From owner-freebsd-questions@FreeBSD.ORG Tue Mar 4 04:20:35 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 0E7AAC7 for ; Tue, 4 Mar 2014 04:20:35 +0000 (UTC) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2lp0242.outbound.protection.outlook.com [207.46.163.242]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id C527ABDA for ; Tue, 4 Mar 2014 04:20:34 +0000 (UTC) Received: from BL2PRD0310HT005.namprd03.prod.outlook.com (10.255.97.40) by BL2PR03MB258.namprd03.prod.outlook.com (10.255.231.16) with Microsoft SMTP Server (TLS) id 15.0.888.9; Tue, 4 Mar 2014 04:20:25 +0000 Received: from [10.0.0.66] (98.240.141.71) by pod51008.outlook.com (10.255.97.40) with Microsoft SMTP Server (TLS) id 14.16.423.0; Tue, 4 Mar 2014 04:20:24 +0000 Message-ID: <53155486.2060300@my.hennepintech.edu> Date: Mon, 3 Mar 2014 22:20:22 -0600 From: Andrew Berg User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Subject: Re: ZFS, GPTIDs, and using the whole disk References: In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [98.240.141.71] X-Forefront-PRVS: 01401330D1 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10009001)(6009001)(428001)(51704005)(24454002)(40224001)(199002)(189002)(63696002)(79102001)(66066001)(50466002)(75432001)(76482001)(47776003)(56816005)(90146001)(93516002)(74366001)(74706001)(93136001)(51856001)(53806001)(94946001)(65806001)(54356001)(59896001)(56776001)(92726001)(74876001)(47446002)(74502001)(64126003)(94316002)(31966008)(65956001)(83506001)(95416001)(59766001)(46102001)(80022001)(74662001)(81342001)(85306002)(87936001)(92566001)(76796001)(83072002)(49866001)(47736001)(76786001)(81686001)(80976001)(54316002)(86362001)(81542001)(85852003)(95666003)(4396001)(47976001)(50986001)(81816001)(23676002)(83322001)(69226001); DIR:OUT; SFP:1101; SCL:1; SRVR:BL2PR03MB258; H:BL2PRD0310HT005.namprd03.prod.outlook.com; CLIP:98.240.141.71; FPR:FE67F0D4.1DF05359.31DE3570.4EA95D79.201FF; MLV:sfv; PTR:InfoNoRecords; A:0; MX:1; LANG:en; Received-SPF: None (: my.HennepinTech.edu does not designate permitted sender hosts) X-OriginatorOrg: my.hennepintech.edu X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Mar 2014 04:20:35 -0000 On 2014.03.03 17:47, Chris Stankevitz wrote: > Please identify any false statements: > > 1. ZFS prefers to use the entire disk. Prefers, maybe, but it is not a big deal on FreeBSD as has already been explained. > 4. Because of (3) it is dangerous to use device names when building a zpool You would just need to be careful *at pool creation time* that you are using the correct block devices. You can swap them around all you like afterward since ZFS doesn't use device names to find block devices belonging to a pool. > 7. You can create a zpool of GPTIDs You can refer to block devices by GPT labels when creating a pool. I'm not sure if that's what you meant. I personally use GPT labels with each disk in my main pool having one partition for its entire space. Without GPT labels, the only reliable to distinguish between each disk is its serial number (they are all 3TB WD Reds), which would not be fun to use if one of them suddenly dies.