From owner-freebsd-stable@FreeBSD.ORG  Thu Sep 23 08:13:19 2004
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9B2CF16A4CE
	for <freebsd-stable@freebsd.org>;
	Thu, 23 Sep 2004 08:13:19 +0000 (GMT)
Received: from msr44.hinet.net (msr44.hinet.net [168.95.4.144])
	by mx1.FreeBSD.org (Postfix) with ESMTP id C210143D2F
	for <freebsd-stable@freebsd.org>;
	Thu, 23 Sep 2004 08:13:18 +0000 (GMT)
	(envelope-from yeskw@ms15.hinet.net)
Received: from hiperfect.com (dns.hiperfect.com [211.21.55.252])
	by msr44.hinet.net (8.9.3/8.9.3) with ESMTP id QAA15863
	for <freebsd-stable@freebsd.org>;
	Thu, 23 Sep 2004 16:13:16 +0800 (CST)
Date: Thu, 23 Sep 2004 16:13:16 +0800 (CST)
From: Kenwey <yeskw@ms15.hinet.net>
X-X-Sender: yeskww@hiperfect.com
To: freebsd-stable@freebsd.org
Message-ID: <Pine.LNX.4.61.0409231507550.32004@hiperfect.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Subject: How can I mount 2nd Hard disk (IDE)
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 23 Sep 2004 08:13:19 -0000

I get a warning message when I boot my FreeBSD 5.1, it shows as follows:

Detecting Primary Master ...WDC WD400JB-00ETA0 (40GB, running FreeBSD 5.1)
Detecting Primary Slave ... None
Detecting Secondary Master .WDC WD400BB-32CXA0 (40GB, /lib can't work well)
Detecting Secondary Slave ASUS CD-S520/A
SMART Failure Predicted on Primary Master: WDC WD400JB-00ETA0
WARNING: Immediately backup your data and replace your hard disk drive
A failure may be imminent.
Press F1 to conitnue, DEL to enter SETUP
02/16/2000-VT694X-P4V4X-00


I turn off the machine, and pull it (WDC WD400JB-00ETA0) from 
master and connect it to slave, then I do the following to backup :

# mount -r /dev/ad2s1a /mnt

it shows: incorrect super block

# disklabel -r ad2

the last line shows "super block 0"

do anyone know how can I repair it? is there any way to backup the data 
from this device?