From owner-freebsd-current@FreeBSD.ORG  Tue Mar 30 00:08:53 2010
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id AF0C71065670
	for <freebsd-current@freebsd.org>; Tue, 30 Mar 2010 00:08:53 +0000 (UTC)
	(envelope-from onemda@gmail.com)
Received: from ey-out-2122.google.com (ey-out-2122.google.com [74.125.78.25])
	by mx1.freebsd.org (Postfix) with ESMTP id 3FC1B8FC14
	for <freebsd-current@freebsd.org>; Tue, 30 Mar 2010 00:08:52 +0000 (UTC)
Received: by ey-out-2122.google.com with SMTP id d26so847034eyd.9
	for <freebsd-current@freebsd.org>; Mon, 29 Mar 2010 17:08:52 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:received:in-reply-to:references
	:date:received:message-id:subject:from:to:cc:content-type;
	bh=RLsR9g9s1YNxCkORVXhKpYXATuRFed+XN7rKrUcG40E=;
	b=pQQgL7G7uOYmFK9fWwiHOS85eM/XAaT3zTNoWi3uDOTaxbD9iasF1FL1eEBcXUDdE7
	cth8uuFP+U7Vnvfrkgx2VH+K08LTs/jmZgCDBg4LV8cPDjBsEX+KhjJX9FWqDttg3K2q
	yMaxybZKbLtUz531is9xEaZ7V9Ub2DnNpCMsM=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type;
	b=Lsr57bj0u+60f4XaCryWEHDWoGX/xDqRCb+jh8ybWkF7ZHHFT7/WrB23iQF5OLLHtt
	B1pBxubVTowCw2XPQV02vNcpUt4Ym2R3iSFICPqGWDMwQfRnD94ISLLzgmyV0SypARAY
	jgdiQo+vZIZXdoRGYKBtIDWg9/E0vgwjNPDNY=
MIME-Version: 1.0
Received: by 10.216.13.82 with HTTP; Mon, 29 Mar 2010 17:08:51 -0700 (PDT)
In-Reply-To: <permail-20100329221104f0889e8400006cd5-a_best01@message-id.uni-muenster.de>
References: <permail-20100329221104f0889e8400006cd5-a_best01@message-id.uni-muenster.de>
Date: Tue, 30 Mar 2010 00:08:51 +0000
Received: by 10.216.87.204 with SMTP id y54mr1726706wee.193.1269907731376; 
	Mon, 29 Mar 2010 17:08:51 -0700 (PDT)
Message-ID: <3a142e751003291708nc3e110bjca1789cc807f61a2@mail.gmail.com>
From: Paul B Mahol <onemda@gmail.com>
To: Alexander Best <alexbestms@wwu.de>
Content-Type: text/plain; charset=ISO-8859-1
Cc: freebsd-current@freebsd.org
Subject: Re: fsck unable to read disk sectors
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 30 Mar 2010 00:08:53 -0000

On 3/29/10, Alexander Best <alexbestms@wwu.de> wrote:
> hi there,
>
> when doing fsck on my / fs i get this error:
>
> "Cannot Read BLK. 471617640" and "The Following Disk Sectors could not be
> read: 471617643". after this message the partition gets marked dirty.
>
> i performed the following steps to verify the problem:
>
> 1) dd if=/dev/ada0 of=/dev/null bs=1m
> 2) fsck / under freebsd 7
> 3) mount -u -o snapshot /.snap/snapshot1 / && fsck_ffs /.snap/snapshot1
>
> all three steps showed no problem with that harddrive whatsoever. also
> smartd
> doesn't complain about anything.
>
> i'm running HEAD (r205860) on amd64.
>
> this is the output of `dmesg -a|grep ada0`:
>
> ada0 at ahcich2 bus 0 scbus3 target 0 lun 0
> ada0: <SAMSUNG SP2504C VT100-50> ATA-7 SATA 2.x device
> ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
> ada0: Command Queueing enabled
> ada0: 238474MB (488395055 512 byte sectors: 16H 63S/T 16383C)

Last time I tried ahci on dead disk it did not complained at all
(usually I get dead LBA listed on console).