Note – Do not move a device that is part of a redundant configuration from one domain to another domain. The consequences of two domains simultaneously accessing the same device through different paths could be disastrous, such as data corruption.
2.1.2System Board Configuration Requirements
XSCF enables the
For the CPU configuration and memory configuration conditions set for the division types, refer to the System Overview for your system.
The setting of division type may be changed for DR operation if a domain operation requirement dictates changing of a necessary hardware resource when a system board is added to the domain.
In such cases, the CPU configuration and memory configuration conditions for changing the division type are the same as described above. For the conditions, refer to the System Overview for your system.
Note – Changing the division type before a DR operation may not be possible depending on the system board status or DR operation, even if configuration conditions have been met.
2.1.3System Board Pool Function
The system board pooling function places a specific system board in the status where that board does not belong to any domain.
This function can be effectively used to move a system board among multiple domains as needed.
For example, a system board can be added from the system board pool to a domain where CPU or memory has a high load. When the added system board becomes unnecessary, the system board can be returned to the system board pool.
All system boards that are targets of DR operations must be registered in the target domain’s Domain Component List (DCL). A domain’s DCL, managed by XSCF, is a list of system boards that are, or are to be, attached to that domain. The DCL of each domain contains not only information of registered system boards but also domain information and option information of each system board.