In RVM are supported the DSK and Extended-DSK formats.
Disk of 3" or 3" 1/2 are supported also.
In RVM you can load or save your programs to disk using the two virtual drives.
If you don't use the second drive you can turn it off.
You can create new disk from the emulator formated or unformated.
You can also format the disks from the emulated machine.