Floppy drive is going nuts

[Daniela]

Recently, my floppy drive isn't working properly. The kernel often panics on 
unmount of a UFS floppy, and sometimes also while reading or writing an 
ordinary DOS-formatted floppy. Very often, the data is corrupted, but when 
formatting the floppy, it shows no errors. And once I tried to write a file 
(which is just a little bit over 1440k in size) to a 1720k formatted floppy 
(worked properly in the past), and the result was a complete system lockup.
I had to do a hard reset to bring it back. This is reproducable.

I'm running 4.10-STABLE. How can I tell whether this is a software bug or 
flaky hardware?

Regards,
Daniela