From owner-freebsd-questions@FreeBSD.ORG  Sat Oct 27 23:01:29 2012
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 1867FAE5
 for <freebsd-questions@freebsd.org>; Sat, 27 Oct 2012 23:01:29 +0000 (UTC)
 (envelope-from wblock@wonkity.com)
Received: from wonkity.com (wonkity.com [67.158.26.137])
 by mx1.freebsd.org (Postfix) with ESMTP id C15878FC12
 for <freebsd-questions@freebsd.org>; Sat, 27 Oct 2012 23:01:28 +0000 (UTC)
Received: from wonkity.com (localhost [127.0.0.1])
 by wonkity.com (8.14.5/8.14.5) with ESMTP id q9RN1RZ3070470;
 Sat, 27 Oct 2012 17:01:27 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Received: from localhost (wblock@localhost)
 by wonkity.com (8.14.5/8.14.5/Submit) with ESMTP id q9RN1Rfg070467;
 Sat, 27 Oct 2012 17:01:27 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Date: Sat, 27 Oct 2012 17:01:27 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: freebsd@johnea.net
Subject: Re: 9.1 and gmirror with GPT?
In-Reply-To: <508C5BE6.4000405@johnea.net>
Message-ID: <alpine.BSF.2.00.1210271655200.69926@wonkity.com>
References: <5082EAEE.4040609@johnea.net> <50833F78.1060609@bnrlabs.com>
 <alpine.BSF.2.00.1210210827530.70277@wonkity.com>
 <5085C743.8000508@johnea.net>
 <alpine.BSF.2.00.1210221631250.13158@wonkity.com>
 <5086C7EB.9020104@johnea.net>
 <alpine.BSF.2.00.1210231837130.21493@wonkity.com>
 <508C2043.8070205@johnea.net>
 <alpine.BSF.2.00.1210271530190.69926@wonkity.com>
 <508C5BE6.4000405@johnea.net>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7
 (wonkity.com [127.0.0.1]); Sat, 27 Oct 2012 17:01:27 -0600 (MDT)
Cc: freebsd-questions@freebsd.org
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
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: Sat, 27 Oct 2012 23:01:29 -0000

On Sat, 27 Oct 2012, freebsd@johnea.net wrote:

> I ended up just ignoring the not aligned warning from the "gpart add -t freebsd" and went on to add the freebsd-swap and freebsd-ufs partitions with "-a 4k" option.
>
> Do you think I'm aligned?
...
> =>        63  3907029104  mirror/gm0  MBR  (1.8T)
>          63          63              - free -  (31k)
>         126  3907028979           1  freebsd  (1.8T)
>  3907029105          62              - free -  (31k)
>
> =>         0  3907028979  mirror/gm0s1  BSD  (1.8T)
>           0           2                - free -  (1.0k)
>           2    16777216             1  freebsd-swap  (8.0G)
>    16777218  3890251760             2  freebsd-ufs  (1.8T)
>  3907028978           1                - free -  (512B)

The slice starts at block 126, and then the swap partition starts an 
additional two blocks into the slice, which is block 128, evenly 
divisible by 8 (4096 = 512 * 8).

The freebsd-ufs partition starts at 126+16777218, which is also evenly 
divisible by 8.

So yes, that looks aligned to me.