Apple IIe Card - Manual (Page 166)

Before you can create a custom partition, you must back up your hard
disk and then start up the program called Apple HD SC Setup, as follows:
1. Back up your hard disk, as described in “Backing Up Your
Hard Disk” in Chapter 1.
2. Turn off your Macintosh.
3. Insert the IIe Installer Disk.
4. Turn on the Macintosh.
5. Open the IIe Installer Disk.
6. Double-click the Apple HD SC Setup icon.
7. Click the Drive button until you see the name of the hard disk
you want to partition.
8. Click Update.
9. Click the Partition button.
You’re now prepared to create the custom partition.
Preparations
Appendix C: Creating Custom Partitions 150