dvd+rw on freebsd 4.10

[atk2 at arctic.org]

Thank you for the comments. I am now attempting to burn my first dvd and
I keep getting this error:

bash-2.05b# growisofs -dvd-compat -Z /dev/cd1a -R /a /b
:-( unable to cam_open_pass("/dev/pass4",O_RDWR): No such file or directory
--

I am unsure what causes this to happen. There is no /dev/pass4 but 
MAKDEV /dev/pass4 resulted in :

bash-2.05b# ls -al /dev/pass*
crw-------  1 root  operator   31,   0 Jun 19 00:08 /dev/pass0
crw-------  1 root  operator   31,   1 Jun 19 00:08 /dev/pass1
crw-------  1 root  operator   31,   2 Jun 19 00:08 /dev/pass2
crw-------  1 root  operator   31,   3 Jun 19 00:08 /dev/pass3
bash-2.05b#
bash-2.05b#
bash-2.05b# /dev/MAKEDEV /dev/pass4
/dev/pass4 - no such device name
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Is this a simple thing to fix ?