Why I haven't device /dev/cd0

[cblasius]

Hello !

I want to use DVD+RW. I looked in handbook and I saw there:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/creating-dvds.html

 >>16.7.5 Using a DVD+RW
 >>
 >>Unlike CD-RW, a virgin DVD+RW needs to be formatted before first use. 
 >>The growisofs(1) program will take care of it automatically whenever 
 >>appropriate, which is the recommended way. However you can use the 
 >>dvd+rw-format command to format the DVD+RW:
 >>
 >># dvd+rw-format /dev/cd0

It is a mistake?
In my folder /dev/ I have only the following devices for DVD:
/dev/acd0
and this (I do not remember exactly it name)
/dev/acd0t01

Where is /dev/cd0?

I want to format my DVD, but when I use:
# dvd+rw-format /dev/acd0
then I obtain error about something inappropriate ioctl.

Please for help. I'm beginner in FreeBSD.
I try format DVD+RW and then want to use for packet writing.
Is it possible?

Best regards,
cblasius