Use the Change Ownership/Preferred Path option to change the for a particular or .
Changing controller ownership of a logical drive changes the preferred controller ownership of the logical drive. The preferred controller owner of a logical drive is listed under Logical Drive>> Change >> Ownership/Preferred Path with the designation of “preferred.” A dot usually appears next to the menu item. (This information is also shown in the logical drive properties after running a show logical drives command from the Script Engine.) In some situations, you can temporarily move the logical drives to the other controller. In these cases, the association dot identifies the controller that currently owns the logical drives (the ) and the “preferred” designation to show the preferred owner.
You can change the controller ownership of a or a . You cannot directly change the controller ownership of a because the flashcopy logical drive inherits the controller owner of its associated .
The controller owner of the in a relationship determines the controller owner of the associated . For example, controller A owns the primary logical drive in the primary . In this case, controller A then owns the associated secondary logical drive in the secondary storage subsystem. Controller ownership changes of the primary logical drive cause a corresponding controller ownership change of the secondary logical drive.If an array contains a local secondary logical drive and controller ownership is changed, the secondary logical drive is automatically transferred back to its original controller owner on the first write operation. You cannot change the controller ownership of a secondary logical drive by using this option.
During a , the same controller must own both the and the . Sometimes both logical drives do not have the same preferred controller when the VolumeCopy starts. Therefore, the ownership of the target logical drive is automatically transferred to the preferred controller of the source logical drive. When the VolumeCopy is completed or is stopped, ownership of the target logical drive is restored to its preferred controller. If ownership of the source logical drive is changed during the VolumeCopy, ownership of the target logical drive is also changed. Under certain operating system environments, it might be necessary to reconfigure the multi-path host driver before an I/O path can be used. (Some require an edit to recognize the I/O path. Consult your driver's documentation for more information.)
Attention:
Possible loss of data access – If you do not use a multi-path driver, shut down any host applications that are currently using the array. This action prevents application errors when the I/O path changes.
Note:
The logical drive might not use the new I/O path until the multi-path driver reconfigures to recognize the new path. This action usually takes less than five minutes.
Important:
Changing ownership at the array level causes every logical drive in that array to transfer to the other controller and use the new I/O path. If you do not want to set every logical drive to the new path, change ownership at the logical drive level instead.
Note:
The array might not use the new I/O path until the multi-path driver reconfigures to recognize the new path. This action usually takes less than five minutes.