External Components - Silicon Graphics Origin 3900 User Manual

3: Cx-brick

External Components

58
The Cx-brick is a 4U-high brick that contains the following front-panel items (see
Figure 3-3):
• L1 display is a 2-line by 12-character liquid crystal display (LCD) that displays
status and error messages that the L1 controller generates.
• On/Off button with LED enables you to manually power on and power off the
Cx-brick.
• LEDs:
• On/Off button LED illuminates green when the internal components are
powered on.
• Service required LED illuminates orange to indicate that an item is not
functioning properly (for example, a fan is off), but the Cx-brick is still
operating.
• Failure LED illuminates red to indicate that a failure has occurred and the
Cx-brick is down.
• Reset switch resets the Cx-brick internal processors and ASICs. This reset will cause
a memory loss. (See non-maskable interrupt [NMI] to perform a reset without
losing register data.)
• NMI switch resets the Cx-brick internal processors and ASICs and writes the
contents of the registers and memory to a /var/adm/crash file. (This switch is not
used by the memory-only Cx-brick.)
• Three fans provide N+1 redundant cooling for the brick.
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