160 SPARC Enterprise T5440 Server Service Manual • June 2011
■“Servicing CMP/Memory Modules” on page102
■“Servicing FB-DIMMs” on page108
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 page168 and
CMP Number on page169 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 page167
■“I/O Fabric in 2P Configuration” on page168
■“I/O Fabric in 4P Configuration” on page169