From owner-freebsd-questions@FreeBSD.ORG  Wed Jun 10 06:58:59 2009
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C48F010656B0
	for <freebsd-questions@freebsd.org>;
	Wed, 10 Jun 2009 06:58:59 +0000 (UTC)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Received: from wojtek.tensor.gdynia.pl (wojtek.tensor.gdynia.pl
	[IPv6:2001:4070:101:2::1])
	by mx1.freebsd.org (Postfix) with ESMTP id 143538FC12
	for <freebsd-questions@freebsd.org>;
	Wed, 10 Jun 2009 06:58:57 +0000 (UTC)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Received: from wojtek.tensor.gdynia.pl (localhost [IPv6:::1])
	by wojtek.tensor.gdynia.pl (8.14.3/8.14.3) with ESMTP id n5A6wouR015083;
	Wed, 10 Jun 2009 08:58:50 +0200 (CEST)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Received: from localhost (wojtek@localhost)
	by wojtek.tensor.gdynia.pl (8.14.3/8.14.3/Submit) with ESMTP id
	n5A6wmtC015080; Wed, 10 Jun 2009 08:58:49 +0200 (CEST)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Date: Wed, 10 Jun 2009 08:58:48 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Valentin Bud <valentin.bud@gmail.com>
In-Reply-To: <139b44430906092312y2a16cb58o3248c1ac9c3f497d@mail.gmail.com>
Message-ID: <alpine.BSF.2.00.0906100858220.15079@wojtek.tensor.gdynia.pl>
References: <139b44430906092312y2a16cb58o3248c1ac9c3f497d@mail.gmail.com>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: freebsd-questions <freebsd-questions@freebsd.org>
Subject: Re: glabel(8) a gmirror(8) doesn't work
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Wed, 10 Jun 2009 06:59:00 -0000

> following
> procedure:
> 1. reboot to single user
> 2. mount -a
> 3. tunefs -L var /dev/mirror/system0s1d
> This commands exits with "Failed to write superblock".

replace mount -a with mount /

you can't write directly to partition which is mounted mounted