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Chapter 3: System Interface
3-3
HDD: Indicates IDE channel activity. On the 1020S-8, this light indicates
SCSI and/or CD-ROM drive activity when fl ashing.
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
Each 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: The SAF-TE compliant backplane activates the red LED to indicate a
drive failure. 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.