Silicon Graphics Origin 300, User Manual

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Powering Your System On and Off
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Preparing to Power On
Warning:
The rackmount system operates on 200-240 Vac. Use extreme caution
when you work near this voltage.
To prepare to power on the system, perform the following tasks:
• Confirm that the power cables between the following components are secure:
– Between the power distribution unit (PDU) and the external power receptacle.
– Between the PDU and the following components: Origin 300 base module(s),
AC-powered NUMAlink module, USB hub, TP900 storage module(s), power
bay, power strip, L2 controller power supply, and Myrinet-2000 switch.
– Between the power bay and the following modules: DC-powered NUMAlink
module, PCI expansion module(s), and L2 controller module (refer to
Figure 3-21).
Note: When the system contains an AC-powered NUMAlink module, the L2
controller does not receive power from a power bay; instead, it receives power from
a power supply. This power supply receives AC voltage from a PDU or power strip
and converts the voltage to 48 Vdc, which is the input voltage that the L2 controller
requires.
Figure 3-21 shows the PDU and power bay connections to the components within a
system that contains a DC-powered NUMAlink module.
• Confirm that the cables between the L2 controller and the following components are
secure:
– NUMAlink module (refer to Figure 3-22)
– USB hub
Figure 3-22 shows how the system components connect to the L2 controller.
• Ensure that the power switch on each DC-powered NUMAlink and PCI expansion
module that you want to power on is set to the On (
1
) position. The power switch is
located in the upper-left corner of the module (refer to Figure 3-23). This switch
enables the L1 controllers of the NUMAlink module and PCI expansion modules to
power on after you turn on the circuit breaker of the PDU.
Note: The Origin 300 base and AC-powered NUMAlink modules do not have a
power switch; when the PDU circuit breaker is on, their L1 controllers are on.