The central storage that is shared by all processors in a configuration is logically divided into storage increments. For the following example, the installation specified RSU=8 to make half of the storage increments reconfigurable.
| Increment | Type |
|---|---|
| 60M | Hardware storage area (HSA) and preferred |
| 56M | Reconfigurable |
| 52M | Reconfigurable |
| 48M | Reconfigurable |
| 44M | Reconfigurable |
| 40M | Reconfigurable |
| 36M | Reconfigurable |
| 32M | Reconfigurable |
| 28M | Reconfigurable |
| 24M | Preferred |
| 20M | Preferred |
| 16M | Preferred |
| 12M | System queue area (SQA) and Preferred |
| 8M | Preferred |
| 4M | Preferred |
| 0M | V=R and Preferred |
The HSA cannot be in a storage increment that will be reconfigured. The HSA resides in the five highest megabytes of central storage.