From owner-freebsd-stable@FreeBSD.ORG Fri Sep 11 19:17:01 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9D823106568D for ; Fri, 11 Sep 2009 19:17:01 +0000 (UTC) (envelope-from artis.caune@gmail.com) Received: from mail-fx0-f210.google.com (mail-fx0-f210.google.com [209.85.220.210]) by mx1.freebsd.org (Postfix) with ESMTP id 325F58FC0A for ; Fri, 11 Sep 2009 19:17:01 +0000 (UTC) Received: by fxm6 with SMTP id 6so966649fxm.43 for ; Fri, 11 Sep 2009 12:17:00 -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; bh=ayZqT+Sp7YPnKaj1YFLdMk/3cPdnHideqmTW4zdIC0s=; b=cyoA9PqmzbHE1XQFTNbve6xxwBxKIkiyB/xClOb5gZQTlTERi4es00REZ1bqX2mWJK UomJy7XurOEXBmrBONYFYW1qrqDXFJAl0ksquEN7vxqmk03fiYj9sAnOVB57B0C+HDNs YrQQ+YG5i/qgCaAAiEWRjE5go43tgfAmj9IVE= 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; b=I1AjC36R+iN3J42cREvrNAt2CZEIQMIr0JpJo+88PUvfodhmYcjLOh9IMLQx8elxi1 CjwhZTcdfCmXa4V/smAevarMJ7kbhcZi5PvQN3/sKYENPPxN72x9jF57Vz9fnFtGvDZW OYjs5R58WopM6/A+jjF76rViSw1UZqkZLOjpY= MIME-Version: 1.0 Received: by 10.103.50.28 with SMTP id c28mr1608405muk.17.1252696620220; Fri, 11 Sep 2009 12:17:00 -0700 (PDT) In-Reply-To: <4AAA741A.7040105@eng.auth.gr> References: <4AA90D88.4010004@eng.auth.gr> <9e20d71e0909110601kaa87f2em2e4e618b8feb306b@mail.gmail.com> <4AAA741A.7040105@eng.auth.gr> Date: Fri, 11 Sep 2009 22:17:00 +0300 Message-ID: <9e20d71e0909111217v6242c8f1ge391d72f00193344@mail.gmail.com> From: Artis Caune To: George Mamalakis Content-Type: text/plain; charset=UTF-8 Cc: freebsd-stable@freebsd.org Subject: Re: FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues 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: Fri, 11 Sep 2009 19:17:01 -0000 2009/9/11 George Mamalakis : > Artis, and the rest of the guys, thank you all for your answers. > > Ivan, I was thinking of using one of the techniques you mention (create two > volumes, install fbsd on one of them, and use GTP on the second drive), but > I was wondering if there would be any "incompatibility" issues with tools > like df, etc. > > > In case I do this (since I only have sata drives), will I end up with > degraded disk performance? Theoretically I assume not, since 1.5 Gbps is > adequate for *each* disk (it calculates to something like ~178MBps); but > have you tried it on your disks, and everything works OK since (along with > performance)? > We didn't tested speed much, but looks like you loose few MB (very quick tests with dd). We are hosting 40K+ mailboxes, on ZFS :), so we are more random-read/seek bound than Gbps bound. But yes, we are running at 1.5Gbps and are happy stable/7 ZFS v6 users and after few weeks we are migrating to stable/8 ZFS v13 with GPT and gptzfsboot. -- Artis Caune Everything should be made as simple as possible, but not simpler.