Sun Microsystems StorEdge, Troubleshooting Manual

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Chapter 4 Troubleshooting Example 45
Example Assumptions
The troubleshooting example has the following assumptions:
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The latest patches, firmware, and packages are installed and running
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No host-based volume management software installed
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The two switches are zoned such that they present two isolated paths from the
HBAs through the ISL links to the Sun StorEdge T3+ arrays
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Each HBA has physical connectivity to only one Sun StorEdge T3+ arrays
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The Storage Automated Diagnostic Environment version 2.1 is configured to
automatically send email alert messages to the root user email account
Troubleshooting Outline
This section lists the broad steps on how to approach a SAN problem. It lays out a
methodical approach and lists various tools and resources available at each step.
Using the Storage Automated Diagnostic Environment version 2.1 for monitoring
vastly decreases the time-consuming process of narrowing down the problem.
1. Determine the error.
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Storage Automated Diagnostic Environment version 2.1 alert/email
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/var/adm/messages
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Application-specific errors
2. Determine the extent of the problem.
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Storage Automated Diagnostic Environment version 2.1 topology or device
monitoring view
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cfgadm -al
command output
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luxadm -e port
command output
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Multipathing information
Note –
The information gathered at this point determines the subsection to focus
attention on: Host-to-Switch, Switch-to-Switch (cascaded), or Switch-to-Storage.