Comment 34 for bug 646293

I can also confirm this problem with a different USB DVDRW drive:

<sudo lshw -C disk> results in:

  *-cdrom
       description: DVD-RAM writer
       product: DVD RW DRU-830A
       vendor: SONY
       physical id: 0.0.0
       bus info: scsi@5:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/sr0
       version: SS15
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: status=ready
     *-medium
          physical id: 0
          logical name: /dev/cdrom

However, the drive does not appear accessible in user space. This, at least, eliminate the Toshiba as the culprit.