From owner-freebsd-questions@FreeBSD.ORG  Mon Jan  5 21:08:29 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 1623316A4CE
	for <freebsd-questions@freebsd.org>;
	Mon,  5 Jan 2004 21:08:29 -0800 (PST)
Received: from web41101.mail.yahoo.com (web41101.mail.yahoo.com
	[66.218.93.17])	by mx1.FreeBSD.org (Postfix) with SMTP id D752C43D31
	for <freebsd-questions@freebsd.org>;
	Mon,  5 Jan 2004 21:08:27 -0800 (PST)
	(envelope-from scott@sremick.net)
Message-ID: <20040106050827.95860.qmail@web41101.mail.yahoo.com>
Received: from [24.48.174.124] by web41101.mail.yahoo.com via HTTP;
	Mon, 05 Jan 2004 21:08:27 PST
X-RocketYMMF: siremick
Date: Mon, 5 Jan 2004 21:08:27 -0800 (PST)
From: "Scott I. Remick" <scott@sremick.net>
To: Sergey 'DoubleF' Zaharchenko <doublef@tele-kom.ru>,
	Malcolm Kay <malcolm.kay@internode.on.net>
In-Reply-To: <20040106073519.54620420.doublef@tele-kom.ru>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: FreeBSD <freebsd-questions@freebsd.org>
Subject: Re: "Cannot find file system superblock" error - how to recover?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: scott@sremick.net
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: Tue, 06 Jan 2004 05:08:29 -0000


--- Sergey 'DoubleF' Zaharchenko <doublef@tele-kom.ru> wrote:
> > I wonder whether editing the label and setting both offsets to 0
> > might solve the problem.
> 
> It definitely seems like that, as the actual offset of the partition is
> 0, as dd shows.

Ok, sounds like a plan. Not that I know what I'm doing. Should I use
something like the following command to save my current disklabel?

bsdlabel /dev/ad6s1c > disklabel.ad6s1c.backup

Then do I just edit a copy of that textfile, change the offsets to 0, then
write it back like this?

bsdlabel -R /dev/ad6s1c dislabel.ad6s1c.new

And lastly... your talk about offsets. The man page for bsdlabel describes
using it on the whole disk (ad6) and not a slice or partition. If I run it
on  ad6, I get:

bsdlabel: /dev/ad6: no valid label found

If I run it on the slice ad6s1 I get:

# /dev/ad6s1:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  c: 156344517        0    unused        0     0         # "raw" part, don't
edit
  e: 156344517        0    4.2BSD     2048 16384    89

And there I see the offset of 0 you might be talking about...? Are we
looking at the proper label? Just want to make sure before I mess things up.

Thanks!