Chapter 3: System Interface
3-3
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Overheat: Indicates an overheat condition in the chassis. This may
be caused by cables obstructing the airflow in the system or the ambient
room temperature being too warm. You should also check to make sure
that the chassis covers are installed and that all fans are present and
operating normally. Finally, verify that the heatsinks are installed properly
(see Section 5-5 and Figure 5-4).
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Power Fail: Indicates a power supply fan has failed. The power
supply will continue to operate with a secondary backup fan but will need
to be replaced. Refer to Chapter 6 for details on replacing the power
supply. This LED should be off when the system is operating normally.
3-4
SCSI Drive Carrier LEDs
Each SCSI drive carrier has two LEDs.
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Green:
When illuminated, the green LED on the front of the SCSI drive
carrier indicates drive activity. A connection to the SCSI SCA backplane
enables this LED to blink on and off when that particular drive is being
accessed.
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Red: A SAF-TE compliant backplane is needed to activate the red
LEDs, which indicate a drive failure. A SAF-TE compliant SCSI backplane is
not included on the 7042M-6, so these LEDs will always remain off. Please
refer to Chapter 6 for instructions on replacing failed SCSI drives.
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