Hitachi Global Storage Technologies Netherlands B.v.

Joseph Silva

Quan-chiu Harry Lam

Kris Victor Schouterden

Christopher David Wiederholt

Douglas Michael Zuercher

Thomas E Stanley

Indukumar Kalahasthi

Guo Mian

Hin-Ching Hubert Chan

Yue Ming Tang

Values for baseline write current and/or kick amplitudes from the baseline are determined for each head for each disk sector it writes and stored in a table. The values are determined so as to achieve a desired overwrite level. During operation, the values are looked up and applied to the heads depending on the particular sector being written. The values may be dynamically varied for temperature deviations from a baseline value.

System and method for controlling write to minimize ATI and squeeze effects

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 method for determining a write inhibit threshold value for at least one head of a file during the file manufacturing process is disclosed. The method includes qualifying a test track for use in the determining of the write inhibit threshold value. The method further includes performing a write inhibit threshold determination process to obtain the write inhibit threshold value and then storing the write inhibit threshold value for use with the at least one head of the file.

Method for determining unique write inhibit thresholds for individual heads for maximizing file servo performance

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Hollister, CA, United States of America

Joseph Silva