From owner-freebsd-fs@FreeBSD.ORG  Thu Mar 31 17:11:11 2011
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 58665106567D
	for <freebsd-fs@freebsd.org>; Thu, 31 Mar 2011 17:11:11 +0000 (UTC)
	(envelope-from ppaczyn@gmail.com)
Received: from mail-iw0-f182.google.com (mail-iw0-f182.google.com
	[209.85.214.182])
	by mx1.freebsd.org (Postfix) with ESMTP id 247EA8FC2B
	for <freebsd-fs@freebsd.org>; Thu, 31 Mar 2011 17:11:10 +0000 (UTC)
Received: by iwn33 with SMTP id 33so3244212iwn.13
	for <freebsd-fs@freebsd.org>; Thu, 31 Mar 2011 10:11:10 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:date:message-id:subject:from:to
	:content-type:content-transfer-encoding;
	bh=aXHRKrqpvH37OConE2gHXRn3NPxvi7PeLZMPQ4vOJE0=;
	b=RyKo7A3iW9WYznewsa47Mm+SeqIR/rveRvDH560VTWhk6cR32D4/YQd5VqvOzWVvBK
	AmtHYXizgXy01geAbPdetCUXHa0BmxD1iqqvYota8wEk1Qn3bldmxYC1bpP9WuZUOIFL
	zQiT/IdLX7YgtWSNPIbYvLMDTdQi6jlR55Ibg=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:date:message-id:subject:from:to:content-type
	:content-transfer-encoding;
	b=fWlpNMTeodtD+F227RhVEf9LBVfsjpokPYmaKC9ogKVZzJUh/hlXkROTUF9k2jDEBo
	FsclnuSBEpbkndpgdhuKHLKFnxwl4eQQ4X1uMcvn7IFItAUo+Ai7zln/byHnaMEA/rIm
	xZWQtHFIrlSUYW4pxwCt1BIYIUgRqWtcnBYyM=
MIME-Version: 1.0
Received: by 10.42.146.135 with SMTP id j7mr1854323icv.198.1301590092557; Thu,
	31 Mar 2011 09:48:12 -0700 (PDT)
Received: by 10.42.172.201 with HTTP; Thu, 31 Mar 2011 09:48:12 -0700 (PDT)
Date: Thu, 31 Mar 2011 18:48:12 +0200
Message-ID: <AANLkTi=CJu2FByAQUzZVr6C76aU1QXaE6Yx-rScsrgxq@mail.gmail.com>
From: Piotr Paczynski <ppaczyn@gmail.com>
To: freebsd-fs@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Subject: ZFS failed after hard power off
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 31 Mar 2011 17:11:11 -0000

Hi all,

I urgently need help. After hard power-off (power cable disconnected)
my FreeBSD 8.1-STABLE server fails to boot from ZFS with an I/O Error.
I was able to boot to Fixit console from 8.2 LiveFS, prepare it for
ZFS and mount the pool using "zpool import -Ff" command. Here are the
results:

Fixit# zpool status
=A0 pool: zroot
=A0state: FAULTED
status: The pool metadata is corrupted and the pool cannot be opened.
action: Destroy and re-create the pool from a backup source.
=A0=A0 see: http://www.sun.com/msg/ZFS-8000-72
=A0scrub: none requested
config:
=A0=A0=A0=A0=A0=A0=A0 NAME=A0=A0=A0=A0=A0=A0=A0=A0 STATE=A0=A0 READ WRITE C=
KSUM
=A0=A0=A0=A0=A0=A0=A0 zroot=A0=A0=A0=A0=A0=A0=A0 FAULTED=A0=A0=A0 0=A0=A0 =
=A0 0=A0=A0=A0=A0 1 corrupted data
=A0=A0=A0=A0=A0=A0=A0=A0=A0 gpt/array0 ONLINE=A0=A0=A0=A0 0=A0=A0=A0=A0 0=
=A0=A0=A0=A0 6

Also "zdb -l /dev/gpt/array0" shows 4 LABELS. Each has the same
attributes, in particular:
=A0 version=3D14
=A0 state=3D0
=A0 txg=3D4

Here are the screen-shots in case I missed something:
https://picasaweb.google.com/113032262178118660549/ZfsFailure#

Any pointers how to go about recovering data from this pool anyone?

--=20
Piotr Paczynski