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Troubleshooting

Use this information to diagnose and fix any problems that might occur in the storage expansion node.

If the check log LED on the compute node is lit, check the integrated management module II (IMM2) and Chassis Management Module (CMM) event logs. For instructions, see the troubleshooting information in the compute node Installation and Service Guide.

If the compute node fails to recognize or connect to the storage expansion node, follow the procedures in Connection failure.

  • Event messages
    Hardware events in the storage expansion node are detected by the integrated management module II (IMM2) in the compute node that is connected to the storage expansion node assembly.
  • Connection failure
    Use this procedure if the compute node fails to recognize or connect to the storage expansion node.
  • Light path diagnostics
    Light path diagnostics is a system of LEDs on the system board of the storage expansion node and on various internal components of the compute node. When an error occurs, LEDs can be lit in the storage expansion node and throughout the compute node to help identify the source of the error.