From owner-freebsd-geom@FreeBSD.ORG  Sun Oct 16 16:20:33 2011
Return-Path: <owner-freebsd-geom@FreeBSD.ORG>
Delivered-To: freebsd-geom@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 79442106566C;
	Sun, 16 Oct 2011 16:20:33 +0000 (UTC) (envelope-from lev@FreeBSD.org)
Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru
	[IPv6:2a01:4f8:131:60a2::2])
	by mx1.freebsd.org (Postfix) with ESMTP id 130358FC17;
	Sun, 16 Oct 2011 16:20:33 +0000 (UTC)
Received: from lion.home.serebryakov.spb.ru (unknown
	[IPv6:2001:470:923f:1:586a:cd69:8b52:feee])
	(Authenticated sender: lev@serebryakov.spb.ru)
	by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPA id 4DBBD4AC2D; 
	Sun, 16 Oct 2011 20:20:31 +0400 (MSD)
Date: Sun, 16 Oct 2011 20:20:24 +0400
From: Lev Serebryakov <lev@FreeBSD.org>
Organization: FreeBSD Project
X-Priority: 3 (Normal)
Message-ID: <1977197077.20111016202024@serebryakov.spb.ru>
To: "Andrey V. Elsukov" <ae@FreeBSD.org>
In-Reply-To: <4E9B033A.6080103@FreeBSD.org>
References: <CAKWzaHa4jhcOb_zm0EkpjwGA0i+Uck3Vv_Fa0U7=RsfktjQPCw@mail.gmail.com>
	<165230773.20111016130358@serebryakov.spb.ru>
	<20111016110526.GA1764@mid.pc5.i.0x5.de>
	<1305170562.20111016155117@serebryakov.spb.ru>
	<4E9B033A.6080103@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=koi8-r
Content-Transfer-Encoding: quoted-printable
Cc: Nicolas Rachinsky <fbsd-mas-0@ml.turing-complete.org>, lev@FreeBSD.org,
	freebsd-geom@freebsd.org
Subject: Re: gmirror failed with error 19.
X-BeenThere: freebsd-geom@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: lev@FreeBSD.org
List-Id: GEOM-specific discussions and implementations
	<freebsd-geom.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-geom>
List-Post: <mailto:freebsd-geom@freebsd.org>
List-Help: <mailto:freebsd-geom-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 16 Oct 2011 16:20:33 -0000

Hello, Andrey.
You wrote 16 =CF=CB=D4=D1=C2=D2=D1 2011 =C7., 20:15:54:

>>> Of course you have to create the gpt inside the gmirror, not on the
>>> same device the gmirror is based on. The warnings occur, when the gpt
>>> is seen on the real disk. But later the gpt on the gmirror is used,
>>> and on the device created by gmirror, gpt uses the last sector of that
>>> device.
>>> I hope this will not change.
> Yes, it works as you have described.
  As we can see, it doesn't work as described for some users. And,
again, think about picking up GPT from mirror component, as reported
by many others.

> Can you give an example which motherboard does not work?
  No. But any EFI-bases or Hybrid BIOS (with traditional BIOS, but
2Tb+ HDD and GPT support from EFI) could be surprised.

> Our boot process uses PMBR and we are not expecting that BIOS has known
> anything about GPT. So it should work. If BIOS has known about GPT then
> it is EFI firmware.
  Oh, by "BIOS" I mean any motherboard firmware, of course. BIOS is
 very generic term, basic input/output system, so EFI firmware is
 BIOS by definition of "BIOS" term itself, IMHO.

--=20
// Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>