IBM TotalStorage 3534-F08, Installation Manual

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Table 9 describes the back panel LED. It lists the name, location, and possible
colors of the LED. It then lists the status of the switch that is associated with each
LED color and recommends actions that you can take in response to that status.
Table 9. Back panel LED patterns during normal operation
Name of LED Location of LED Color of LED Status of hardware Recommended action
Switch Status Center of back
panel No light Either the switch is off,
the startup process is
not complete, or the
startup has failed. Verify that the switch is
on and that the startup
process has had time to
complete. If there is still
no light, contact IBM.
Steady green The switch is on and
startup has successfully
completed. No action is required.
Steady yellow A diagnostic test is in
progress, or one or
more ports are faulty. If no diagnostic tests are
running, check the Port
Status LEDs for fault
indicators (see Table 8 on
page 20).
Slow-flashing yellow A diagnostic failure has
occurred on one or
more ports. Errors might be listed in
the error log. Refer to the
IBM TotalStorage SAN
Fibre Channel Switch
3534 Model F08 User’s
Guide for more
information.
Interpreting POST
The 3534 Model F08 automatically performs a POST when the switch is plugged in,
restarted, or the system is reset. A POST includes a number of diagnostic tests.
Test results can be monitored through the LED activity, error log, Telnet command,
from a terminal screen, and so on.
A POST completes in 4.5 minutes. A slightly longer version of the memory test is
performed after cold starts. A cold start occurs after a complete power cycle, when
the switch is unplugged, then plugged back in. A warm start is any other type of
startup, such as an operating system restart or switch panic.
A POST consists of the following steps:
1. Preliminary POST diagnostics are run.
2. The operating system is initialized.
3. The hardware is initialized.
SJ000354
Switch Status LED
Figure 12. Back panel LED
22
IBM TotalStorage
™
SAN Fibre Channel Switch: 3534 Model F08 Installation Guide