From owner-freebsd-questions@FreeBSD.ORG Wed Oct 19 14:40:51 2011 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 E925D10656A5 for ; Wed, 19 Oct 2011 14:40:51 +0000 (UTC) (envelope-from ml@my.gd) Received: from mail-ww0-f42.google.com (mail-ww0-f42.google.com [74.125.82.42]) by mx1.freebsd.org (Postfix) with ESMTP id 7E84D8FC17 for ; Wed, 19 Oct 2011 14:40:50 +0000 (UTC) Received: by wwn22 with SMTP id 22so6455066wwn.1 for ; Wed, 19 Oct 2011 07:40:50 -0700 (PDT) Received: by 10.227.53.195 with SMTP id n3mr1540235wbg.77.1319035250005; Wed, 19 Oct 2011 07:40:50 -0700 (PDT) Received: from dfleuriot-at-hi-media.com ([83.167.62.196]) by mx.google.com with ESMTPS id i29sm10168820wbp.22.2011.10.19.07.40.47 (version=SSLv3 cipher=OTHER); Wed, 19 Oct 2011 07:40:47 -0700 (PDT) Message-ID: <4E9EE16E.30507@my.gd> Date: Wed, 19 Oct 2011 16:40:46 +0200 From: Damien Fleuriot User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <20111019141443.GQ4592@pcjas.obspm.fr> In-Reply-To: <20111019141443.GQ4592@pcjas.obspm.fr> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: ZFS on Dell with FreeBSD 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: Wed, 19 Oct 2011 14:40:52 -0000 On 10/19/11 4:14 PM, Albert Shih wrote: > Hi > > Sorry to cross-posting. I don't knwon which mailing-list I should post this > message. > > I'll would like to use FreeBSD with ZFS on some Dell server with some > MD1200 (classique DAS). > > When we buy a MD1200 we need a RAID PERC H800 card on the server so we have > two options : > > 1/ create a LV on the PERC H800 so the server see one volume and put > the zpool on this unique volume and let the hardware manage the > raid. > > 2/ create 12 LV on the perc H800 (so without raid) and let FreeBSD > and ZFS manage the raid. > > which one is the best solution ? > > Any advise about the RAM I need on the server (actually one MD1200 so 12x2To disk) > > Regards. > > JAS Why would you post about freebsd on opensolaris' list is beyond me. Regarding your options with the ZFS pool, you will want to set your disks as JBOD, so you can aggregate them with ZFS and use its native features (including the self healing). If you setup a hardware RAID then create a ZFS pool off it, you'll miss on the self healing because ZFS will not see the individual drives. Regarding your RAM needs, you are providing too few information for an accurate answer. What will you use the server for ? Regarding the H800 card on freebsd, I would test it beforehand if I were you, there were problems getting the H200 working on 8.2 before.