@see [[FileSystem]] [[CDRom]] [[Recover]]

  * http://en.wikipedia.org/wiki/Universal_Disk_Format
  * http://sourceforge.net/projects/linux-udf/
  * http://gentoo-wiki.com/HOWTO_Packet_Writing_on_CD-RW_Media
  * http://packages.qa.debian.org/u/udftools.html

  $ modprobe -v pktcdvd
  $ umount /dev/cdrom 
  $ cdrwtool -d /dev/cdrom -q
  using device /dev/cdrom
  1850KB internal buffer
  setting write speed to 12x
  Settings for /dev/cdrom:
        Fixed packets, size 32
        Mode-2 disc
  I'm going to do a quick setup of /dev/cdrom. The disc is going to be blanked and formatted with one big track.
  All data on the device will be lost!! Press CTRL-C to cancel now.
  ENTER to continue.
  Initiating quick disc blank
  Disc capacity is 275616 blocks (551232KB/538MB)
  Formatting track
  ...

  $ mount /mnt/cdrw
  # mount: /dev/pktcdvd0 is not a valid block device

 sudo apt-get install  udftools modconf
 dpkg-reconfigure udftools

  $ mount /dev/pktcdvd/0 /mnt/tmp
  # mount: block device /dev/pktcdvd/0 is write-protected, mounting read-only