Patent ID: 8094403
Filing Date: 2012-01-10
Classification: G11B

Abstract:
1. A hard-disk drive (HDD), comprising: an enclosure; a magnetic-recording head; a magnetic-recording disk rotatably mounted on a spindle; a drive motor mounted in said enclosure, said drive motor having a motor shaft attached to said spindle for rotating said magnetic-recording disk; a voice coil motor configured to move said magnetic-recording head to access portions of said magnetic-recording disk; a disk controller configured to communicate with the magnetic-recording head and the voice coil motor, wherein the disk controller is configured to instruct the magnetic-recording head to write data to the magnetic-recording disk in one or more shingled tracks; and a current adjustment component, wherein the current adjustment component, in response to a servo controller determining that a present position of the magnetic-head head is not in a desired position, changes an amount of current supplied to the magnetic-recording head causing a change in the strength of a magnetic write field produced by the magnetic-recording head, and wherein the change in the strength of the magnetic write field causes data, written by the magnetic-recording head, to be located at a desired location on the magnetic-recording disk, wherein the magnetic-recording head writes data to the magnetic-recording disk in one or more shingled tracks using only a corner of the magnetic-recording head.