IBM RedBooks SAN24B-5, Installation, Service And User Manual

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Table 4. Port side LED patterns during normal operation (continued)
LED name LED color Status of hardware Recommended action
Optical media
port status (one
bi-color LED
for each FC
port) Off No light or signal carrier on media
interface Verify that the transceiver is installed
correctly and that the cable is
connected correctly.
Steady amber Receiving light or carrier, but not
online. No action required.
Slow blinking
amber (2 sec) Disabled (by diagnostics or by
portDisable command)
Verify that the diagnostic tests are not
being run. Re-enable the port using the
portEnable
command.
Fast blinking
amber (1/2 sec) Port failure. Check the management interface and
the error log for details on the cause of
the failure. Contact IBM Support if
necessary.
Steady green Online. No action required.
Slow blinking
green (2 sec) Online but segmented (loopback cable
or incompatible switch) No action required.
Fast blinking
green (1/2 sec) Internal loop-back (diagnostic) No action required.
Flickering green Online, frames flowing through port. No action required.
Table 5 describes the non-port side LEDs and their behavior.
Table 5. Non-port side LED patterns during normal operation
LED name LED color Status of hardware Recommended action
Power supply /
fan assembly
status (green) No light Power supply/fan is not receiving
power or is off. Verify that the power supply/fan is on
and seated and the power cord is
connected to a functioning power
source.
Steady green Power supply/fan is operating
normally. No action required.
Flashing green Power supply/fan is faulty.
Note: When the switch is first
powered on the PS/fan status LED
will show flashing green until POST
has completed.
Check the power cable connection.
Verify that the power supply/fan is
powered on.
Replace the power supply/fan FRU.
POST and boot specifications
When the switch is turned on or rebooted, the switch performs a power-on self-test
(POST). Total boot time with POST can be several minutes. POST can be omitted
after subsequent reboots by using the
fastBoot command or entering the
diagDisablePost command to persistently disable POST.
For more information about these commands, refer to the Fabric OS Command
Reference Manual .
POST
The success or failure results of the diagnostic tests that run during POST can be
monitored through LED activity, the error log, or the command line interface.
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SAN24B-5 Installation, Service, and User Guide