From owner-freebsd-questions@FreeBSD.ORG Sat May 18 07:37:25 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 03F50B84 for ; Sat, 18 May 2013 07:37:25 +0000 (UTC) (envelope-from Ivailo.Tanusheff@skrill.com) Received: from va3outboundpool.messaging.microsoft.com (va3ehsobe002.messaging.microsoft.com [216.32.180.12]) by mx1.freebsd.org (Postfix) with ESMTP id A2021650 for ; Sat, 18 May 2013 07:37:24 +0000 (UTC) Received: from mail60-va3-R.bigfish.com (10.7.14.239) by VA3EHSOBE007.bigfish.com (10.7.40.11) with Microsoft SMTP Server id 14.1.225.23; Sat, 18 May 2013 07:22:15 +0000 Received: from mail60-va3 (localhost [127.0.0.1]) by mail60-va3-R.bigfish.com (Postfix) with ESMTP id B66BF4202CD; Sat, 18 May 2013 07:22:14 +0000 (UTC) X-Forefront-Antispam-Report: CIP:157.56.249.213; KIP:(null); UIP:(null); IPV:NLI; H:AM2PRD0710HT002.eurprd07.prod.outlook.com; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: PS0(zz9371I542Izz1f42h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1fc6hzz8275fh8275dhz2fh2a8h668h839h944hd24hf0ah1220h1288h12a5h12a9h12bdh137ah13b6h1441h1504h1537h153bh162dh1631h1758h18e1h1946h19b5h19ceh1ad9h1b0ah1d07h1d0ch1d2eh1d3fh9a9j1155h) Received-SPF: pass (mail60-va3: domain of skrill.com designates 157.56.249.213 as permitted sender) client-ip=157.56.249.213; envelope-from=Ivailo.Tanusheff@skrill.com; helo=AM2PRD0710HT002.eurprd07.prod.outlook.com ; .outlook.com ; X-Forefront-Antispam-Report-Untrusted: SFV:SKI; SFS:; DIR:OUT; SFP:; SCL:-1; SRVR:DB3PR07MB059; H:DB3PR07MB059.eurprd07.prod.outlook.com; LANG:en; Received: from mail60-va3 (localhost.localdomain [127.0.0.1]) by mail60-va3 (MessageSwitch) id 1368861732380509_23399; Sat, 18 May 2013 07:22:12 +0000 (UTC) Received: from VA3EHSMHS020.bigfish.com (unknown [10.7.14.238]) by mail60-va3.bigfish.com (Postfix) with ESMTP id 3AC2B40070; Sat, 18 May 2013 07:22:12 +0000 (UTC) Received: from AM2PRD0710HT002.eurprd07.prod.outlook.com (157.56.249.213) by VA3EHSMHS020.bigfish.com (10.7.99.30) with Microsoft SMTP Server (TLS) id 14.1.225.23; Sat, 18 May 2013 07:22:11 +0000 Received: from DB3PR07MB059.eurprd07.prod.outlook.com (10.242.137.149) by AM2PRD0710HT002.eurprd07.prod.outlook.com (10.255.165.37) with Microsoft SMTP Server (TLS) id 14.16.311.1; Sat, 18 May 2013 07:21:49 +0000 Received: from DB3PR07MB059.eurprd07.prod.outlook.com (10.242.137.149) by DB3PR07MB059.eurprd07.prod.outlook.com (10.242.137.149) with Microsoft SMTP Server (TLS) id 15.0.698.13; Sat, 18 May 2013 07:21:48 +0000 Received: from DB3PR07MB059.eurprd07.prod.outlook.com ([169.254.2.144]) by DB3PR07MB059.eurprd07.prod.outlook.com ([169.254.2.144]) with mapi id 15.00.0698.010; Sat, 18 May 2013 07:21:48 +0000 From: Ivailo Tanusheff To: "bsd@todoo.biz" , Liste FreeBSD Subject: RE: ZFS install on a partition Thread-Topic: ZFS install on a partition Thread-Index: AQHOU01bsoTCuF7L+0CRx2p5cPppmJkKhktw Date: Sat, 18 May 2013 07:21:47 +0000 Message-ID: <372082cab2064846809615a8073e022c@DB3PR07MB059.eurprd07.prod.outlook.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [217.18.249.148] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: skrill.com X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 May 2013 07:37:25 -0000 Hi, If you use HBA/JBOD then you will rely on the software RAID of the ZFS syst= em. Yes, this RAID is good, but unless you use SSD disks to boost performan= ce and a lot of RAM the hardware raid should be more reliable and mush fast= er. I didn't get if you want to use the system to dual boot Linux/FreeBSD or ju= st to share FreeBSD space with linux. But I would advise you to go with option 1 - you will get most of the syste= m and obviously you don't need zpool with raid, as your LSI controller will= do all the redundancy for you. Making software RAID over the hardware one = will only decrease performance and will NOT increase the reliability, as yo= u will not be sure which information is stored on which physical disk. If stability is a MUST, then I will also advise you to go with bunch of poo= ls and a disk designated as hot spare - in case some disk dies you will rel= y on the automation recovery. Also you should run monitoring tool on your r= aid controller. You can also set copies=3D2/3 just in case some errors occur, so ZFS can au= to0repair the data. if you run ZFS over several LUNs this will make even mo= re sense.=20 Best regards, Ivailo Tanusheff -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@f= reebsd.org] On Behalf Of bsd@todoo.biz Sent: Saturday, May 18, 2013 1:24 AM To: Liste FreeBSD Subject: ZFS install on a partition Hi,=20 I have a question regarding ZFS install on a system setup using an Intel Mo= dular.=20 This system runs various flavor of FreeBSD and Linux using a shared pool (L= UNs).=20 These LUNs have been configured in RAID 6 using the internal controller (LS= I logic).=20 So from the OS point of view there is just a volume available.=20 I know I should install a system using HBA and JBOD configuration - but unf= ortunately this is not an option for this server.=20 What would you advise ?=20 1. Can I use an existing partition and setup ZFS on this partition using a = standard Zpool (no RAID).=20 2. Should I use any other solution in order to setup this (like full ZFS in= stall on disk using the entire pool with ZFS).=20 3. Should I avoid using ZFS since my system is not well tuned and It would = be asking for trouble to use ZFS in these conditions.=20 P.S. Stability is a must for this system - so I won't die if you answer "3"= and tell me to keep on using UFS.=20 Thanks.=20