Supermicro SUPERSERVER 6011H, User Manual, Page: 29 / 112

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
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 6011H.) 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 Power Supply Switch
An on/off switch is located on the back of the power supply. This switch
should normally be on at all times. Turning this switch to the off position
removes both the main and standby power from the system, as opposed to
the power button located on the control panel on the front of the chassis.
3-6 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 near the JA1 SCSI connector.