Logical partitions

The Processor Resource/System Manager (PR/SM) feature allows a single processor to run multiple operating systems in logically partitioned (LPAR) mode. Each operating system has its own logical partition, which is a separate set of system resources including:

A portion of storage (central, or central and expanded)
One or more central and specialty processors. The processors can be dedicated or shared.

Only LPAR mode is supported on IBM® Z processors.

Start of change There are restrictions on a dynamic activation of partitions. You cannot dynamically activate a configuration that changes the name of a partition. The dynamic activation of such a change must be done in two steps. First change the partition into a reserved partition. Then you can activate the configuration with the new name. End of change