Silicon Graphics SGI Altix 3700 Bx2, User Manual

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100 007-4377-002
8: R-brick
External Components
This section describes the external components that are located on the front and rear
panels of the R-brick.
Front Panel Components
The R-brick contains the following front panel items (as shown in Figure 8-1 on page 98):
• L1 display. The L1 display is a 55.7 mm X 32 mm backlit liquid crystal display
(LCD) that displays system messages. It displays two lines with a maximum of 12
characters on each line.
• On/Off switch with LED. Press this button to turn on the R-brick internal
components. You can also turn on the R-brick internal components at a system
console.
• Three LEDs:
– On/Off switch LED. This LED illuminates green when the R-brick internal
components are on and turns off when they are off.
– Service required LED. This LED illuminates orange to indicate that an item is
broken or not operating properly (for example, a fan is off), but the R-brick is
still operating.
– Failure LED. This LED illuminates red to indicate that a system failure has
occurred and the R-brick is down.
• Fans. Two hot-pluggable fans provide N+1 redundant cooling.