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Chapter 3: System Interface
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SCSI Drive LEDs
Each SCSI drive carrier has two LEDs.
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Green: The green SCSI drive LED indicates drive activity. This LED
should blink on and off when that particular drive is being accessed.
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Red: If the red LED is illuminated, the drive has experienced a fault or
has crashed. Please refer to Chapter 6 for instructions on replacing failed
SCSI drives.
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Power Supply LEDs
Each of the three units comprising the power supply has a single LED that
can be illuminated either as green or amber.
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Green: When green, the unit has power applied to it and is operating
normally.
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Amber: If the LED is amber, it indicates that no power is being applied
to that unit. If system power has been turned off this is normal, however if
the system is powered on and running an amber LED most likely indicates a
failed power unit. First check to make sure the power cord for that unit is
plugged in. If it is, then refer to Chapter 6 for instructions on replacing the
unit. The power unit's fan may continue to run at low speed even if the unit
has failed or has been turned off.
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Motherboard LED
There is only one LED on the motherboard. When illuminated, it indicates
that system power is present on the motherboard. This LED is located just
below the PWR_SEC connector, which is at the top right corner of the
board when installed in the chassis. It provides the same indication as the
Power LED on the front control panel.
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