From owner-freebsd-fs@FreeBSD.ORG Wed May 2 23:24:29 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D014F106564A for ; Wed, 2 May 2012 23:24:29 +0000 (UTC) (envelope-from daryl@isletech.net) Received: from lagoon.isletech.net (lagoon.isletech.net [64.235.98.66]) by mx1.freebsd.org (Postfix) with ESMTP id 9E8A98FC17 for ; Wed, 2 May 2012 23:24:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=isletech.net; s=isle; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:References:Subject:To:MIME-Version:From:Date:Message-ID; bh=+fieIefAd6G7mugpGnm310j/ZRPZOMWI1h9wgypdgUg=; b=mOBcR6StZKqScwqqYnqJeg/YR/Itv0Ct1IBf6qEW8+vTSGNEWJOm+r492pNSP3uPMLg5GHH3PqdnKh/Ky/rKNQ==; Received: from 24-212-254-9.cable.teksavvy.com ([24.212.254.9]:51563 helo=mac.home.isletech.net) by lagoon.isletech.net with esmtpsa (TLSv1:DHE-RSA-CAMELLIA256-SHA:256) (Exim 4.77 (FreeBSD)) (envelope-from ) id 1SPidM-0009lH-Vw for freebsd-fs@freebsd.org; Wed, 02 May 2012 19:06:57 -0400 Message-ID: <4FA1BE10.3010200@isletech.net> Date: Wed, 02 May 2012 19:06:56 -0400 From: Daryl Richards User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: freebsd-fs@freebsd.org References: <20120502223414.EC0E71065670@hub.freebsd.org> In-Reply-To: <20120502223414.EC0E71065670@hub.freebsd.org> X-Enigmail-Version: 1.4.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: Replacing dead drives in ZRAID2 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 May 2012 23:24:29 -0000 On 12-05-02 6:34 PM, Simon wrote: > Thank you Mark, that's what I thought, too. My major concern is the failure > of drives, not so much the hot-swapping. I can live with taking the machine > offline, replacing the drive(s), and booting up. Yanking the drives out from live > system is the only way I can simulate a hard failure. Without this working, I > cannot be sure the system will remain running should a drive go bad. I'm > not sure how the system would handle this given ahd cannot handle pulling > of hot drives out. I will try to get in touch with the driver maintainer. > > Thanks again! > -Simon One way to simulate a "failure" with ZFS is to use dd to write trash data to the underlying drive, and then scrub it to detect the errors and have it correct itself. -- Daryl Richards Isle Technical Services Inc.