A computer-implemented method according to one embodiment includes identifying an extent to be relocated within a storage environment, determining a current workload of each of a plurality of storage drives within the storage environment, determining current performance capabilities of each of a plurality of backend storage controllers associated with the plurality of storage drives within the storage environment, and moving the extent to one of the plurality of storage drives, based on the current workload for each of the plurality of storage drives and the current performance capabilities of the plurality of backend storage controllers.