1. Place the System Disk 1 floppy disk in the floppy disk drive. 2. Hold down the "Soft Keys", "F2", and "F4", and turn on the 9100A power (or press the Restart button on the right side panel if the power is already on). 3. When the display message indicates that it is booting from the floppy disc, release the three keys. 4. Change to system Disk 2 when instructed by the display. 5. When the 9100A displays the READ message, the software can be loaded on the hard disk by using the COPY function in the Main Menu to copy the System and User disks (and the Programmer's software, if applicable) from the floppy discs to the hard disk...... From the 9100 Service Manual pg 4-70 ----------------------------------------------------------------------------<end manual quote>------------------------------------------------------------------- Well, I tried this, with a regular SCSI drive and nothing happened. So it turns out that there is a Service Disk that is required to format the hard drive. So, does anyone have a disk labeled as such? John :-#)#