I hope you have 1.2, because this can't be done under 1.1
Use your favourite editor to edit the file called Mountlist in the DEVS
directory of your boot list. Change the unit number to match the position
of the drive (1, 2, or 3), and change the HighCyl entry to match the number
of tracks.
Now the important part. Change the device name (I think it is DF1: now) to
another name. Almost any name will do. Maybe DF5: for 5 1/4?? Anyway, you
may now use:
MUNT DF5:
oops.. MOUNT DF5:
to activate the entry. The system treats it as a whole new device called
DF5: This is the same technique you can use to partition a drive.