IBM SAN256B-6, Installation, Service And User Manual

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Table 24. Fan assembly LED descriptions (continued)
LED purpose Color Status Recommended action
Status
No light (LED is off) Fan assembly is either
healthy or does not have
power. Ensure that the fan
assembly has power.
Steady amber Fan assembly is being
initialized or has a failure
(full or partial). Wait to see if fan fully
initializes. If LED remains
amber, replace the fan
assembly.
Slow-flashing amber (on 2
seconds, then off 2 seconds) Fan assembly is not seated
correctly or is faulty. Pull the unit out and reseat
it. If the LED continues to
flash, replace the unit.
Flashing amber (on
½
second, then off 3.5
seconds)
Fan is disabled. Run the
fanEnable
command to enable the fan.
Fast-flashing amber (on
½
second, then off ½ second)
Environmental range
exceeded. Check for out-of-bounds
environmental condition,
resolve any problems, and
reseat the unit. If the LED
continues to flash, replace
the unit.
Note: If LED operation indicates fault or no power, verify that fan is fully seated in chassis and that
captive screws securing fan in chassis are fully tightened. If screws are loose, blowback from fans may
unseat fan from chassis connectors.
Interpreting POST and boot results
The device performs Power-On Self-Test (POST) by default each time the device is powered on, rebooted,
or reset. The device can be rebooted using the
reboot
to reboot each CP individually) or
fastBoot
commands. The
fastBoot
command reboots the switches without running POST. If the active CP blade is
rebooted, it fails over to the standby CP blade.
POST
About this task
The device automatically performs POST each time it is powered on or reset.
To verify that POST has completed without error, do the following:
v Verify that all LEDs return to a normal state after POST completes.
If one or more LEDs do not return to a normal state, and this is not due to the device being set to
beacon, refer to the relevant LED table to identify and correct the problem. For port blades, and CP
and core switch blades, the
slotShow command can be used to check the status of the slots. For
information about turning beaconing on or off, refer to the Fabric OS Administrator's Guide.
v Verify that the switch prompt displays when POST completes.
If it does not display, POST was not successfully completed. Contact the device supplier for support.
v Review the system error log using the
errShow
or
errDump
commands.
Any errors detected during POST are written to the system log, which is accessible through the
errShow command. For information about error messages, refer to the Fabric OS Message Reference.
POST includes the following steps:
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SAN256B-6 Installation, Service, and User Guide