13.4/8.13.4) with ESMTP id k3989anN008867; Sun, 9 Apr 2006 18:09:37 +1000 (EST) (envelope-from peter@turion.vk2pj.dyndns.org) Received: (from peter@localhost) by turion.vk2pj.dyndns.org (8.13.4/8.13.4/Submit) id k3989Sh6008866; Sun, 9 Apr 2006 18:09:28 +1000 (EST) (envelope-from peter) Date: Sun, 9 Apr 2006 18:09:27 +1000 From: Peter Jeremy To: Scott Long Message-ID: <20060409080927.GC720@turion.vk2pj.dyndns.org> References: <20060406192950.GE700@turion.vk2pj.dyndns.org> <20060408203233.K67402@woozle.rinet.ru> <20060408212421.GB720@turion.vk2pj.dyndns.org> <20060408160304.ek1xxodrkok4gw4g@webmail.1command.com> <44384EB8.8090803@samsco.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <44384EB8.8090803@samsco.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.11 Cc: freebsd-stable@freebsd.org, "Chris H." Subject: Re: Pros and Cons of amd64 (versus i386). X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Apr 2006 08:09:54 -0000 On Sat, 2006-Apr-08 18:00:56 -0600, Scott Long wrote: >Modern disks (I don't know how to define a cutoff to this term, >unfortunately) I got my first ZBR (zone-block recording) Seagate SCSI disk at work about 20 years ago. I'm not sure when it became common. >other day. I'm still not clear on whether the drive starts recording >at the outer rim or the inner rim of the disk, and that could very well >different between manufacturers. Traditionaly hard disks have cylnder 0 at the outside. It's possible that some manufacturers may have swapped this. Note that CDs and DVD have block 0 at the inside and so the best I/O performance is usually at the end of the disk. > The only way to get a 'fair' comparison is to use >separate identical disks with identical partition layouts for each >of your OS installs. If disk I/O is an issue, maybe even newfs the partitions for each test. -- Peter Jeremy