Patent ID: 7215507

Claim:
A disk drive assembly comprising: a cover plate; a base plate; a spindle that rotates about a longitudinal axis; a data storage disk having an outer radial disk edge, an inner radial disk edge and a disk surface, wherein the disk is mounted on the spindle and the disk surface is perpendicular to the longitudinal axis; a slider assembly that includes a transducer head that reads from and writes to the disk surface; an actuator assembly that positions the slider assembly over concentric tracks disposed at different radial positions on the disk surface; and an enclosure element having a large portion and a depressed contoured portion, wherein the enclosure element is provided by the cover plate or the base plate, the large portion covers more than three times the amount of the disk surface that is covered by the depressed contoured portion, and the depressed contoured portion is disposed upstream of the actuator assembly, is disposed closer than the large portion to the disk surface, and provides airflow modification of the airflow impinging on the actuator assembly thereby reducing cross-track motion of the transducer head and reducing track misregistration.