Silicon Graphics Origin 3900, User Manual

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176 007-4653-001
12: InfinitePerformance Graphics Components
V-brick
The V-brick is a 4U I/O expansion brick that provides four half-height XIO slots. The
V-brick can support one or two V12 VPro graphics boards. Each board requires two XIO
slots. When the V-brick is configured with one V12 graphics board, the board resides in
slots 1 and 2 (the top two slots) and the bottom two slots are covered with blanking
plates. When the V-brick contains two V12 VPro graphics boards, the V-brick must be
dual ported (each XIO port of the V-brick must connect to an IP53 node board).
Front Panel Components
The V-brick contains the following front-panel components (see Figure 12-2):
• 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 V-brick internal
components. You can also turn on the V-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 V-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 V-brick is
still operating.
– Failure LED. This LED illuminates red to indicate that a system failure has
occurred and the V-brick is down.
• Fans. Three hot-pluggable fans provide N+1 redundant cooling.