I would expect it to be much like an IDE zip, you need to have a disk in the drive when you boot, do that and see if it is recognized, in KDE I would expect a desktop icon, if that doesn't seem to work then from a terminal window or console look in dmesg for something about your LS drive using the following command:
dmesg | grep LS-120
if that does not give any info try:
dmesg | grep sd

also you could look at all connected scsi devices by using:
cat /proc/scsi/scsi

We need more info to help you any more than that.

rock