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External Components
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Rear Panel Components
The CR-brick has the following rear panel items (see Figure 5-4):
•
Power switch.
Move the power switch to the
I
position to power on the
L1 controller within the CR-brick, and to the
0
position to power off the
L1 controller. Powering on the L1 controller illuminates the 12-VDC LED green.
•
Two PWR (power) connectors.
These connect the CR-brick to the power bay, to
provide 12-VDC and 48-VDC power to the CR-brick.
•
48-VDC and 12-VDC LEDs.
The power switch must be in the ON (
I
) position for
these LEDs to be on. The 12-VDC LED illuminates green when the L1 controller is
powered on and operating, and the 48-VDC LED illuminates green when the rest of
the CR-brick internal components are powered on and operating. You can power on
the internal components by pressing the On/Off switch (brick reset button) on the
L1 controller panel.
•
NUMAlink connectors A, F, G, H (or Network Interface (NI) connectors).
These
upper and lower connectors attach the CR-brick to an R-brick or to other CR-bricks.
These are connected with a NUMAlink cable at 3.2 GB/s in each direction.
•
Heartbeat LEDs.
The four heartbeat LEDs turn on and off at a preset rate when the
Linux operating system is running. The heartbeat LEDs indicate that the processor
is functioning and can process an interrupt from the operating system. The LEDs for
each node are arranged in pairs. The lower LED represents the processor 0
heartbeat, and the upper LED represents the processor 1 heartbeat.
•
Node 1 and Node 3 XIO (II - I/O Interface) connectors.
These Xtown2 connectors
connect a CR-brick to an IX-brick or PX-brick. These are connected with a
NUMAlink cable at 1.2 GB/s in each direction.
•
Console connector.
This is an RS-232 serial port (console and diagnostic port) that
connects the L1 controller within a CR-brick to a system console. The CR-brick L1
controller communicates with a system console through the console connector,
which provides a serial bus that uses the standard RS-232 protocol.
•
L1 host port connector.
This universal serial bus (USB) connector connects to the L1
controller.
•
Processor status LEDs.
The 32 processor status LEDs (8 for each processor) are used
by SGI service engineers for diagnostic purposes.
•
Link and XIO connector LEDs.
Each connector has an LED that illuminates yellow
and an LED that illuminates green. One LED illuminates yellow to indicate that
both the CR-brick and the brick to which it is connected are powered on. The other
Summary of Contents for SGI Altix 3700 Bx2
Page 1: ...SGI Altix 3700 Bx2 User s Guide Document Number 007 4377 002 ...
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Page 70: ...46 007 4377 002 3 System Overview Figure 3 1 SGI Altix 3700 Bx2 Series Systems ...
Page 85: ...Tall Rack 40U 007 4377 002 61 Figure 4 1 Tall 40U Rack ...
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Page 90: ...66 007 4377 002 5 CR brick Figure 5 1 Front and Side View of CR brick ...
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