Placing a Controller Offline or Online

Use the Place Offline option to place a controller in an Offline state. Use the Place Online option to put the controller back online, making it available for I/O.

Caution:

How to Place a Controller Offline

Note: This option is only available when the controller is online.

1

To take a controller offline, select it in the Physical View; then, select either the Controller >> Place Offline pull-down menu option, or Place Offline from the right-mouse pop-up menu.

Result: The Confirm Place Offline dialog is displayed.

2

Select Yes.

Result: The Place Offline operation begins. The controller icon changes to Needs Attention, Passive.

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.

How to Place a Controller Online

Note: This option is only available when the controller is offline.

1

Select the offline controller in the Physical View; then, select either the Controller >> Place Online pull-down menu option, or Place Online from the right-mouse pop-up menu.

Result: The Place Online option begins. The controller icon changes to Optimal, Passive.

2

Use the Controller >> Change Mode option to change the controller to Active Mode.

Result: The controller icon changes to Optimal, Active.

3

Use the Storage Subsystem >> Redistribute Logical Drives to move the formerly owned logical drives back to this controller owner.