Write jog value determination for a disk drive

Details Write jog value determination for a disk drive Write jog value determination for a disk drive

2011-08-16

2011-08-16

Nguyen, Hoa T (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

08000053

ABSTRACT:
A disk drive for determining a write jog value is disclosed. The disk drive comprises: a disk; a head including a reader and a writer; and a processor. The processor controls operations in the disk drive including: commanding the reader to track follow on a first track, wherein the writer is located over an uncalibrated track position; commanding the writer to write a first test pattern on a section of the disk; commanding the writer to move by a plurality of step amounts to write a plurality of test patterns; commanding the reader to move by a second plurality of step amounts to read the plurality of test patterns; determining a reader signal value associated with each test pattern; determining the uncalibrated track position based on the read signal values; and determining the write jog value based on the distance between the first track and the uncalibrated track position.

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