Diagnostic Testing - IBM System Storage SAN32B-E4 Installation, Service And User Manual

Note: While not recommended, POST can be omitted after subsequent reboots by
For more information about these commands, refer to the Fabric OS Command
Reference.
To determine whether POST completed successfully and whether any errors were
detected:
1. Verify that the LEDs on the switch indicate that all components are healthy (see
2. Verify that the switch prompt displays on the terminal of a computer
3. Using either Web Tools or the CLI, verify that the diagnostic status for all ports
4. Review the system log for errors.

Diagnostic testing

In addition to POST, the Fabric OS includes diagnostic tests to troubleshoot the
hardware and firmware. This includes tests of internal connections and circuitry,
fixed media, and the transceivers and cables. The tests are implemented by
command, either through a Telnet session or through a terminal set up for a serial
connection to the switch. Some tests require the ports to be connected by external
cables, to allow diagnostics to verify the serializer/deserializer interface,
transceiver, and cable. Some tests require loopback plugs.
Diagnostic tests are run at link speeds of 1 Gbps, 2 Gbps, 4 Gbps, and 8 Gbps. For
information about diagnostic tests, refer to the Fabric OS Administrator's Guide.
using the fastBoot command or entering the diagDisablePost command to
persistently disable POST.
"Interpreting LEDs" on page 31). If one or more LEDs do not display a healthy
state:
a. Verify that the LEDs are not set to "beacon"(this can be determined through
the switchShow command or Web Tools). For information about how to
turn beaconing on and off, see the Fabric OS Administrator's Guide or the
Web Tools Administrator's Guide.
b. Follow the recommended action for the observed LED behavior, as listed in
the tables in "Interpreting LEDs" on page 31.
workstation that is connected to the switch. If the prompt does not display
when POST completes, press Enter. If the prompt still does not display, open
another Telnet session or access the switch through another management tool.
If this is not successful, the switch did not successfully complete POST. Contact
your IBM representative.
in the switch is OK.
v If using Web Tools, select Port Admin or Status to display information about
the ports.
v If using the CLI, use the diagShow command
v If using Web Tools, errors are listed under Switch Events
v If using the CLI, errors detected during POST are written to the system log,
which is viewed using the errShow command. For more information about
this command, see the Fabric OS Command Reference. For information about
specific error messages, see the Fabric OS Message Reference
Chapter 3. Using and maintaining the switch
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