CDrw drive issue

[b r u ma]

hi,

I have two cdrw burners in my box, but only one is found with
$cdrecord -scanbus
Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg 
Schilling
Note: This version is an unofficial (modified) version with DVD support
Note: and therefore may have bugs that are not present in the original.
Note: Please send bug reports or support requests to 
http://bugzilla.redhat.com/bugzilla
Note: The author of cdrecord should not be bothered with problems in 
this version.
scsidev: 'ATA'
devname: 'ATA'
scsibus: -2 target: -2 lun: -2
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) *
         1,1,0   101) 'HL-DT-ST' 'DVDRAM GSA-4040B' 'A301' Removable CD-ROM
         1,2,0   102) *
         1,3,0   103) *
         1,4,0   104) *
         1,5,0   105) *
         1,6,0   106) *
         1,7,0   107) *

this one is attached on /dev/hdd and it works Ok.

But second drive is scsi, and is also found by my kernel:
$dmesg | grep -i scsi
SCSI subsystem initialized
ahc_pci:0:10:0: Host Adapter Bios disabled.  Using default SCSI device 
parameters
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
         <Adaptec 2902/04/10/15/20C/30C SCSI adapter>
         aic7850: Single Channel A, SCSI Id=7, 3/253 SCBs
(scsi0:A:3): 10.000MB/s transfers (10.000MHz, offset 15)
   Type:   CD-ROM                             ANSI SCSI revision: 02
sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray

Should I insert some module to get it working, I also notice that there 
is no device for scsi cdrw?!?

Any suggestions?

regards bruma