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An example of an MES upgrade for processors (with two upgrade steps) is shown in Figure 8-3. 

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A model T01 max 34 (one processor drawer), model capacity identifier 708 (eight CPs), is concurrently upgraded to a model T01 max 71 (two processor drawers), with MCI 739 (39 CPs). The model upgrade requires adding a processor drawer and assigning and activating 39 PUs as CPs. Then, model max 71, MCI 739, is concurrently upgraded to a capacity identifier 740 (40 CPs) with two IFLs. This process is done by assigning and activating three more unassigned PUs (one as CP and two as IFLs). If needed, more LPARs can be created concurrently to use the newly added processors. 

The example that is shown in Figure 8-3 was used to show how the addition of PUs as CPs and IFLs and the addition of a processor drawer works. The addition of a processor drawer to a z15 Max 34 upgrades the machine to Max 71. 

After the second CPC drawer addition, CPC drawer 0 has 34 configurable PUs and CPC drawer 1 has 37 configurable PUs, which allows 71 PUs to be characterized on the new Max 71 configuration. 

Consideration:  Up to 190 logical processors (including reserved processors) can be defined to an LPAR. However, do not define more processors to an LPAR than the target operating system supports. 

