The number of SAPs is is directly related to the number of available PUs in a book/drawer, and therefore to the number of configured CPs, IFLs, etc.
In a one drawer z10, there are 17 PUs, of which 3 are standard SAPs and 2 are reserved spares. This means the customer can characterize 12 of the other PUs as CPs, IFLs, CFs, IIPs AAPs, or SAPs. If you choose to configure the allowable maximum of 3 of the spare PUs as SAPs, you have only 9 PUs to configure as some other type of processor. In this way, the number of SAPs is directly related to the physical number of PUs/CPs. The number of configurable SAPs varies from model to model (1 to 4 books) because the number of spares is fixed at two per CEC. In a four book z10 you can configure an additional 18 SAPs in the E56, not the "theoretical" 12 (4 * 3), and 21 in the E64. Interestingly enough, in the z13 the number of additional SAPs allowed goes up by a steady 4 for each drawer and is limited to a max of 24 for either the NC9 or NE1 models. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
