Patent ID: 11862196
Assignee: TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A disk drive, comprising:
a first head for accessing a first recording surface of the disk drive and a second head for accessing a second recording surface of the disk drive; and
a controller configured to perform the steps of:
determining first and second control signals that each cause a first actuator to position the first head relative to the first recording surface, wherein the first control signal is based on a first position signal generated by the first head passing over a first servo wedge disposed on the first recording surface and the second control signal is based on a second position signal generated by the first head passing over a second servo wedge disposed on the first recording surface;
determining a feedforward value that modifies a third control signal that is determined based on a third position signal, wherein the third position signal is generated by the second head passing over a third servo wedge disposed on the second recording surface and the third control signal causes a second actuator that is coupled to the second head to position the second head relative to the second recording surface;
determining that the third position signal is generated by the second head passing over the third servo wedge; and
modifying the third control signal with the feedforward value in response to the second head passing over the third servo wedge,
wherein the feedforward value is generated based on the first and second control signals.