From owner-freebsd-questions@FreeBSD.ORG  Wed Nov  5 09:25:26 2014
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id D65A481E
 for <freebsd-questions@freebsd.org>; Wed,  5 Nov 2014 09:25:26 +0000 (UTC)
Received: from blue.qeng-ho.org (blue.qeng-ho.org [217.155.128.241])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 4C962AD3
 for <freebsd-questions@freebsd.org>; Wed,  5 Nov 2014 09:25:25 +0000 (UTC)
Received: from arthur.home.qeng-ho.org (arthur.home.qeng-ho.org [172.23.1.2])
 by fileserver.home.qeng-ho.org (8.14.7/8.14.5) with ESMTP id
 sA596dU4001346
 for <freebsd-questions@freebsd.org>; Wed, 5 Nov 2014 09:06:40 GMT
 (envelope-from freebsd@qeng-ho.org)
Message-ID: <5459E89F.7080801@qeng-ho.org>
Date: Wed, 05 Nov 2014 09:06:39 +0000
From: Arthur Chance <freebsd@qeng-ho.org>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:31.0) Gecko/20100101 Thunderbird/31.2.0
MIME-Version: 1.0
To: freeBSD-Questions <freebsd-questions@freebsd.org>
Subject: zpool component names - gpt vs. gptid
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 05 Nov 2014 09:25:26 -0000

These days I use GPT labelled partitions (/dev/gpt/<label>) exclusively 
when creating zfs pools. However, on my latest box, where I have two 
pools each with a single component, "zpool status" lists the components 
as gptid/<uuid> rather than gpt/<label>

Is there any way to persuade zfs/zpool to use the GPT label devices 
rather than the gptid devices? Failing that, how do you map gptid's back 
to the underlying disk partitions? It's obvious in this case, but I'm 
building a new file server with eight identical disks in a raidz2 set up 
and am worried how I'll identify which disk has problems in the future.