You can create partition profiles on your Hardware Management Console (HMC) that specify all of the resources on the managed system. If you activate such a partition profile when no logical partitions are running on the managed system, then the managed system assigns all of its resources to the logical partition to which the partition profile belongs.
If you add additional resources to the managed system, the managed system automatically assigns the added resources to the logical partition when the profile is activated. The profile must be activated while the server is in 'partition standby' state, because automatic restart of the partition will not assign newly added processor and memory resources. You do not need to change the partition profile for the managed system to assign the additional resources to the logical partition.
Because all of the hardware is assigned to the logical partition as required, no other logical partitions can be started when the partition profile that uses all of the system resources is running. Likewise, the partition profile that uses all of the system resources cannot be activated if any logical partition is running.