From owner-freebsd-stable@FreeBSD.ORG  Fri Jul 23 01:23:07 2010
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
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 0E9D51065677
	for <freebsd-stable@freebsd.org>; Fri, 23 Jul 2010 01:23:07 +0000 (UTC)
	(envelope-from ptyll@nitronet.pl)
Received: from mail.nitronet.pl (pop3.nitronet.pl [195.90.106.28])
	by mx1.freebsd.org (Postfix) with ESMTP id C0BFB8FC17
	for <freebsd-stable@freebsd.org>; Fri, 23 Jul 2010 01:23:06 +0000 (UTC)
Received: from mailnull by mail.nitronet.pl with virscan (Exim 4.72 (FreeBSD))
	(envelope-from <ptyll@nitronet.pl>) id 1Oc6yf-000KxW-8k
	for freebsd-stable@freebsd.org; Fri, 23 Jul 2010 03:23:05 +0200
Date: Fri, 23 Jul 2010 03:22:59 +0200
From: Pawel Tyll <ptyll@nitronet.pl>
X-Priority: 3 (Normal)
Message-ID: <718046944.20100723032259@nitronet.pl>
To: Dan Langille <dan@langille.org>
In-Reply-To: <4C48E695.6030602@langille.org>
References: <4C47B57F.5020309@langille.org> <4C48E695.6030602@langille.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Virus-Scanned: Nitronet.pl
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: ptyll@nitronet.pl
X-SA-Exim-Scanned: No (on mail.nitronet.pl); SAEximRunCond expanded to false
Cc: freebsd-stable@freebsd.org
Subject: Re: Using GTP and glabel for ZFS arrays
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Jul 2010 01:23:07 -0000

> I do not think I can adjust the existing zpool on the fly.  I think I
> need to copy everything elsewhere (i.e the 2 empty drives).  Then start
> the new zpool from scratch.
You can, and you should (for educational purposes if not for fun :>),
unless you wish to change raidz1 to raidz2. Replace, wait for
resilver, if redoing used disk then offline it, wipe magic with dd
(16KB at the beginning and end of disk/partition will do), carry on
with GPT, rinse and repeat with next disk. When last vdev's replace
finishes, your pool will grow automagically.