Fujitsu Siemens Computers SPARC Enterprise M8000 - Manual (Page 42)

2-10 SPARC Enterprise Mx000 Servers Dynamic Reconfiguration User’s Guide • September 2007
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.
2.1.2 System Board Configuration Requirements
XSCF enables the Uni-XSB or Quad-XSB setting according to the configuration
conditions to determine the division type. If the CPU or memory configuration does
not meet the configuration conditions, neither Uni-XSB nor Quad-XSB can be set as
the division type.
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.
2.1.3 System 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.