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operating systems on the same disk, or to give the appearance of separate hard disks for multiple users or other purposes. On a mainframe system, a partition is a virtual representation of all of the physical hardware resources of that system, which include processors, memory, and input/output (I/O) adapters. On mainframe systems, as on other platforms, an adapter is a physical device that connects the system to other computers or devices. 

Note:  DPM mode cannot coexist with standard PR/SM mode at the same time. When using DPM mode, only z/VM, Linux and Secure Service Container (SSC) partitions$^{a}$ (LPARs) and connections to them can be defined. 

a. For DPM, the term partition  is equivalent to Logical Partition (LPAR) . 

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The flowchart presented in Figure 1-2 is divided in two different task streams. The stream on the left side of the flowchart is based on actions that must be performed by IBM on the SEs as preparation before the machine is handed over to the customer. The other stream (right side of the flowchart) is based on definitions using the DPM wizard in basic mode. Based on the input provided to the DPM wizard, a configuration will be activated that will be used on the z15 and the devices attached to the server. The actions defined in the two streams must be performed in sequence. 

