Code:
drezliok@tuxeater:~$ dmesg|grep cd
sr0: scsi3-mmc drive: 48x/48x cd/rw xa/form2 cdda tray
sr1: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
drezliok@tuxeater:~$ dmesg|grep sr
Attached scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
Attached scsi CD-ROM sr1 at scsi0, channel 0, id 1, lun 0
sr0: scsi3-mmc drive: 48x/48x cd/rw xa/form2 cdda tray
sr1: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
drezliok@tuxeater:~$ dmesg|grep scd
drezliok@tuxeater:~$
My system is "tuxeater" because it's windows portion is called Orca.

The dmesg|grep scd did nothing as you see by the info.