Visara CCA-3074 Planning Guide - Manual (Page 34)

Chapter 3. Host Gens –OS/390 with HCD
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HCD Panel 10
The panel shown above is obtained by selecting option 3 on HCD panel
1. This panel is where we define our processor and whether this
processor is in LPAR MODE or in BASIC MODE (BASIC MODE
means partitioning is turned off).
HCD Panel 11
From this panel, you can select to work with the partitions.