公开(公告)号：US20170092318A1

公开(公告)日：2017-03-30

申请号：US15095380

申请日：2016-04-11

Applicant: Seagate Technology LLC

Inventor： Alfredo Sam Chu ,  Drew Michael Mader ,  Wenzhong Zhu ,  Michael A. Cordle

IPC: G11B7/1267 ,  G11B20/18

CPC classification number: G11B7/1267 ,  G11B5/012 ,  G11B5/02 ,  G11B5/455 ,  G11B5/5534 ,  G11B13/08 ,  G11B20/10009 ,  G11B20/10481 ,  G11B20/10509 ,  G11B20/182 ,  G11B2005/0021

Abstract: During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.

公开(公告)号：US09589587B1

公开(公告)日：2017-03-07

申请号：US15095380

申请日：2016-04-11

Applicant: Seagate Technology LLC

Inventor： Alfredo Sam Chu ,  Drew Michael Mader ,  Wenzhong Zhu ,  Michael A. Cordle

IPC: G11B7/12 ,  G11B7/1267 ,  G11B20/18 ,  G11B5/02 ,  G11B13/08 ,  G11B5/00 ,  G11B20/10 ,  G11B5/012

CPC classification number: G11B7/1267 ,  G11B5/012 ,  G11B5/02 ,  G11B5/455 ,  G11B5/5534 ,  G11B13/08 ,  G11B20/10009 ,  G11B20/10481 ,  G11B20/10509 ,  G11B20/182 ,  G11B2005/0021

Abstract: During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.

Abstract translation: 在热辅助磁记录数据存储装置的现场操作期间，执行激光调节程序。 激光调节过程包括在记录介质上写入至少三个轨道。 如果中间轨道的误码率增加，则在记录测试轨迹以确定导致最小误码率的新激光电流时激光电流被扫描。 新的激光电流用于后续写入操作。

公开(公告)号：US09548068B1

公开(公告)日：2017-01-17

申请号：US14854279

申请日：2015-09-15

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Drew Michael Mader ,  Alfredo Sam Chu

IPC: G11B5/00 ,  G11B5/455 ,  G11B5/012 ,  G11B7/1267 ,  G11B5/60 ,  G11B5/31 ,  G11B19/04

CPC classification number: G11B5/012 ,  G11B5/3189 ,  G11B5/455 ,  G11B5/59627 ,  G11B5/6088 ,  G11B19/041 ,  G11B2005/0021

Abstract: A change in an optical energy profile of energy emitted from a read/write head is determined. The read/write head includes an optical transmission path that emits the energy to heat a heat-assisted recording medium during writing. A change in optical efficiency of the read/write head is also determined. Based on the change in the optical energy profile and the change in the optical efficiency, a change in the effectiveness of the read/write head is determined, and in response a mitigation is performed.

Abstract translation: 确定从读/写头发射的能量的光能分布的变化。 读/写头包括在写入期间发射能量以加热热辅助记录介质的光传输路径。 读/写头的光学效率的变化也被确定。 基于光能量分布的变化和光学效率的变化，确定读/写头的有效性的变化，并且作为响应，执行缓解。