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Chapter 3: System Interface
3-3
airfl ow in the system or the ambient room temperature being too warm. Check the
routing of the cables and make sure all fans are present and operating normally.
You should also check to make sure that the chassis covers are installed. Finally,
verify that the heatsinks are installed properly (see Chapter 5). This LED will remain
fl ashing or on as long as the indicated condition exists.
Power Fail
Indicates a power supply fan has failed. The power supply module has a redundant
backup fan that will increase its rpm to compensate, but the power module should
be replaced as soon as it's convenient.
3-4 Drive Carrier LEDs
Note: the LEDs of some drive carriers may not function depending on the number
of drives that are supported by the serverboard and/or backplane.
• Green: When illuminated, the green LED on the front of the hard drive carrier
indicates drive activity. A connection to the drive backplane enables this LED to
blink on and off when that particular drive is being accessed.
• Red: The backplane activates the red LED to indicate a drive failure. If one of
the hard drives fail, you should be notifi ed by your system management soft-
ware. Please refer to Chapter 6 for instructions on replacing failed hard drives.