Supermicro 7044H-32R, User Manual

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Chapter 3: System Interface
3-3
Power Fail: Indicates a power supply module has failed. This should be
accompanied by an audible alarm. A backup power supply module will take the
load and keep the system running but the failed module will need to be replaced.
Refer to Chapter 6 for details on replacing the power supply. This LED should be
off when the system is operating normally.
3-4 SAS/SATA Drive Carrier LED
Each SAS/SATA drive carrier has a green LED. When illuminated, this green
LED (on the front of the drive carrier) indicates drive activity. A connection to the
Serial ATA backplane enables this LED to blink on and off when that particular
drive is being accessed.
Note: The second LED on the SAS/SATA carriers is not used.