IBM 2498-B40 User Guide - Page 49

Using and maintaining the switch, Powering the switch on and off, Interpreting LEDs

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Chapter 3. Using and maintaining the switch This chapter provides information about operating and maintaining the switch and includes these topics. v "Powering the switch on and off" v "Interpreting LEDs" v "POST and boot specifications" on page 26 v "Interpreting POST results" on page 27 v "SAN48B-5 maintenance" on page 27 v "SAN48B-5 management" on page 28 Powering the switch on and off Complete the following steps to power the switch on. 1. Connect both power cords to the power connectors on the power supplies and to separate power sources. 2. 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 can take several 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. Attention: Power is still supplied to the switch if either of the two power cords are connected. To fully remove power from the switch, both power cords must be disconnected. Interpreting LEDs 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. Flashing lights may be slow, fast, or flickering. The lights are green or amber. Sometimes, the LEDs flash either of the colors during boot, POST, or other diagnostic tests. This is normal; it does not indicate a problem unless the LEDs do not indicate a healthy state after all boot processes and diagnostic tests are complete. LED locations The port side of the switch has the following LEDs (see Figure 11 on page 24). v One system status LED (above) on the left side v One power LED (below) on the left side v Two Ethernet Port LEDs (both green) © Copyright IBM Corp. 2011 23

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Chapter 3. Using and maintaining the switch
This chapter provides information about operating and maintaining the switch and
includes these topics.
v
“Powering the switch on and off”
v
“Interpreting LEDs”
v
“POST and boot specifications” on page 26
v
“Interpreting POST results” on page 27
v
“SAN48B-5 maintenance” on page 27
v
“SAN48B-5 management” on page 28
Powering the switch on and off
Complete the following steps to power the switch on.
1.
Connect both power cords to the power connectors on the power supplies and
to separate power sources.
2.
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 can take several
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.
Attention:
Power is still supplied to the switch if either of the two power cords
are connected. To fully remove power from the switch, both power cords must be
disconnected.
Interpreting LEDs
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.
Flashing lights may be slow, fast, or flickering. The lights are green or amber.
Sometimes, the LEDs flash either of the colors during boot, POST, or other
diagnostic tests. This is normal; it does not indicate a problem unless the LEDs do
not indicate a healthy state after all boot processes and diagnostic tests are
complete.
LED locations
The port side of the switch has the following LEDs (see Figure 11 on page 24).
v
One system status LED (above) on the left side
v
One power LED (below) on the left side
v
Two Ethernet Port LEDs (both green)
© Copyright IBM Corp. 2011
23