From owner-freebsd-questions@FreeBSD.ORG Wed Sep 24 11:37:49 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 ECE81F67 for ; Wed, 24 Sep 2014 11:37:49 +0000 (UTC) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0113.outbound.protection.outlook.com [207.46.100.113]) (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 B54CCC10 for ; Wed, 24 Sep 2014 11:37:48 +0000 (UTC) Received: from CY1PR0301MB0843.namprd03.prod.outlook.com (25.160.163.149) by CY1PR0301MB0873.namprd03.prod.outlook.com (25.160.164.16) with Microsoft SMTP Server (TLS) id 15.0.1034.13; Wed, 24 Sep 2014 11:37:41 +0000 Received: from [IPv6:2601:2:4780:2fd:3cfa:1b41:db29:34df] (2601:2:4780:2fd:3cfa:1b41:db29:34df) by CY1PR0301MB0843.namprd03.prod.outlook.com (25.160.163.149) with Microsoft SMTP Server (TLS) id 15.0.1034.13; Wed, 24 Sep 2014 11:37:38 +0000 Message-ID: <5422ACFA.3020503@my.hennepintech.edu> Date: Wed, 24 Sep 2014 06:37:30 -0500 From: Andrew Berg User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 MIME-Version: 1.0 To: Subject: Re: ZFS and 2 TB disk drive technology :-( References: <201409241108.s8OB85mY021922@sdf.org> In-Reply-To: <201409241108.s8OB85mY021922@sdf.org> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [2601:2:4780:2fd:3cfa:1b41:db29:34df] X-ClientProxiedBy: CO2PR06CA048.namprd06.prod.outlook.com (10.141.242.48) To CY1PR0301MB0843.namprd03.prod.outlook.com (25.160.163.149) X-Microsoft-Antispam: UriScan:;UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:CY1PR0301MB0843; X-Forefront-PRVS: 03449D5DD1 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(51874003)(24454002)(87266999)(86362001)(85852003)(75432002)(90102001)(47776003)(83072002)(20776003)(106356001)(88552001)(92566001)(92726001)(65816999)(85306004)(76176999)(64706001)(83506001)(50986999)(120916001)(99396003)(77096002)(54356999)(10300001)(65956001)(31966008)(76482002)(64126003)(65806001)(110136001)(87976001)(74662003)(97736003)(23676002)(83322001)(80022003)(33656002)(79102003)(50466002)(95666004)(2351001)(21056001)(42186005)(74502003)(80316001)(4396001)(77982003)(46102003)(59896002)(81542003)(107886001)(101416001)(107046002)(89122001)(105586002)(81342003)(3826002); DIR:OUT; SFP:1102; SCL:1; SRVR:CY1PR0301MB0843; H:[IPv6:2601:2:4780:2fd:3cfa:1b41:db29:34df]; FPR:; MLV:sfv; PTR:InfoNoRecords; MX:1; A:0; LANG:en; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:CY1PR0301MB0873; 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: Wed, 24 Sep 2014 11:37:50 -0000 On 2014.09.24 06:08, Scott Bennett wrote: > If anyone reading this has any suggestions for a course of action > here, I'd be most interested in reading them. Thanks in advance for any > ideas and also for any corrections if I've misunderstood what a ZFS > mirror was supposed to have done to preserve the data and maintain > correct operation at the application level. I skimmed over the long message, and my first thought is that you have a messed up controller that is lying. I've run into such a controller on a hard drive enclosure that is supposed to support disks larger than 2TB, but seems to write to who knows where when you want a sector beyond 2TB, and the filesystem layer has no idea anything is wrong. This is all just an educated, guess, but considering you get errors at a level below ZFS (would it be called the CAM layer?), my advice would be to check the controllers and perhaps even the disks themselves. AFAIK, issues at that layer are rarely software ones.