From owner-freebsd-current@FreeBSD.ORG Mon Oct 25 23:05:32 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 58F0B16A4CE for ; Mon, 25 Oct 2004 23:05:32 +0000 (GMT) Received: from pi.codefab.com (pi.codefab.com [199.103.21.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id DF5A143D58 for ; Mon, 25 Oct 2004 23:05:31 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from [192.168.1.3] (pool-68-160-246-51.ny325.east.verizon.net [68.160.246.51]) by pi.codefab.com (8.12.11/8.12.11) with ESMTP id i9PN5OGH098239 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 25 Oct 2004 19:05:27 -0400 (EDT) Message-ID: <417D86AA.3060802@mac.com> Date: Mon, 25 Oct 2004 19:05:14 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Brad Knowles References: <14479.1098695558@critter.freebsd.dk> <417D25E8.6080804@ng.fadesa.es> <200410251928.01536.victor@alf.dyndns.ws> <"200410251837.58257.Thoma s.Sparrev ohn"@btinternet.com> <417D3F12.20302@DeepCore.dk> <417D40A1.9030802@ng.fadesa.es> <417D45F1.9090504@freebsd.org> <77F3FD4D-26BE-11D9-9A2F-003065ABFD92@mac.com> <417D65F1.2040809@freebsd.org> <417D6F4C.9000404@freebsd.org> <64029B30-26D2-11D9-9A2F-003065ABFD92@mac.com> In-Reply-To: X-Enigmail-Version: 0.86.1.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=-2.4 required=5.5 tests=AWL,BAYES_00 autolearn=ham version=2.64 X-Spam-Checker-Version: SpamAssassin 2.64 (2004-01-11) on pi.codefab.com cc: FreeBSD-CURRENT Mailing List Subject: Re: FreeBSD 5.3b7and poor ata performance X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Oct 2004 23:05:32 -0000 Brad Knowles wrote: > At 6:08 PM -0400 2004-10-25, Charles Swiger wrote: >> There's a Sun E450 with ten disks over 5 SCSI channels in the room >> next door: one UW channel native on the MB, and two U160 channels >> apiece from two dual-channel cards which come with each 8-drive-bay >> extender kit. > > You've got an average of two disks per SCSI channel, and how many > disks per channel on those 8-drive bays? The Sun E450 base unit came with a 4-drive bay and 1 channel. Sun sells (or sold?) kits that add 8-drive bays & a dual-channel card. You can put two kits in, for a total of twenty drives in the machine, in other words, so this particular system is only half-full. [ If it was full, there would be exactly 4 drives per channel. ] Hmm, here's a picture of an E450 with one 8-drive bay kit installed; you can see the two unused 80-pin SCA connectors where drives 10 and 11 [*] could go: http://sunsolve.sun.com/handbook_pub/Systems/E450/component.front_open_zoom.html >> It's running Solaris and DiskSuite (ODS) now, but it >> would be interesting to put FreeBSD on it and see how that does, if >> I ever get the chance. > > In my experience, ODS never performed quite as good as Vinum, but it > would be very interesting to see what kind of performance you can get > out of this box using FreeBSD/SPARC64. Yup. It would need to stop being used before I can play with it, though. -- -Chuck [*]: Counting from 0 to 19, of course.