Changing a Controller Mode

Use this option to place a controller in Active or Passive mode.

Note: The Active option is only available for a selected controller that is currently Passive. Conversely, the Passive option is only available for a selected controller that is currently Active.

Caution: If you do not have a multi-path driver installed on the application host and you change a controller from Active to Passive mode while the application is using the associated logical drives, application errors will occur.

Important: If you change an Active controller to Passive mode and the other controller of the pair is already in Passive mode, an error is displayed and the operation will not complete. At least one controller in the Storage Subsystem must be in Active mode.


How to Change a Controller to Active Mode

1
Select the controller in the Physical View; then, select either the Controller >> Change Mode >> Active pull-down menu option, or Change Mode >> Active from the right-mouse pop-up menu.

Result: The Confirm Change to Active Mode dialog is displayed.
2
Select Yes.

Result: The Controller changes to Active mode. The controller icon in the Physical View changes to Active.

Important: Arrays and associated logical drives are not moved to the new controller automatically.
3
Move one or more arrays and their associated logical drives to the newly active controller.

If... Then...
The newly active controller previously owned arrays and their associated logical drives (before a previous switch to Passive mode) Use the Storage Subsystem >> Redistribute Arrays option to move the arrays and logical drives originally owned by this controller back to this controller.
The newly active controller never previously owned arrays and their associated logical drives Use the Array >> Change Ownership option to move one or more arrays to this controller

-OR-

Create new arrays and logical drives and specify this controller as the owner.

How to Change a Controller to Passive Mode

1
Select the controller in the Physical View; then, select either the Controller >> Change Mode >> Passive pull-down menu option, or Change Mode >> Passive from the right-mouse pop-up menu.

Result: The Confirm Change to Passive Mode dialog is displayed.
2
Select Yes.

Result: The controller changes to Passive mode. The controller icon in the Physical View changes to Passive . Any arrays and their associated logical drives that were owned by this controller change ownership to the other controller, and all I/O to these logical drives is automatically rerouted by the multi-path driver on the application host.
3
If you do not have a multi-path driver installed on the application host, make the appropriate host operating system modifications so that the applications can recognize the new I/O path.