From owner-freebsd-usb@FreeBSD.ORG  Fri Apr 25 21:48:08 2008
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 3E5031065674
	for <freebsd-usb@freebsd.org>; Fri, 25 Apr 2008 21:48:08 +0000 (UTC)
	(envelope-from hselasky@c2i.net)
Received: from swip.net (mailfe03.swip.net [212.247.154.65])
	by mx1.freebsd.org (Postfix) with ESMTP id CF69E8FC22
	for <freebsd-usb@freebsd.org>; Fri, 25 Apr 2008 21:48:07 +0000 (UTC)
	(envelope-from hselasky@c2i.net)
X-Cloudmark-Score: 0.000000 []
Received: from [62.113.133.152] (account mc467741@c2i.net [62.113.133.152]
	verified) by mailfe03.swip.net (CommuniGate Pro SMTP 5.1.13)
	with ESMTPA id 919365027; Fri, 25 Apr 2008 23:48:05 +0200
From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org
Date: Fri, 25 Apr 2008 23:49:25 +0200
User-Agent: KMail/1.9.7
References: <a276da400804250733v1e8db234x75265d7cfca915c@mail.gmail.com>
In-Reply-To: <a276da400804250733v1e8db234x75265d7cfca915c@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200804252349.25954.hselasky@c2i.net>
Cc: 
Subject: Re: USB Mass Storage Device with HPS Stack
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, 25 Apr 2008 21:48:08 -0000

On Friday 25 April 2008, Xiaofan Chen wrote:
> I've got a free USB flash disk from National Semiconductor. It may
> be the so-called U3 device since it comes up as a CDROM and
> a removable USB drive. The removable USB drive part works fine.
> But I am not able to mount the CD part which contains some datasheets
> from National Semiconductor. Any tips on this?
>

Hi,

The following line indicates that the software on the USB device was not ready 
at the moment the CD-ROM size was queried.

> cd0: Attempt to query device size failed: NOT READY, Medium not present

Try:

cat /dev/null > /dev/cd0

Then try to mount again. You can also try loading ata-usb instead of umass. 
ata-usb will query the disk size regularly.

--HPS