Controller Failure

Symptom

Log in to the DeviceManager and choose System > Hardware > Devices.

• For a 2 U controller enclosure, click on the main page to switch to the rear view of the storage device. On the rear view of the storage device, click the controller in the red square. Health Status of the controller is Faulty.
• For a 4 U controller enclosure, on the front view of the storage device, click the controller in the red square. Health Status of the controller is Faulty.

The controller Alarm indicator on the storage device is steady yellow. Figure 5-1, Figure 5-2, and Figure 5-3 show the location of the controller Alarm indicator.

Figure 5-1 Location of the controller Alarm indicator on a 2 U controller enclosure (applicable to Dorado 3000 V6)

Figure 5-2 Location of the controller Alarm indicator on a 2 U controller enclosure (applicable to Dorado 5000 V6 and Dorado 6000 V6)

Figure 5-3 Location of the controller Alarm indicator on a 4 U controller enclosure (applicable to Dorado 8000 V6 and Dorado 18000 V6)

Alarm Information

On the Alarms and Events page, click the Current Alarms tab. The alarm Controller Is Faulty is displayed on the tab page.

Possible Causes

The controller is faulty.

Impact

Controller faults may deteriorate system performance and reliability.

Fault Diagnosis

Figure 5-4 Troubleshooting flowchart for a controller failure

Procedure

1. Check whether the controller Alarm indicator on the storage device is steady yellow.
   • If yes, go to 2.
   • If no, keep the fault environment intact and contact technical support engineers.

2. Replace the faulty controller.

   For details about how to replace a faulty controller, see the Parts Replacement of the corresponding product model.

3. Check whether the controller Alarm indicator is steady off and Health Status of the controller on the DeviceManager is Normal.
   • If yes, the procedure is complete.
   • If no, keep the fault environment intact and contact technical support engineers.

Suggestion and Summary

Failure of one controller causes the storage system performance to deteriorate and increases the risk of data loss. In this case, stop the operations of reading or writing a large amount of data and recover the storage system as soon as possible.