From owner-freebsd-hardware@FreeBSD.ORG  Mon Feb  9 20:07:20 2004
Return-Path: <owner-freebsd-hardware@FreeBSD.ORG>
Delivered-To: freebsd-hardware@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 86B8016A4CE
	for <freebsd-hardware@freebsd.org>;
	Mon,  9 Feb 2004 20:07:20 -0800 (PST)
Received: from pit.databus.com (p70-227.acedsl.com [66.114.70.227])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 3E16443D1F
	for <freebsd-hardware@freebsd.org>;
	Mon,  9 Feb 2004 20:07:20 -0800 (PST)
	(envelope-from barney@pit.databus.com)
Received: from pit.databus.com (localhost [127.0.0.1])
	by pit.databus.com (8.12.10/8.12.10) with ESMTP id i1A47J6h068776;
	Mon, 9 Feb 2004 23:07:19 -0500 (EST)
	(envelope-from barney@pit.databus.com)
Received: (from barney@localhost)
	by pit.databus.com (8.12.10/8.12.10/Submit) id i1A47JG8068775;
	Mon, 9 Feb 2004 23:07:19 -0500 (EST)
	(envelope-from barney)
Date: Mon, 9 Feb 2004 23:07:19 -0500
From: Barney Wolff <barney@databus.com>
To: Dan Strick <strick@covad.net>
Message-ID: <20040210040719.GA68446@pit.databus.com>
References: <200402092347.i19NlTRV000718@mist.nodomain>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200402092347.i19NlTRV000718@mist.nodomain>
User-Agent: Mutt/1.5.6i
X-Scanned-By: MIMEDefang 2.39
cc: freebsd-hardware@freebsd.org
Subject: Re: short read from CD-RW
X-BeenThere: freebsd-hardware@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: General discussion of FreeBSD hardware
	<freebsd-hardware.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hardware>,
	<mailto:freebsd-hardware-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hardware>
List-Post: <mailto:freebsd-hardware@freebsd.org>
List-Help: <mailto:freebsd-hardware-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hardware>,
	<mailto:freebsd-hardware-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 10 Feb 2004 04:07:20 -0000

On Mon, Feb 09, 2004 at 03:47:29PM -0800, Dan Strick wrote:
> I just wrote an iso image to a virgin CD-RW with the following command:
> ...
> which is consistent with the iso image file size = 672792576 bytes =
> 657024 KB = 328512 2KB records.  When I read the data back in from
> the CD with this command:
> 
> 	dd if=/dev/acd0c of=xxx bs=2k
> 
> the dd program says:
> 
> 	dd: /dev/acd0c: Input/output error
> 	328510+0 records in
> 	328510+0 records out
> 	672788480 bytes transferred in 252.669511 secs (2662721 bytes/sec)

Was the blank 700MB, or 650?  Various people have had trouble writing
the 5.2.1 cd to the latter, or at least were worried about it.

-- 
Barney Wolff         http://www.databus.com/bwresume.pdf
I'm available by contract or FT, in the NYC metro area or via the 'Net.