Fujitsu Siemens Computers SPARC Enterprise M4000, User Manual

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Chapter 2 What You Must Know Before Using DR 2-11
Moreover, a system board that is pooled can be assigned to a domain only when it is
registered on DCL. Pooled system boards must be properly managed.
You can add and delete system boards by combining the system board pooling
function with the floating board, omit-memory, and omit-I/O options described in
Section 2.2, “Conditions and Settings Using XSCF” on page 2-12 .
2.1.4 Checklists for System Configuration
This section describes the prerequisites and the checklists for configuring the system
for DR.
1. Redundant Configuration of I/O Devices - Before a system board can be replaced,
any I/O device connected to that board must be temporarily disconnected.
You should use redundant-configuration software to prevent any problem that
might be caused by disconnection of an I/O device that would affect a job
process. You should also confirm that the driver and software support DR before
performing a DR operation.
2. Selection of PCI Cards Supporting DR - All PCI cards and I/O device interfaces
on a system board must support DR. If not, you cannot execute DR operations on
that system board. You must turn off the power supply to the domain before
performing maintenance and installation.
3. Confirmation of DR Compliance of Drivers and Other Software - You must
confirm that all I/O device drivers and software installed in the system support
DR and allow the I/O device operations of DR.
You should also apply the latest patches to the drivers and other software before
performing DR.
4. Allocation of Sufficient Memory and Distributed Swap Areas - You must allocate
sufficient memory resources to be used when the memory on a system board is
disconnected. Performing a DR operation with a high load already applied to
memory may significantly lower job process performance and DR operability.
5. Consideration of Hardware Configuration and System Boards on Which Kernel
Memory is Loaded - Before determining the hardware configuration and
operations, you must understand how job processes are affected by DR operations
on system boards on which CPUs, memory, and I/O devices are mounted.
You can perform DR operations on system boards that contain kernel memory.
When disconnecting a system board on which kernel memory is loaded, DR
copies kernel memory into the memory on another system board. The copy
operation is based on the premise that the copy-destination system board does
not already contain any kernel memory.