[Novalug] How to find hardware device access point

[Megan Larko]

Hi,

I have a box running 64-bit CentOS 5.3.   The hardware has an internal DVD-ROM.   So to write a DVD 
I attach a USB2.0 Sony Plextor unit (good hw!).   The device works with CentOS DVD-Creator.  I would 
like to use the command line (so that I can later script it).

My cdrecord -scanbus shows:
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily - Red 
Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c	1.83 04/05/20 Copyright 1997 J. Schilling').
scsibus1:
	1,0,0	100) 'TEAC    ' 'DVD-ROM DV28SV  ' 'D.0J' Removable CD-ROM
	1,1,0	101) *
	1,2,0	102) *
	1,3,0	103) *
	1,4,0	104) *
	1,5,0	105) *
	1,6,0	106) *
	1,7,0	107) *
scsibus6:
	6,0,0	600) 'SONY    ' 'DVD RW DRU-810A ' '2.0b' Removable CD-ROM
	6,1,0	601) *
	6,2,0	602) *
	6,3,0	603) *
	6,4,0	604) *
	6,5,0	605) *
	6,6,0	606) *
	6,7,0	607) *

I have tried to format the DVD in the Sony USB2.0 hw by entering:
 >>dvd+rw-format -force /dev/scd1
* BD/DVD±RW/-RAM format utility by <appro at fy.chalmers.se>, version 7.0.
:-( mounted media doesn't appear to be DVD±RW, DVD-RAM or Blu-ray

I *think* I am getting the internal DVD-ROM.  How do I find the hardware device address of the SONY 
shown in "cdrecord -scanbus"?  Does it default to /dev/scd2??

TIA,
megan