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

Claim 0:
1. A data storage device comprising:
a data storage disc comprising:
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;

an actuator arm assembly supporting a head pair configured for interaction with the top and bottom surfaces;
a servo clock configured to determine a top time at which the head pair encounters the top surface boundary of the servo wedge and a bottom time at which the head pair encounters the bottom surface boundary of the servo wedge during a disc read/write interaction; and
a feedback and control system configured to:
determine an operation time difference between the top and bottom times;
compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and
move the actuator arm assembly to the target vertical position based on a comparison of the operation time difference and the certification time difference.