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CHAPTER
Sun Proprietary/Confidential: Internal Use Only
2
General Troubleshooting
Procedures
This chapter contains the following sections:
■ “High-Level Troubleshooting Tasks” on page 3
■ “Host-Side Troubleshooting” on page 6
■ “Storage Service Processor-Side Troubleshooting” on page 6
■ “Verifying the Configuration Settings” on page 7
■ “Sun StorEdge 6900 Series Multipathing Example” on page 11
■ “Multipathing Options in the Sun StorEdge 6900 Series” on page 16
High-Level Troubleshooting Tasks
This section lists the high-level steps you can take to isolate and troubleshoot
problems in the Sun StorEdge 3900 and 6900 series. It offers a methodical approach,
and lists the tools and resources available at each step.
Note – A single problem can cause various errors throughout the storage area
network (SAN). A good practice is to begin by investigating the devices that have
experienced “Loss of Communication” events in the Storage Automated Diagnostic
Environment. These errors usually indicate more serious problems.
A “Loss of Communication” error on a switch, for example, could cause multiple
ports and host bus adapters (HBAs) to go offline. Concentrating on the switch and
fixing that failure can help bring the ports and HBAs back online.