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. |
2 |
Select Yes. |
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. |
2 |
Use the Controller >> Change Mode option to change the controller to Active Mode. |
3 |
Use the Storage Subsystem >> Redistribute Logical Drives to move the formerly owned logical drives back to this controller owner. |