Interpreting Post Results; Power Supply/Fan Status Led Patterns - IBM SAN06B-R Installation, Service And User Manual

Table 13. Power supply/fan status LED patterns
LED color Status of hardware
No light Power supply/fan assembly is not seated
correctly.
Steady green Power supply/fan assembly is operating
normally.
Flashing green Power supply/fan assembly fault for one of
the following reasons:
v The power cable is disconnected
v Power supply/fan assembly is switched off
v The power supply has failed

Interpreting POST results

POST is a system check that is performed each time the switch is powered on,
rebooted, or reset, and during which the LEDs flash different colors.
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 diagShow command displays that the diagnostic status for all ports
3. Review the system log for errors. Errors detected during POST are written to
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SAN06B-R Installation, Service, and User Guide
"LED activity" on page 25). 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 "LED activity" on page 25.
in the switch is OK.
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.
Recommended action
Reseat power supply.
No action required.
1. Check the power cable connection.
2. Verify that the power supply/fan assembly is
powered on.
3. Run psShow and fanShow commands to
determine the source of the fault.
If the actions above do not resolve the problem,
replace the power supply/fan assembly.