3
CHAPTER 2
General TroubleshootingProcedures
This chapter contains the following sections:
■“TroubleshootingOverview Tasks”on page 3
■“Multipathing Options in the Sun StorEdge 6900 Series” on page 7
■“Fibre Channel Links” on page15
■“Storage Automated Diagnostic Environment Event Grid” on page21

Troubleshooting Overview Tasks

This section lists the high-level steps to isolate and troubleshoot problemsin the Sun
StorEdge 3900 and 6900 series. It offersa 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.