Patent ID: 11935571
Assignee: MARVELL ASIA PTE LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for writing repeatable run-out data, representing a recurring contribution to position error, to multiple surfaces of a rotating magnetic storage medium in a storage device having two read channels, the method comprising:
processing servo signals from a first track on a first storage medium surface of the storage device, to generate first positioning signals for positioning a first read head relative to the first track for writing first repeatable run-out data;
processing servo signals from a second track, to generate second positioning signals for positioning a second read head relative to the second track for writing second repeatable run-out data;
establishing a first recurring servo-gating signal for a first read channel at a successive fixed interval, based on rotation speed of the rotating magnetic storage medium, from an initial servo sync mark; and
writing the first repeatable run-out data to servo wedges of the first track according to the first positioning signals, and the second repeatable run-out data to servo wedges of the second track according to the second positioning signals, using a single write data channel of the storage device.