
182 Introduction to the New Mainframe: z/VSE Basics
7.3 Static and dynamic partitions
All jobs in z/VSE are executed in partitions. A partition defines an area of virtual
storage available for program execution. Twelve partitions are started during IPL,
namely BG, F1, F2, F3,…, FA, FB, and controlled by VSE/POWER with the
exception of F1, where VSE/POWER is executing itself, and FB, where the Basic
Security Manager (BSM) is running. When a partition has been started under
VSE/POWER control, between 1 and 4 VSE/POWER job classes have been
associated with the partition together with a list of devices, which will be
emulated by VSE/POWER. This list ...