From owner-freebsd-questions@FreeBSD.ORG Tue Nov 18 16:04:42 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 422019DA for ; Tue, 18 Nov 2014 16:04:42 +0000 (UTC) Received: from na01-bn1-obe.outbound.protection.outlook.com (mail-bn1bbn0109.outbound.protection.outlook.com [157.56.111.109]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "MSIT Machine Auth CA 2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D8590AA1 for ; Tue, 18 Nov 2014 16:04:40 +0000 (UTC) Received: from [10.0.0.21] (73.5.142.244) by BY1PR0301MB0838.namprd03.prod.outlook.com (25.160.193.144) with Microsoft SMTP Server (TLS) id 15.1.16.15; Tue, 18 Nov 2014 16:04:32 +0000 Message-ID: <546B6E0A.4020906@my.hennepintech.edu> Date: Tue, 18 Nov 2014 10:04:26 -0600 From: Andrew Berg User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Subject: Re: Hardware RAID or software for ZFS References: <7F1B1DC4-46CA-4B96-836B-2D2D494F60E8@todoo.biz> In-Reply-To: <7F1B1DC4-46CA-4B96-836B-2D2D494F60E8@todoo.biz> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [73.5.142.244] X-ClientProxiedBy: BL2PR08CA0051.namprd08.prod.outlook.com (10.255.170.169) To BY1PR0301MB0838.namprd03.prod.outlook.com (25.160.193.144) X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY1PR0301MB0838; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:; SRVR:BY1PR0301MB0838; X-Forefront-PRVS: 039975700A X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10019020)(6049001)(6009001)(199003)(51704005)(189002)(24454002)(99396003)(64126003)(4396001)(120916001)(110136001)(105586002)(107886001)(2351001)(106356001)(122386002)(107046002)(47776003)(75432002)(64706001)(95666004)(46102003)(83506001)(88552001)(62966003)(23676002)(21056001)(31966008)(77096003)(77156002)(65956001)(20776003)(40100003)(65806001)(59896002)(66066001)(450100001)(50986999)(65816999)(89122001)(54356999)(87976001)(97736003)(101416001)(33656002)(102836001)(87266999)(19580395003)(80316001)(76176999)(50466002)(19580405001)(42186005)(86362001)(92566001)(92726001)(89472002); DIR:OUT; SFP:1102; SCL:1; SRVR:BY1PR0301MB0838; H:[10.0.0.21]; FPR:; MLV:sfv; PTR:InfoNoRecords; A:0; MX:1; LANG:en; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:; SRVR:BY1PR0301MB0838; X-OriginatorOrg: my.hennepintech.edu X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Nov 2014 16:04:42 -0000 On 2014.11.18 09:28, bsd@todoo.biz wrote: > Hi, > > > I would need your help in order to figure out which will be the best in order to setup a server which will be used as a Poudriere server. > > My question is related to the usage of hardware RAID controller (JBOD) or software based controller (graid) Use neither. ZFS does its own RAID and it works much, much more efficiently if it doesn't have some other system below it lying about what is going on with the disks. At best, your other RAID solution will waste cycles, and at worst, ZFS will constantly try to fix all the changes that happen underneath and the two will constantly be fighting over what the correct state of the disks is. In that case, ZFS often loses and you will be unable to access your data because, as far as ZFS knows, gremlins are flipping bits at random and destroying your data.