From owner-freebsd-questions@FreeBSD.ORG  Wed Jun  5 18:50:18 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id B22177BF
 for <freebsd-questions@freebsd.org>; Wed,  5 Jun 2013 18:50:18 +0000 (UTC)
 (envelope-from wblock@wonkity.com)
Received: from wonkity.com (wonkity.com [67.158.26.137])
 by mx1.freebsd.org (Postfix) with ESMTP id 78EF51A9B
 for <freebsd-questions@freebsd.org>; Wed,  5 Jun 2013 18:50:18 +0000 (UTC)
Received: from wonkity.com (localhost [127.0.0.1])
 by wonkity.com (8.14.7/8.14.7) with ESMTP id r55IoBrj057187;
 Wed, 5 Jun 2013 12:50:11 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Received: from localhost (wblock@localhost)
 by wonkity.com (8.14.7/8.14.7/Submit) with ESMTP id r55IoB57057184;
 Wed, 5 Jun 2013 12:50:11 -0600 (MDT)
 (envelope-from wblock@wonkity.com)
Date: Wed, 5 Jun 2013 12:50:11 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Joseph Mays <mays@win.net>
Subject: Re: USB can't mount msdosfs drive
In-Reply-To: <D16334484B0C4155A21C15070F51738B@Gantry>
Message-ID: <alpine.BSF.2.00.1306051244360.56946@wonkity.com>
References: <D16334484B0C4155A21C15070F51738B@Gantry>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3
 (wonkity.com [127.0.0.1]); Wed, 05 Jun 2013 12:50:12 -0600 (MDT)
Cc: freebsd-questions@freebsd.org
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 05 Jun 2013 18:50:18 -0000

On Wed, 5 Jun 2013, Joseph Mays wrote:

> Tried several iterations, though it?s clearly a fat32 formatted USB drive. Shown  below are the results of fdisk and the mount_msdosfs command.
>
>
> root@warehouse:/root # fdisk /dev/da2
> ******* Working on device /dev/da2 *******
> parameters extracted from in-core disklabel are:
> cylinders=1897 heads=255 sectors/track=63 (16065 blks/cyl)
>
> Figures below won't work with BIOS for partitions not in cyl 1
> parameters to be used for BIOS calculations are:
> cylinders=1897 heads=255 sectors/track=63 (16065 blks/cyl)
>
> Media sector size is 512
> Warning: BIOS sector numbering starts with sector 1
> Information from DOS bootblock is:
> The data for partition 1 is:
> sysid 12 (0x0c),(DOS or Windows 95 with 32 bit FAT (LBA))
>    start 8064, size 30473088 (14879 Meg), flag 80 (active)
>        beg: cyl 1/ head 0/ sector 1;
>        end: cyl 706/ head 115/ sector 52
> The data for partition 2 is:
> <UNUSED>
> The data for partition 3 is:
> <UNUSED>
> The data for partition 4 is:
> <UNUSED>
>
> root@warehouse:/root # mount_msdosfs /dev/da2s1 /usb2
> mount_msdosfs: /dev/da2s1: Invalid argument
> root@warehouse:/root #

Maybe the "large" option to mount_msdosfs(8)?

Also, something is odd about the first partition starting at 8064. 
What does 'gpart show da2' say?