Problem and solution when the controller enclosure alarm indicator is on but no alarm is reported on the storage system

You can perform the following operations when the controller enclosure alarm indicator is on but no alarm is reported on the storage system:
1. Fault location and rectification
a. Log in to the storage system and check whether alarm information is reported.
b. Query the SES log and confirm the cause and last time when the alarm indicator is on.
c. Check the SES and message log to find why the indicator is on.
2. Fault Diagnosis
a. Search start led(0x0) (off) and (0x1) (on) in the SES log. Verify the last time when the alarm indicator is on.
b. Check in the historical alarms whether the alarm is recovered when the indicator is on.
c. Analyze turn-off and turn-on records in the message logs of controllers A and B. Search keyword light.
d. If the alarm is recovered and the controller does not send a turn-off command, send the command manually.
3. Solution
Send the mml:dev sesstartlight 0 command to the controller whose indicator is turned on and then not off.
Note: The controller enclosure alarm indicator follows the same rule as the disk indicator does that the same indicator is turned on and then off.
The above method is only applicable to the situation where the controller enclosure alarm indicator is on.

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