From owner-freebsd-questions@FreeBSD.ORG Tue May 19 03:07:20 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 42D061065673 for ; Tue, 19 May 2009 03:07:20 +0000 (UTC) (envelope-from yuri@rawbw.com) Received: from shell.rawbw.com (shell.rawbw.com [198.144.192.42]) by mx1.freebsd.org (Postfix) with ESMTP id 2B8318FC17 for ; Tue, 19 May 2009 03:07:20 +0000 (UTC) (envelope-from yuri@rawbw.com) Received: from eagle.syrec.org (ppp-71-139-35-171.dsl.snfc21.pacbell.net [71.139.35.171]) (authenticated bits=0) by shell.rawbw.com (8.13.6/8.13.6) with ESMTP id n4J37JH7060408; Mon, 18 May 2009 20:07:19 -0700 (PDT) Message-ID: <4A12225E.6000900@rawbw.com> Date: Mon, 18 May 2009 20:07:10 -0700 From: Yuri User-Agent: Thunderbird 2.0.0.21 (X11/20090419) MIME-Version: 1.0 To: Glen Barber References: <4A00B3FA.5050905@rawbw.com> <4A11C53C.3090008@rawbw.com> <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com> In-Reply-To: <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: yuri@rawbw.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 May 2009 03:07:20 -0000 Glen Barber wrote: > No, that is not reasonable (but in a perfect world, would be correct). > > You are limited by the bus speed and controller buffer speed > (whichever is slower). > My motherboard has PCI Express v2.0, that is 500MB/s limitation. Also it has HD/RAID controller Intel ICH10R Southbidge that has peak SATA Data Rate 300MB/s. So this brings me to 300MB/s limit. So 3X harddrives at 85MB/s will still scale. And 4X will already show the limitation. Yuri