Chapter 3: System Interface
3-3
HDD: Indicates IDE channel activit y. On the 1020C-3 this light indicates
SAS and/or CD-ROM drive activity when fl ashing.
Power: Indicates power is being suppli ed to the system's power supply
units. This LED should normally be illuminated when the system is operating.
Each SAS drive carrier has two LEDs.
Green: When illuminated, the green LED on the front of the SAS drive car-
rier indicates drive activity. A connection to the SAS backplane enables this LED
to blink on and off when that particular drive is being accessed.
Red: The 1020C-3 features a SES2 compliant backplane that activates the
red LEDs, which indicate a drive failure. Please refer to Chapter 6 for instructions
on replacing failed SAS drives.