159
Performing Node Reconfiguration
If a CMP/memory module pair develops a fault, the server can be reconfigured to
run in a degraded state until the CMP/memory module is replaced. In addition, you
can add CMP/memory module pairs to existing systems. However, adding or
removing CMP/memory modules might affect internal hardware device addresses,
as well as the device address of any external devices attached to the system such as
external disk arrays and devices attached via an External I/O Expansion Unit.
Depending on which CMP/memory module is added or removed, it might be
necessary to manually reassign one or more I/O devices before they can function
correctly in the new system configuration.
Related Information
■“Managing Faults” on page11
■“Servicing PCIe Cards” on page96
Topic Li nks
Learn about how CMP/memory modules
map to I/O devices.
“I/O Connections to CMP/Memory
Modules” on page160
Learn how to reconfigure the server to
temporarily bypass a failed CMP/memory
module
“Reconfiguring I/O Device Nodes” on
page162
Disable memory modules “Temporarily Disable All Memory Modules”
on page164
Reconfigure I/O and PCIe fabric “Reconfigure the I/O and PCIe Fabric” on
page163
Re-enable memory modules to work in a
new I/O and PCIe configuration
“Re-Enable All Memory Modules” on
page165
Reset logical domain guest configuration “Reset the LDoms Guest Configuration” on
page166
Reference for system bus topology “System Bus Topology” on page167
Reference for I/O fabric in supported
configurations
“I/O Fabric in 2P Configuration” on page168
“I/O Fabric in 4P Configuration” on page169