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Overheat/Fan Fail/UID LED
When this LED fl ashes it indicates a fan failure. When continuously on (not fl ashing)
it indicates an overheat condition, which may be caused by cables obstructing the
airfl ow in the system or the ambient room temperature being too warm.
Check the routing of the cables and make sure that all fans are present and op-
erating normally. Also check to make sure that the air shrouds are installed and
that the top cover is on. Finally, verify that the heatsinks are installed properly.
This LED will remain fl ashing or on as long as the overheat condition exists. When
used with a UID-compatible motherboard, the UID function is used to turn on or off
the blue light function of the the LED. Once the blue light is activated through the
system software, the unit can be easily located in very large racks and server banks.
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Hard Drive Carrier LEDs
Each hard drive carrier has two LEDs.
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Green: When illuminated, the green LED on the front of the drive carrier in-
dicates drive activity. A connection to the SATA backplane enables this LED to
blink on and off when that particular drive is being accessed.
•
Red: The red LED indicates two states. When blinking, it indicates the drive
is rebuilding. When solid, it indicates a drive failure. If a drive fails, you should
be notifi ed by your system management software. Please refer to Chapter 6 for
instructions on replacing failed drives.
Chapter 3: System Interface
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