From owner-freebsd-questions@FreeBSD.ORG  Tue Aug 12 15:26:18 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 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id CFE3ECA5
 for <freebsd-questions@freebsd.org>; Tue, 12 Aug 2014 15:26:18 +0000 (UTC)
Received: from wonkity.com (wonkity.com [67.158.26.137])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "wonkity.com", Issuer "wonkity.com" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 7EB922EEF
 for <freebsd-questions@freebsd.org>; Tue, 12 Aug 2014 15:26:18 +0000 (UTC)
Received: from wonkity.com (localhost [127.0.0.1])
 by wonkity.com (8.14.9/8.14.9) with ESMTP id s7CFQHa2023733
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);
 Tue, 12 Aug 2014 09:26:17 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Received: from localhost (wblock@localhost)
 by wonkity.com (8.14.9/8.14.9/Submit) with ESMTP id s7CFQGrw023730;
 Tue, 12 Aug 2014 09:26:17 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Date: Tue, 12 Aug 2014 09:26:16 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: RW <rwmaillists@googlemail.com>
Subject: Re: gpt label missing after adding gjournal
In-Reply-To: <20140812152345.2000766b@gumby.homeunix.com>
Message-ID: <alpine.BSF.2.11.1408120924370.22786@wonkity.com>
References: <20140812131123.5a0f79fb@gumby.homeunix.com>
 <alpine.BSF.2.11.1408120749190.83078@wonkity.com>
 <20140812152345.2000766b@gumby.homeunix.com>
User-Agent: Alpine 2.11 (BSF 23 2013-08-11)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3
 (wonkity.com [127.0.0.1]); Tue, 12 Aug 2014 09:26:17 -0600 (MDT)
Cc: freebsd-questions@freebsd.org
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.18
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: Tue, 12 Aug 2014 15:26:18 -0000

On Tue, 12 Aug 2014, RW wrote:

> On Tue, 12 Aug 2014 08:00:34 -0600 (MDT)
> Warren Block wrote:
>
>> On Tue, 12 Aug 2014, RW wrote:
>>
>>>
>>>
>
>>> and then I created gp0home.journal and  gp0rest.eli.journal
>>>
>>> when I rebooted gp0home was missing from /dev/gpt
>>>
>>> $ ls  /dev/gpt
>>> gp0boot gp0rest gp0root gp0swap gp0usr  gp0var
>>>
>>> The gjournal partition is recognized as
>>> /dev/ada1p6.journal and can be mounted, but I can't mount it with
>>> the gpt label.
>>>
>>> Anyone know what's going on?
>>
>> Mounting a device, or that device being used by another device, can
>> cause the labels to be hidden.
>
> The label is missing at boot time. I only mounted  /dev/ada1p6.journal
> once just to check it worked - nothing changed when I unmounted it.

Well, the gjournal metadata is still present on that partition.  If the 
gjournal kernel module is loaded, it will automount.  (I think, I have 
not used gjournal.)

So maybe 'gjournal stop ada1p6.journal'.