Supermicro SUPERSERVER 6021H, User Manual, Page: 29 / 112

Chapter 3: System Interface
3-3
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Power Fail: Indicates a power supply unit has failed and will need
replaced. Refer to Section 6-5 for details on replacing power supply units.
This LED should be off when the system is operating normally.
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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
A 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 LED
to indicate a drive failure. (A SAF-TE compliant SCSI backplane is optional
on the 6021H.) If one of the SCSI drives fail, you should be notified by your
system management software. Please refer to Section 6-4 for instructions
on replacing failed SCSI drives.
3-5 Motherboard LED
There is only one LED on the motherboard. When illuminated, it indicates
that system power is present on the motherboard. This LED is located in
the corner of the P3TDER near the JA1 SCSI connector.