Restarting or shutting down controllers HP MSA Series

 

Each controller module contains a Management Controller processor and a Storage Controller processor. When necessary, User can restart or shut down these processors for one controller or both controllers.

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Restarting controllers

Perform a restart when the SMU informs user that user has changed a configuration setting that requires a restart or when the controller is not working properly.

When user restart a Management Controller, communication with it is lost until it successfully restarts. If the restart fails, the Management Controller in the partner controller module remains active with full ownership of operations and configuration information.

When user restart a Storage Controller, it attempts to shut down with a proper failover sequence. This sequence includes stopping all I/O operations and flushing the write cache to disk. At the end, the controller restarts. Restarting a Storage Controller restarts the corresponding Management Controller.

CAUTION: If user restart both controller modules, all users will lose access to the system and its data until the restart is complete.

NOTE: When a Storage Controller is restarted, current performance statistics that it recorded are reset to zero, but historical performance statistics are not affected. In a dual-controller system, disk statistics may be reduced but are not reset to zero, because disk statistics are shared between the two controllers.

To perform a restart

1.    Perform one of the following:

·         In the banner, click the system panel and select Restart System.

·         In the System topic, select Action > Restart System.

The Controller Restart and Shut Down panel opens.

2.    

3.    

4.    Select the Restart operation

5.    Select the controller type to restart: Management or Storage.

6.    Select the controller module to restart: Controller A, Controller B, or both.

7.    Click OK. A confirmation panel appears.

8.    Click OK to continue. Otherwise, click Cancel. If user clicked OK, a message describes restart activity

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Shutting down controllers

Perform a shut down before user remove a controller module from an enclosure, or before user power off its enclosure for maintenance, repair, or a move. Shutting down the Storage Controller in a controller module ensures that a proper failover sequence is used, which includes stopping all I/O operations and writing any data in write cache to disk. If user shut down the Storage Controller in both controller modules, hosts cannot access system data and the SMU will be unavailable.

CAUTION: User can continue to use the CLI when either or both Storage Controllers are shut down, but some information might not be available.

To perform a shut down:

1.    . Perform one of the following:

·         In the banner, click the system panel and select Restart System.

·         In the System topic, select Action > Restart System.

The Controller Restart and Shut Down panel opens.

2.    Select the Shut Down operation, which automatically selects the Storage controller type.

3.    Select the controller module to shut down: Controller A, Controller B, or both

4.    Click OK. A confirmation panel appears.

5.    Click OK to continue. Otherwise, click Cancel. If user clicked OK, a message describes shutdown activity.