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5
Setting Up the Memory Channel Cluster
Interconnect
This chapter describes Memory Channel configuration restrictions, and
describes how to set up the Memory Channel cluster interconnect, including
setting up a Memory Channel hub, Memory Channel optical converter (MC2
only), and connecting link cables.
Two versions of the Memory Channel PCI adapter are available; CCMAA
and CCMAB (MC2).
Two variations of the CCMAA PCI adapter are in use; CCMAA-AA (MC1)
and CCMAA-AB (MC1.5). As the hardware used with these two PCI
adapters is the same, this manual often refers to MC1 when referring to
either of these variations.
See the TruCluster Server Software Product Description (SPD) for a list
of the supported Memory Channel hardware. See the Memory Channel
User’s Guide for illustrations and more detailed information about installing
jumpers, Memory Channel adapters, and hubs.
You can have two Memory Channel adapters with TruCluster Server, but
only one rail can be active at a time. This is referred to as a failover pair. If
the active rail fails, cluster communications fails over to the inactive rail.
See Section 2.2 for a discussion on Memory Channel restrictions.
To set up the Memory Channel interconnects, follow these steps, referring to
the appropriate section and the Memory Channel User’s Guide as necessary:
1. Set the Memory Channel jumpers (Section 5.1).
2. Install the Memory Channel adapter into a PCI slot on each system
(Section 5.2).
3. If you are using fiber optics with MC2, install the CCMFB fiber optics
module (Section 5.3).
4. If you have more than two systems in the cluster, install a Memory
Channel hub (Section 5.4).
5. Connect the Memory Channel cables (Section 5.5).
6. After you complete steps 1 through 5 for all systems in the cluster, apply
power to the systems and run Memory Channel diagnostics (Section 5.6).
Setting Up the Memory Channel Cluster Interconnect 5–1