公开(公告)号：US08929186B1

公开(公告)日：2015-01-06

申请号：US13763972

申请日：2013-02-11

申请人： Western Digital Technologies, Inc.

发明人： Abhimanyu Sharma ,  Poornima Nookala ,  Zhaobin Zhu

IPC分类号： G11B7/00 ,  G11B7/12 ,  G11B7/24 ,  G11B13/04

CPC分类号： G11B5/012 ,  G11B2005/0021

摘要： A disk drive is disclosed comprising a head actuated over a disk, wherein the head comprises a laser operable to heat the disk while writing data to the disk. A laser power of the laser is initialized, and a test pattern is written to the disk. The test pattern is read from the disk to generate a read signal, and a quality metric and a track width of the test pattern is measured based on the read signal. The laser power is adjusted and the process is repeated until at least one of the quality metric substantially matches a target value and the track width substantially matches a track width threshold.

摘要翻译： 公开了一种磁盘驱动器，其包括在磁盘上致动的磁头，其中磁头包括可操作以在将数据写入磁盘的同时加热磁盘的激光器。 初始化激光器的激光功率，并将测试图案写入磁盘。 从盘读取测试图案以产生读取信号，并且基于读取信号测量测试图案的质量度量和轨迹宽度。 调整激光功率并重复该过程，直到质量度量中的至少一个基本上与目标值匹配并且轨道宽度基本上与轨道宽度阈值相匹配。