From owner-freebsd-questions@FreeBSD.ORG Mon May 18 20:37:41 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 1481F106566B for ; Mon, 18 May 2009 20:37:41 +0000 (UTC) (envelope-from glen.j.barber@gmail.com) Received: from mail-ew0-f159.google.com (mail-ew0-f159.google.com [209.85.219.159]) by mx1.freebsd.org (Postfix) with ESMTP id 9C2078FC0C for ; Mon, 18 May 2009 20:37:40 +0000 (UTC) (envelope-from glen.j.barber@gmail.com) Received: by ewy3 with SMTP id 3so4229043ewy.43 for ; Mon, 18 May 2009 13:37:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=I/f/Z7PM2EKHuHpiIlgIr9bzWp7hYvB7Y6HACExqiL8=; b=a0lqT7d1nHtaR7DdR7f8p76x4v223by5FFLBthA+Ox3mzQimErmpoeI3rEB7vUflxx 2tFcktt2abXcB6I+cAmA13bwZeaAUNHcMTiKzzCA2bnO4UgeJXWmkaTEwQPdAI/ueSOv C2bwYkXsDKOZslvXGirffXMBdCAvxPI/ZyEtA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=RzKkQQ391w718Izy855mLLQGrekN0yjVlgVDWjyimFBPoFOilCDHHIp86IWSKjffsM PQAih5NmEpYu/k2Edwxx/YjISR/K+d1ufDh4/Ty0VYFxJlMgRgskggZjfFPk5H9MdMfT aK94S7AWMDpNQD6h0hU7Rb4gzyROOCgufsHhM= MIME-Version: 1.0 Received: by 10.216.29.208 with SMTP id i58mr2316322wea.85.1242679059407; Mon, 18 May 2009 13:37:39 -0700 (PDT) In-Reply-To: <4A11C53C.3090008@rawbw.com> References: <4A00B3FA.5050905@rawbw.com> <4A11C53C.3090008@rawbw.com> Date: Mon, 18 May 2009 16:37:39 -0400 Message-ID: <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com> From: Glen Barber To: yuri@rawbw.com Content-Type: text/plain; charset=ISO-8859-1 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 List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 May 2009 20:37:41 -0000 Hi, Yuri On Mon, May 18, 2009 at 4:29 PM, Yuri wrote: > > So if I will put 6 hard drives with stripping each of them is 85MB/s (in the > beginning sectors) I will get 6X85MB/s=4.08Gb/s? > > Is it reasonable to expect this kind of speed? Something tells me that there > will be some other factors like bus speed that would potentially limit the > speed in such case. > 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). -- Glen Barber