I have a Robo Racer DVD burner
[ Amazon.com: Aleratec 280110 DVD/CD Robo Racer LS - Black: Electronics ] running under OpenSuse 10.3 and it's been fine until recent.
When it's working fine, two devices show up as /dev/ttyUSB0 and /dev/sr0. But now I'm only getting /dev/ttyUSB0

Last log entries that show sr0:
Feb 2 13:23:07 backup-server kernel: usb 2-2.4: new high speed USB device using ehci_hcd and address 9
Feb 2 13:23:07 backup-server kernel: usb 2-2.4: new device found, idVendor=05e3, idProduct=0701
Feb 2 13:23:07 backup-server kernel: usb 2-2.4: new device strings: Mfr=0, Product=1, SerialNumber=0
Feb 2 13:23:07 backup-server kernel: usb 2-2.4: Product: USB TO IDE
Feb 2 13:23:07 backup-server kernel: usb 2-2.4: configuration #1 chosen from 1 choice
Feb 2 13:23:07 backup-server kernel: scsi6 : SCSI emulation for USB Mass Storage devices
Feb 2 13:23:07 backup-server kernel: usb-storage: device found at 9
Feb 2 13:23:07 backup-server kernel: usb-storage: waiting for device to settle before scanning
Feb 2 13:23:08 backup-server kernel: scsi 6:0:0:0: CD-ROM ALERATEC DVDRW 20A1H 5T82 PQ: 0 ANSI: 0
Feb 2 13:23:08 backup-server kernel: sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Feb 2 13:23:08 backup-server kernel: sr 6:0:0:0: Attached scsi CD-ROM sr0
lsmod|grep usb shows
Code:
usb_storage           102816  0 
ide_core              165648  1 usb_storage
usbserial              52944  1 pl2303
usbhid                 58160  0 
hid                    43776  1 usbhid
ff_memless             22536  1 usbhid
usbcore               155560  7 usb_storage,pl2303,usbserial,usbhid,uhci_hcd,ehci_hcd
scsi_mod              176536  5 sr_mod,usb_storage,sg,sd_mod,libata
Is it possible the burner's damaged (except the serial usb port)?