Memory Channel

This document provides service and maintenance information for PCI Memory Channel (MC) subsystems. It is intended for field service engineers and includes:

• Field-Replaceable Units (FRUs): Procedures for removal and replacement of the CCMAB adapter, CCMHB hub, CCMFB fiber optics module, CCMLB linecard, fan assembly, and power cords.
• Configuration Requirements: Hardware, firmware, and software requirements for various AlphaServer models.
• Troubleshooting: Diagnostic procedures using console commands, error logging, and the DECevent utility, including interpretations of PCI status and MC-specific registers.
• Subsystem Configurations: Examples of virtual and standard hub cluster configurations and associated failure analysis.
• Firmware and Verification: Procedures for updating firmware and running the Memory Channel exerciser for hardware verification.