SCSI Drive Format

1. Ensure all power to the ESI and SCSI device is OFF.
2. Connect the SCSI device.
3. Turn on the external SCSI device, then turn on the ESI.
4. Press the Master/Global button.
5. Select Disk Utilities (7), then Format Disk (6).
6. Select the hard disk using the Data Entry Control and press ENTER.
7. The display asks 'Are You Sure?'. Press the Inc/Yes button to confirm.
8. Wait for the formatting process to complete.

Source: ESI-4000 — e-mu-esi4000-manual (manual)