Hitachi Global Storage Technologies Netherlands B.v.

Guo Mian

Quan-chiu Harry Lam

Kris Victor Schouterden

Christopher David Wiederholt

Douglas Michael Zuercher

Joseph Silva

Indukumar Kalahasthi

Gary Sui

A method is presented for writing data to a surface of a magnetic disk in a disk drive. The method includes determining a number of sector groups into which sectors of the data to be written will be grouped, loading registers with current values, kick-latching values, and precompensation values for each of said sector groups, and applying the current values, kick-latching values, and precompensation values for each of the sector groups to the write head while writing data to the sector groups of the recording media.

Method for precompensation/write-current latching to improve error rate

A data storage apparatus includes a magnetic medium having a top recording layer of hard magnetic material for perpendicularly storing magnetic data and a bottom underlayer of soft magnetic material, a read head for reading magnetic data from a recorded portion of the recording layer, a stabilizer for magnetically stabilizing a portion of the underlayer directly below the recorded portion simultaneously while the read head is reading magnetic data from the recorded portion and the read head and the stabilizer being separate structures.

Perpendicular recording and read head assembly with in situ stand alone stabilizer for a magnetic medium underlayer

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Fremont, CA, United States of America

Guo Mian