Procedure that achieves a target areal density for a heat-assisted recording medium

摘要

A recording head writes data to a recording medium for one or more iterations. Each iteration involves adjusting a linear data density, a track pitch, and a laser power. From the iterations, a selected linear data density, a selected track pitch, and a selected laser power are determined that together achieve a target areal density and are used to write user data to the recording medium during operation of a hard disk drive.

主权项

1. A method comprising:
determining an initial value of laser power based on incrementing the laser power while recording a signal to a heat-assisted recording medium, the initial value based on a power level that results in saturation when reading back the signal; recording data to the heat-assisted recording medium for two or more iterations, each iteration involving the adjustment of, in any order, linear data density, track pitch, and the laser power when writing data to a single track of the recording medium to achieve a target bit error rate for each iteration; determining, from the iterations, a selected linear data density, a selected track pitch, and a selected laser power that together achieve a target areal density; and using the selected linear data density, the selected track pitch, and the selected laser power to write user data to the recording medium.