Disk drive calibrating a laser write power for heat assisted magnetic recording

摘要

A disk drive is disclosed comprising a head actuated over a disk, wherein the head comprises a laser for heating the disk while writing data to the disk. The disk drive receives write commands, and increases a power of the laser to a write power for heating the disk while writing data to the disk. A calibration interval is adjusted based on the power applied to the laser over time, and the write power is calibrated at the calibration interval.

主权项

1. A disk drive comprising:
a disk; a head actuated over the disk, wherein the head comprises a laser for heating the disk while writing data to the disk; and control circuitry operable to:
receive write commands;increase a power of the laser to a write power for heating the disk while writing data to the disk;measure a duration that the power is applied to the laser;adjust a calibration interval based on the duration; andcalibrate the write power at the calibration interval.