- Activate Master module.
- Select 7. Disk Utilities, 7. Format Disk.
- Select the drive to be formatted and press ENTER.
- Press Yes to confirm (Warning: Erases all information).
- If using a floppy, insert the disk.
Note: For Hard Disk Interleave optimization, when 'Are You Sure?' is displayed, press the Up/Down cursors to reveal the hidden menu and select an interleave option (0-8) before confirming.
Source: Emulator III — emulatoriii-user-guide (manual)
