From owner-freebsd-current@FreeBSD.ORG  Sun Jun 14 00:56:22 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0DC141065670
	for <freebsd-current@freebsd.org>; Sun, 14 Jun 2009 00:56:22 +0000 (UTC)
	(envelope-from james-freebsd-current@jrv.org)
Received: from mail.jrv.org (rrcs-24-73-246-106.sw.biz.rr.com [24.73.246.106])
	by mx1.freebsd.org (Postfix) with ESMTP id C55238FC1B
	for <freebsd-current@freebsd.org>; Sun, 14 Jun 2009 00:56:21 +0000 (UTC)
	(envelope-from james-freebsd-current@jrv.org)
Received: from kremvax.housenet.jrv (kremvax.housenet.jrv [192.168.3.124])
	by mail.jrv.org (8.14.3/8.14.3) with ESMTP id n5E0uKkJ009823;
	Sat, 13 Jun 2009 19:56:20 -0500 (CDT)
	(envelope-from james-freebsd-current@jrv.org)
Authentication-Results: mail.jrv.org; domainkeys=pass (testing)
	header.from=james-freebsd-current@jrv.org
DomainKey-Signature: a=rsa-sha1; s=enigma; d=jrv.org; c=nofws; q=dns;
	h=message-id:date:from:user-agent:mime-version:cc:subject:
	references:in-reply-to:content-type:content-transfer-encoding;
	b=kj75XokHCPL69Sir7o/PzIvyp8cdTHitDcmr9yGSIxPhC8Rvwr3yBGQY6cSj+Kuur
	T9/hPdzDju6ooHpP7XWKF26VnAs7qTC8FEk86qowK/mEw9BoMiI6s2E9B3SlBsgRGxI
	H4DSGW70OLK7AzN/mBKJv8nggMgWZGcCQdii32w=
Message-ID: <4A344A9F.5020708@jrv.org>
Date: Sat, 13 Jun 2009 19:55:59 -0500
From: "James R. Van Artsdalen" <james-freebsd-current@jrv.org>
User-Agent: Thunderbird 2.0.0.21 (Macintosh/20090302)
MIME-Version: 1.0
References: <permail-200906131853081e86ffa80000190b-a_best01@message-id.uni-muenster.de>
	<A7C988A9-DCFD-422B-B39D-B912FECEFD0D@mac.com>
In-Reply-To: <A7C988A9-DCFD-422B-B39D-B912FECEFD0D@mac.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: Alexander Best <alexbestms@math.uni-muenster.de>,
	FreeBSD Current <freebsd-current@freebsd.org>,
	Marcel Moolenaar <xcllnt@mac.com>
Subject: Re: `gpart show` and secondary GPT header
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 14 Jun 2009 00:56:22 -0000

Marcel Moolenaar wrote:
> In any case: the primary and secondary GPT headers
> and tables are in fact on the disk. They're there,
> trust me :-)

Unless you're using a Silicon Image 3124 controller :-(

FYI - the option ROM on this card appears to clobber the secondary GPT
table.  Moving disks to a 3124 results in this:

Jun 13 06:31:42 bigback kernel: GEOM: ad4: the secondary GPT table is
corrupt or invalid.
Jun 13 06:31:42 bigback kernel: GEOM: ad4: using the primary only --
recovery suggested.
Jun 13 06:31:42 bigback kernel: GEOM: ad12: the secondary GPT table is
corrupt or invalid.
Jun 13 06:31:42 bigback kernel: GEOM: ad12: using the primary only --
recovery suggested.

Not our fault  - just thought I'd mention it in case it comes up again,
or if someone searches for that error message.

PS. The man page might make a mention of what "recovery" is if there's
some way other than dd(1) to do it.