If you do not use a multipath driver, any host applications that are currently using the volume must be shut down. This action prevents application errors when the I/O path changes.

About this task

You can change controller ownership for one or more volumes in a pool or volume group.

Steps

From the Manage page, select the storage system that contains the volumes for which you want to change the controller ownership.
Select Provisioning > Manage Volumes.
Select any volume, and then select More > Change ownership.

The Change Volume Ownership dialog box appears. All volumes on the storage system appear in this dialog box.
Use the Preferred Owner drop-down list to change the preferred controller for each volume that you want to change, and confirm that you want to perform the operation.

Results

The system changes the controller ownership of the volume. I/O to the volume is now directed through this I/O path.
The volume might not use the new I/O path until the multipath driver reconfigures to recognize the new path.

This action usually takes less than five minutes.