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Diagnosing array problems 33
Diagnosing array problems
Controller board runtime LEDs
Immediately after the server is powered up, the controller runtime LEDs illuminate briefly in a
predetermined pattern as part of the POST sequence. At all other times during server operation, the
illumination pattern of the runtime LEDs indicates the status of the controller, as described in the following
table.
LED ID Color LED name and interpretation
1 Green CR502: Expander Heartbeat LED. This LED flashes every 2 seconds during
normal operation. Abnormal conditions are indicated as follows:
• If the LED glows steadily, the expander has an internal problem.
• If the LED flashes twice per second, the NVRAM is corrupt.
In either case, the expander does not function.
2 Amber CR510: System Error LED.
3 Amber CR509: Diagnostics Error LED.
4 Amber CR500: Drive Failure LED. A physical drive connected to the controller has failed.
Check the Fault LED on each drive to determine which drive has failed.
5 Green CR508: Activity LED for SAS port 4I.
6 Green CR507: Activity LED for SAS port 3I.
7 Green CR506: Command Outstanding LED. The controller is working on a command
from the host driver.
8 Green CR505: Controller Heartbeat LED. This LED flashes every 2 seconds to indicate
the controller health.