From owner-freebsd-questions@FreeBSD.ORG Wed Oct 19 14:56:04 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 5886D1065672 for ; Wed, 19 Oct 2011 14:56:04 +0000 (UTC) (envelope-from fajar@fajar.net) Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by mx1.freebsd.org (Postfix) with ESMTP id 2DC148FC1C for ; Wed, 19 Oct 2011 14:56:03 +0000 (UTC) Received: by iaky10 with SMTP id y10so2669785iak.13 for ; Wed, 19 Oct 2011 07:56:03 -0700 (PDT) MIME-Version: 1.0 Received: by 10.42.154.201 with SMTP id r9mr12710075icw.14.1319034631791; Wed, 19 Oct 2011 07:30:31 -0700 (PDT) Received: by 10.42.241.2 with HTTP; Wed, 19 Oct 2011 07:30:31 -0700 (PDT) In-Reply-To: <20111019141443.GQ4592@pcjas.obspm.fr> References: <20111019141443.GQ4592@pcjas.obspm.fr> Date: Wed, 19 Oct 2011 21:30:31 +0700 Message-ID: From: "Fajar A. Nugraha" To: Albert Shih Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: zfs-discuss@opensolaris.org, freebsd-questions@freebsd.org Subject: Re: [zfs-discuss] 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 14:56:04 -0000 On Wed, Oct 19, 2011 at 9:14 PM, Albert Shih wrote: > Hi > > Sorry to cross-posting. I don't knwon which mailing-list I should post th= is > 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 ha= ve > two options : > > =A0 =A0 =A0 =A01/ create a LV on the PERC H800 so the server see one volu= me and put > =A0 =A0 =A0 =A0the zpool on this unique volume and let the hardware manag= e the > =A0 =A0 =A0 =A0raid. > > =A0 =A0 =A0 =A02/ create 12 LV on the perc H800 (so without raid) and let= FreeBSD > =A0 =A0 =A0 =A0and ZFS manage the raid. > > which one is the best solution ? Neither. The best solution is to find a controller which can pass the disk as JBOD (not encapsulated as virtual disk). Failing that, I'd go with (1) (though others might disagree). > > Any advise about the RAM I need on the server (actually one MD1200 so 12x= 2To disk) The more the better :) Just make sure do NOT use dedup untul you REALLY know what you're doing (which usually means buying lots of RAM and SSD for L2ARC). --=20 Fajar