To Locate Controller Task In Storage Management
In the Server Administrator window, under the system tree, expand Storage to display the controller objects.
Select a controller object on which you want to enable the revertible hot spare task.
Click Information/Configuration on the controller Properties page.
From the Controller Task drop-down list box, select Change Controller Properties and click Execute.
NOTE: The Rebuild rate for Revertible Hot Spare is the same as that defined for the controller.