I just wanted to make some extra promotion for this EXCELLENT program.
As far as I know it is the only tool which makes it easily possible to read and write the strangest floppy formats on a PC.
I used it to back-up the Fluke 9100A floppies and it works great. You do need to use the command line but if you read the help-file it's dead easy.
I'm posting it here as it is also (or mostly) used to back up floppies of all kinds of old computers etc. etc. so maybe owners of these systems might find it useful.
There a few more of these tools around, but non work (good) on modern day PCs. This does.
http://simonowen.com/samdisk