gentoolinux mnt # dmesg | tail -n 30
scsi2 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 4
usb-storage: waiting for device to settle before scanning
  Vendor: Ydilo     Model: Flash Disk        Rev: 2.00
  Type:   CD-ROM                             ANSI SCSI revision: 02
sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
sr 2:0:0:0: Attached scsi CD-ROM sr0
usb-storage: device scan complete
usb 1-6: USB disconnect, address 4
usb 1-6: new high speed USB device using ehci_hcd and address 5
usb 1-6: configuration #1 chosen from 1 choice
scsi3 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 5
usb-storage: waiting for device to settle before scanning
  Vendor: Ydilo     Model: Flash Disk        Rev: 2.00
  Type:   CD-ROM                             ANSI SCSI revision: 02
sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
sr 3:0:0:0: Attached scsi CD-ROM sr0
usb-storage: device scan complete
usb 1-6: USB disconnect, address 5
usb 1-6: new high speed USB device using ehci_hcd and address 6
usb 1-6: configuration #1 chosen from 1 choice
scsi4 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
  Vendor: Ydilo     Model: Flash Disk        Rev: 2.00
  Type:   CD-ROM                             ANSI SCSI revision: 02
sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
sr 4:0:0:0: Attached scsi CD-ROM sr0
usb-storage: device scan complete