Patent ID: 11900965
Assignee: SEAGATE TECHNOLOGY LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. A data storage device comprising:
a data storage disc comprising:
a data track;
a top surface and a bottom surface, each of the top and bottom surfaces being parallel to an x-y plane; and
a servo wedge comprising:
a top surface boundary of the servo wedge; and
a bottom surface boundary of the servo wedge;
wherein the top surface boundary and the bottom surface boundary are spaced apart by a distance along the data track;

an actuator arm assembly comprising:
a first actuator arm supporting a first head configured for interaction with the top surface, the first actuator arm spaced at a Z-height from the top surface;
a second actuator arm supporting a second head configured for interaction with the bottom surface; and

a feedback and control system configured to:
employ a transfer function relating the Z-height to the distance; and
change the Z-height based on the transfer function.