Moin!
So, hier die dmesg Ausgabe ab Einstecken des Laufwerks am USB:
[  370.518775] usb 1-1.2: new high-speed USB device number 5 using dwc_otg
[  370.621656] usb 1-1.2: New USB device found, idVendor=04b4, idProduct=6830
[  370.621696] usb 1-1.2: New USB device strings: Mfr=56, Product=78, SerialNumber=100
[  370.621714] usb 1-1.2: Product: USB2.0 Storage Device
[  370.621730] usb 1-1.2: Manufacturer: Cypress Semiconductor
[  370.621748] usb 1-1.2: SerialNumber: DEF10B8BECBA
[  370.686977] ums-cypress 1-1.2:1.0: USB Mass Storage device detected
[  370.696148] scsi host0: usb-storage 1-1.2:1.0
[  370.697000] usbcore: registered new interface driver ums-cypress
[  371.691154] scsi 0:0:0:0: CD-ROM                     DVD+RW RW5240    1.19 PQ: 0 ANSI: 0
[  371.737089] sr 0:0:0:0: [sr0] scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
[  371.737129] cdrom: Uniform CD-ROM driver Revision: 3.20
[  371.745667] sr 0:0:0:0: Attached scsi CD-ROM sr0
[  371.766282] sr 0:0:0:0: Attached scsi generic sg0 type 5
ums-cypress dürfte hier das Zauberwort sein.
Ciao, Georg