Chapter 3: System Interface
3-3
Power:
Indicates power is being supplied to the system's power supply units.
This LED should normally be illuminated when the system is operating.
3-4
SCSI Drive Carrier LEDs (5025M-4 only)
A SCSI drive carrier has two LEDs.
Green:
When illuminated, the green LED on the front of the SCSI drive car-
rier 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.
Red:
A SAF-TE compliant backplane is needed to activate the red LED, which
indicates a drive failure. (A SAF-TE compliant SCSI backplane is standard on the
5025M-4.) If one of the SCSI drives fail, you should be notifi ed by your system
management software. Please refer to Chapter 6 for instructions on replacing failed
SCSI drives.
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