Sequential circuits samplers

I am following the instructions for formatting a disk in my Prophet 
2002, and keep getting the "iF" error. It is a DOS formatted 1.44mb HD 
disk. I tried covering the protect ntch with tape, and no improvement. 
Is it possible to use this type of disk?

I have an upgraded Prophet with more memory, and OS, but it does not 
have the 8 outs.

Thanks,
Josh