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On other platforms, a partition is a portion of the system hard disk drive that you create to run different operating systems on the same disk, or to give the appearance of separate hard disk drives 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. When DPM mode is used, only z/VM, Linux, and SSC partitions$^{a}$ (LPARs) and connections to them can be defined. 

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

The flowchart that is shown in Figure 1-2 is divided in two 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 to the customer. 

The other stream (right side of the flowchart) is based on definitions that use the DPM wizard in basic mode. Based on the input that is provided to the DPM wizard, a configuration is activated that is used on the z14 ZR1 and the devices that are attached to the server. The actions that are defined in the two streams must be performed in sequence. 

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