SUPER MICRO Computer 6014H-8 - Manual (Page 31)

Chapter 3: System Interface
3-3
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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.
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Green: When illuminated, the green LED on the front of a 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 (standard on the 6014H-8/6014H-
82/6014H-X8) activates the red LED, which indicates a drive failure. If one
of the SCSI drives fail, you should be notified by your system management
software. Please refer to Chapter 6 for instructions on replacing failed
SCSI drives.