From owner-freebsd-stable@FreeBSD.ORG Tue Jan 11 03:38:16 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EA854106566B for ; Tue, 11 Jan 2011 03:38:15 +0000 (UTC) (envelope-from dan@langille.org) Received: from nyi.unixathome.org (nyi.unixathome.org [64.147.113.42]) by mx1.freebsd.org (Postfix) with ESMTP id BF9C58FC14 for ; Tue, 11 Jan 2011 03:38:15 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by nyi.unixathome.org (Postfix) with ESMTP id E630A508AC; Tue, 11 Jan 2011 03:38:14 +0000 (GMT) X-Virus-Scanned: amavisd-new at unixathome.org Received: from nyi.unixathome.org ([127.0.0.1]) by localhost (nyi.unixathome.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eVrIKNIJwo3d; Tue, 11 Jan 2011 03:38:14 +0000 (GMT) Received: from smtp-auth.unixathome.org (smtp-auth.unixathome.org [10.4.7.7]) (Authenticated sender: hidden) by nyi.unixathome.org (Postfix) with ESMTPSA id 6864F50852 ; Tue, 11 Jan 2011 03:38:14 +0000 (GMT) Message-ID: <4D2BD0A7.9060003@langille.org> Date: Mon, 10 Jan 2011 22:38:15 -0500 From: Dan Langille Organization: The FreeBSD Diary User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: John Hawkes-Reed References: <4D228F41.7040403@langille.org> <4D23504D.8060103@libeljournal.com> In-Reply-To: <4D23504D.8060103@libeljournal.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-stable Subject: Re: ZFS - hot spares : automatic or not? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Jan 2011 03:38:16 -0000 On 1/4/2011 11:52 AM, John Hawkes-Reed wrote: > On 04/01/2011 03:08, Dan Langille wrote: >> Hello folks, >> >> I'm trying to discover if ZFS under FreeBSD will automatically pull in a >> hot spare if one is required. >> >> This raised the issue back in March 2010, and refers to a PR opened in >> May 2009 >> >> * http://lists.freebsd.org/pipermail/freebsd-fs/2010-March/007943.html >> * http://www.freebsd.org/cgi/query-pr.cgi?pr=134491 >> >> In turn, the PR refers to this March 2010 post referring to using devd >> to accomplish this task. >> >> http://lists.freebsd.org/pipermail/freebsd-stable/2010-March/055686.html >> >> Does the above represent the the current state? >> >> I ask because I just ordered two more HDD to use as spares. Whether they >> sit on the shelf or in the box is open to discussion. > > As far as our testing could discover, it's not automatic. > > I wrote some Ugly Perl that's called by devd when it spots a drive-fail > event, which seemed to DTRT when simulating a failure by pulling a drive. Without such a script, what is the value in creating hot spares? -- Dan Langille - http://langille.org/