[prowler]

Omniflop will

• Read and write Atari ST disk image files (‘.st’).
  Read, write, and format Atari ST DSDD and Atari ST SS (320kB, 360kB) formats.
  Read, write, and format Atari 8-bit format (90kB).
  Read, write, and format Atari STE formats (738kB, 800kB, 810kB).
  Read, write, and format Atari ST 820kB format
  Read, write, and format Atari ST Power Up Plus format (913kB) Note: This may require retries when writing!

I'm not sure of the number of cylinders implied by the extended formats.