It has probably been configured as /dev/sda

Most non-normal drives get sent through scsi emulation. At work I've been using a USB 1.44mb floppy drive (made by Imation). Knoppix puts
/dev/sda1
/dev/sda2
/dev/sda3
/dev/sda4
/dev/sda5


on my desktop. None of them work, but if I want to mount a floppy, I open a terminal and type

mount /dev/sda /mnt/floppy