Cannot use my External DVD Writer

[perikillo]

  Hi people.

  I still cannot use my external writer Sony DRX-820U, went some GUI
aplicaction wants to do something my console start to cry:

umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0x46
umass0: Unsupported ATAPI command 0xb9

  I have my device created /dev/cd0, pass0, etc.

  If i test dvd+rw-mediainfo /dev/cd1

  bsblaptop# dvd+rw-mediainfo /dev/cd1

INQUIRY:                [SONY    ][DVD RW DRU-820A ][2.0c]

:-( unable to GET CONFIGURATION: Input/output error

Input/output error


  Some one knows whats is the meaning of this message?

  Is the device very  newt for FreeBSD 6.1?

I had read the handbook and enable everything i need to handle external
device, i can work with external HD, Digital Cameras, Ipod's, but i cannot
work with this device.

Thanks all for your time.