Hmm I had one of those old 68030 accelerators (Jetfire 030), and now with my Blizzard 1260 I was getting the same strange FDD problem.. click click click grrrrrrrrrrrrrrrrrrrrrr DF0:

? *poof*... click click click grrrr..... I usually put a disk in to shut it up. But it happened on 2 different motherboards and 2 different accelerators. Of course now it isnt working very well at all, as you can see from my other thread. I may switch back to the 1D1 board to see if I still get the same effect. (currently 1D4).
(I'm glad I read my previews, because I misspelled disk.. with a c) lol