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3
CHAPTER
2
General Troubleshooting
Procedures
This chapter contains the following sections:
■ “Troubleshooting Overview Tasks” on page 3
■ “Multipathing Options in the Sun StorEdge 6900 Series” on page 7
■ “Fibre Channel Links” on page 15
■ “Storage Automated Diagnostic Environment Event Grid” on page 21
Troubleshooting Overview Tasks
This section lists the high-level steps 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 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 HBAs to go offline. Concentrating on the switch and fixing that failure can
help bring the ports and HBAs back online.