From owner-freebsd-usb@FreeBSD.ORG  Fri Nov 19 14:36:34 2010
Return-Path: <owner-freebsd-usb@FreeBSD.ORG>
Delivered-To: freebsd-usb@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5E0AC106566C
	for <freebsd-usb@freebsd.org>; Fri, 19 Nov 2010 14:36:34 +0000 (UTC)
	(envelope-from hselasky@c2i.net)
Received: from swip.net (mailfe03.c2i.net [212.247.154.66])
	by mx1.freebsd.org (Postfix) with ESMTP id E70768FC0A
	for <freebsd-usb@freebsd.org>; Fri, 19 Nov 2010 14:36:33 +0000 (UTC)
X-Cloudmark-Score: 0.000000 []
X-Cloudmark-Analysis: v=1.1 cv=drJD7N2WYgraSrvx4WFOmF+tWOmhzpnKhDnOdsziBzQ=
	c=1 sm=1 a=fsDGt_0-TPkA:10 a=8nJEP1OIZ-IA:10 a=CL8lFSKtTFcA:10
	a=i9M/sDlu2rpZ9XS819oYzg==:17 a=k8Rp0gd5krMBuSC2jNcA:9
	a=ZdFMwY5RIs6QTxh0DuM69M5fsKAA:4 a=wPNLvfGTeEIA:10
	a=i9M/sDlu2rpZ9XS819oYzg==:117
Received: from [188.126.198.129] (account mc467741@c2i.net HELO
	laptop002.hselasky.homeunix.org)
	by mailfe03.swip.net (CommuniGate Pro SMTP 5.2.19)
	with ESMTPA id 51475620; Fri, 19 Nov 2010 15:36:31 +0100
From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org,
 Matthias Apitz <guru@unixarea.de>
Date: Fri, 19 Nov 2010 15:37:25 +0100
User-Agent: KMail/1.13.5 (FreeBSD/8.1-STABLE; KDE/4.4.5; amd64; ; )
References: <20101119143337.GA3023@current.Sisis.de>
In-Reply-To: <20101119143337.GA3023@current.Sisis.de>
X-Face: +~\`s("[*<S!NI[0M*"FaghA8S>|O,="7?X@L.elg*F"OA\I/3%^p8g?ab%RN'(; _IjlA:
	hGE..Ew, XAQ*o#\/M~SC=S1-f9{EzRfT'|Hhll5Q]ha5Bt-s|oTlKMusi:1e[wJl}kd}GR
	Z0adGx-x_0zGbZj'e(Y[(UNle~)8CQWXW@:DX+9)_YlB[tIccCPN$7/L'
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201011191537.25867.hselasky@c2i.net>
Cc: 
Subject: Re: copying /dev/da0 with dd(1) to file: output differs
X-BeenThere: freebsd-usb@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: FreeBSD support for USB <freebsd-usb.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-usb>,
	<mailto:freebsd-usb-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-usb>
List-Post: <mailto:freebsd-usb@freebsd.org>
List-Help: <mailto:freebsd-usb-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-usb>,
	<mailto:freebsd-usb-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 19 Nov 2010 14:36:34 -0000

On Friday 19 November 2010 15:33:37 Matthias Apitz wrote:
> Hello,
> 
> How is this possible:
> 
> $ dd if=/dev/da0 of=f1
> 7892087+0 records in
> 7892087+0 records out
> $ dd if=/dev/da0 of=f2
> 7892087+0 records in
> 7892087+0 records out
> $ diff f1 f1
> Files f1 and f2 differ
> 
> (and no, /dev/da0s1a is not mounted).
> 
> Thx
> 
> 	matthias

Hi,

Can you dump the data into hex using hexdump -C and show us the difference.

Usually you would use bs=65536 (Does that change anything)?

--HPS