Draft Document for Review September 23, 2019 1:37 am 8860ch01.fm 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. 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.  Figure 1-2 Installation flowchart DPM mode (applicable to both scenarios) a. For DPM, the term  partition  is equivalent to  Logical Partition (LPAR) .  4  IBM z15 (8561) Configuration Setup