Pktcdvd and DVD RW drive.

["João Luis Meloni Assirati" <assirati@nonada.if.usp.br>]

Hello,

I have an

 hdc: HL-DT-ST DVDRAM GSA-4120B, ATAPI CD/DVD-ROM drive

from LG. My kernel is a vanilla 2.6.11 with packet writing enabled. I noticed, 
however, that I can mount and write a CD-RW udf formatted with 

# cdrwtool -d /dev/hdc -q

without the need of the pktcdvd driver (with the module unloaded, indeed), 
simply with

# mount -t udf /dev/hdc /mnt

I thought that this was a property only of DVD+RW and DVDRAM media. Am I 
missing something here? What is then the use of pktcdvd driver?

Thanks in advice,
Joao Luis M. Assirati.