usb connected lite-on CR writer

[munn]

I want to mount a CD based file system using a Lite-On CD writer 
driver.  When I attach the drive I get the message

umass: LITE-ON CDRW LXR-40122C, rev 2.00/11.00, addr2

when I enter the command camcontrol devlist, I get the response

<LITE-ON LXR-40122 7S09> at scbus0 target 0 lun 0 ()

How do I mount the disk with mount_msdos?

When I look in /dev  I see the following scsi devices ( da0 .... da8)

da0     da0s1c       da0a    da0s1d     da0b    da0s1e     
da0c    da0s1f       da0d    da0s1g      da0e    da0s1h     
da0f    da0s2          da0g    da0s3        da0h    da0s4  
da0s1   da0s1a       da0s1b 

Robert Munn