Chapter 3. Operating The Switch; Powering The Switch On And Off; Interpreting Led Activity - IBM SAN40B-4 - System Storage Switch User & Service Manual

Chapter 3. Operating the switch

This chapter provides the following information:
v "Powering the switch on and off"
v "Interpreting LED activity"
v "LED patterns" on page 23
v "POST and boot specifications" on page 25
v "Interpreting POST results" on page 26
v "Customer field replaceable units (CRUs/FRUs)" on page 31
v "Maintaining the switch" on page 26
v "Managing the switch" on page 33
v

Powering the switch on and off

See Chapter 2, "Installing and configuring the switch," on page 7 for initial setup
instructions before powering the switch on for the first time. Once the switch has
been properly configured, follow these instructions to power the switch on and off.
To power the switch on, connect one or both power cords to the power connectors
on the power supplies and to a power source; then, set the AC power switches to
"|". Power is supplied to the switch as soon as the first power supply is connected
and powered on.
The switch runs POST by default each time it is powered on; it requires a minimum
of three minutes to boot and complete POST.
To power the switch off, power off both power supplies by setting each AC power
switch to "O". All devices are returned to their initial state the next time the switch is
powered on.

Interpreting LED activity

System activity and status can be determined through the activity of the LEDs on
the switch. There are three possible LED states: no light, a steady light, and a
flashing light. The steady lights and flashing lights can be green or amber. The
LEDs flash either of these colors during boot, POST, or other diagnostic tests. This
is normal and does not indicate a problem unless the LEDs do not indicate a
healthy state after all boot processes and diagnostic tests are complete.
The switch has the following LEDs:
v System power LED–One LED (green) to indicate system power
v System status LED–One LED (green/amber) to indicate system status
v Ethernet status LEDs–Two LEDs to indicate speed and link status
v Port status LEDs–40 LEDs (green/amber) to indicate status for each port
v One power supply status LED on each power supply, to the left of the ON/OFF
© Copyright IBM Corp. 2008
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