External Components; Front Panel Components - Silicon Graphics Origin 3900 User Manual

7: R-brick

External Components

Front Panel Components

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This section describes the external components that are located on the front and rear
panels of the R-brick.
The R-brick contains the following front-panel components (see Figure 7-3):
• 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 or at the L2 controller touch display.
• Three LEDs:
– On/Off switch LED. This LED illuminates green when the R-brick internal
components are on.
– 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 not operating.
• Fans. Two hot-swappable fans provide N+1 redundant cooling.
Warning:
To prevent personal injury, or damage to the R-brick, the
hot-swappable fans can be installed only by a trained SGI system support
engineer (SSE).
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