Ron, your Firefly works great with my slug. Fantastic!
One more question. Is there a way to have the slug tell my drive to spin down when inactive? I have an Iogear 250GB drive plugged into the slug.
Make sure always_scan is set to 0, so it doesn't do background scans when no uses are connected.
Next, you'll have to configure your drive to spin down -- that means setting the power management options on the drive. On mine, I actually took the drives out of the chassis and put them in a pc, and ran the IBM disk management utility and set the APM settings on the drive to spin down after 10 min.
You'll have to find a utility that does the same thing. Maybe try loading the iomega stuff on your PC and seeing if they have a way to set spindown times using the pc software, then move the drive over to the slug.