From owner-freebsd-fs@freebsd.org  Mon Feb 13 05:40:14 2017
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From: David Christensen <dpchrist@holgerdanske.com>
Subject: Re: FreeBSD 11 and 4+ GB files on optical disc
To: FreeBSD Filesystems <freebsd-fs@freebsd.org>
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Date: Sun, 12 Feb 2017 21:40:18 -0800
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On 02/10/17 10:46, Freddie Cash wrote:
> # kldload udf
> # mount -t udf /dev/cd0 /mnt

toor@freebsd:/root # kldload udf
toor@freebsd:/root # mkdir /mnt/cd0-udf
toor@freebsd:/root # mount -t udf /dev/cd0 /mnt/cd0-udf
mount_udf: /dev/cd0: Invalid argument


> You RTFM'd the wrong M.  ;)  Pretty much every option can be loaded as a
> module at runtime nowadays.
>
> I found this by doing a simple:
> # ls /boot/kernel/*udf*

toor@freebsd:/root # l /boot/kernel/*udf*
/boot/kernel/udf.ko*		/boot/kernel/udf_iconv.ko*


> There's also a mount_udf(8) man page to read through.

RTFM.  Try invoking mount_udf directly:

toor@freebsd:/root # mount_udf /dev/cd0 /mnt/cd0-udf
mount_udf: /dev/cd0: Invalid argument


Try it verbose:

root@freebsd:~ # mount_udf -v /dev/cd0 /mnt/cd0-udf
mount_udf: /dev/cd0: Invalid argument

root@freebsd:~ # mount_udf -v -v -v -v -v -v -v /dev/cd0 /mnt/cd0-udf
mount_udf: /dev/cd0: Invalid argument


Take a look at the device special file:

root@freebsd:~ # ls -l /dev/cd0
crw-r-----  1 root  operator  0x58 Feb 12 21:10 /dev/cd0


mount doesn't show it as already being mounted:

root@freebsd:~ # mount | grep cd0


I wonder if Xfce has grabbed the device file (?).  There is an icon on 
the desktop with the volume label of the DVD.  Right-clicking shows a 
menu including "Mount Volume", so I don't think Xfce has it mounted.


Eject DVD using the button on the drive, exit Xfce, insert DVD, try 
again from console -- nope, same error message.


Any ideas, anyone?


David