fd0 would typically be the first internal floppy, yes. Guessing where the floppy will end up on your system is a challenge, though. Is this an USB floppy? What are you using to access it? (/media/something if you're on Ubuntu, I guess?)

Do you see promising messages in /var/log/syslog when you attach or detach the drive?

Curious to hear that somebody really tries to use floppies in this day and age. Are you sure the machine is able to boot off that floppy drive? A Flash USB would sound a lot less frustrating, they're more expensive than floppies of course but the form factor is nice and you can plug it in anywhere you see a USB port.