Commodore PC 10 - Page 457

Appendix F Configuring Your Hard Disk (Fdisk) 319
Choice 5 - Next Fixed Disk
This option appears on the fdisk main menu only if you have
more than one hard disk attached to your computer. If you
choose this option, fdisk changes the current disk drive to the
next drive number.
For example,
if the current disk drive is number 1, and you
choose option 5 on the main menu, fdisk changes the current
disk drive to number 2. You could then choose any of the fdisk
options to prepare the second fixed disk for MS·DOS.