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160 SPARC Enterprise T5440 Server Service Manual • June 2011
■ “Servicing CMP/Memory Modules” on page 102
■ “Servicing FB-DIMMs” on page 108
I/O Connections to CMP/Memory
Modules
Each PCIe slot and onboard I/O device is connected to one CMP module. Device
address is dependent on system configuration. See CMP Number on page 168 and
CMP Number on page 169 for more information.
If a CMP module fails, the onboard devices and slots directly connected to it become
unavailable. Recovery of the I/O services connected to the failed CMP requires I/O
node reconfiguration.
For example, in a 4P system, if CMP0 goes offline, the following devices become
unavailable:
■ PCIe0
■ PCIe1
■ Onboard hard drives
In this failure scenario, the system is unable to boot from internal drives.
Similarly, if CMP1 goes offline, the following devices become unavailable:
■ PCIe4
■ PCIe5
■ Onboard network devices
Related Information
■ “System Bus Topology” on page 167
■ “I/O Fabric in 2P Configuration” on page 168
■ “I/O Fabric in 4P Configuration” on page 169