Chapter 3: System Interface
3-3
3-4
SCSI Drive LEDs
Each SCSI drive carrier has two LEDs.
!
Green:
The green SCSI drive LED indicates drive activity. This LED should
blink on and off when that particular drive is being accessed.
!
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.
3-5
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.
!
Green:
When green, the unit has power applied to it and is operating
normally.
!
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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