公开(公告)号：US10147453B1

公开(公告)日：2018-12-04

申请号：US14882420

申请日：2015-10-13

Applicant: Seagate Technology LLC

Inventor： Alfredo Sam Chu ,  Franklin P Martens ,  Aaron Jacobs

IPC: G11B5/012 ,  G11B7/1267 ,  G11B5/00 ,  G11B5/455

Abstract: This disclosure is related to systems, devices, processes, and methods to optimize a laser power boost amplitude, a laser power boost duration, or both in a heat-assisted data recording device, such as in heat-assisted magnetic recording (HAMR). The amplitude and duration for the laser power boost may be determined for a specific portion of a write operation, such as a first sector of the write operation. During operation of a data storage device, the laser power boost may provide additional power to the laser for the specific portion. Once the laser power boost duration has elapsed, the data storage device may continue providing power to the laser at the normal power input range of the laser. The laser power boost settings may be determined on a per head per zone basis, per track basis, or another configuration.

公开(公告)号：US20160275978A1

公开(公告)日：2016-09-22

申请号：US14661522

申请日：2015-03-18

Applicant: Seagate Technology LLC

Inventor： Qun Zang ,  Meherab Amaria ,  Ying Lin ,  Aaron Jacobs ,  Daniel Brown

IPC: G11B5/60 ,  G11B5/41

CPC classification number: G11B5/41 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/607 ,  G11B5/6076

Abstract: A first adaptive fly height measurement is performed between a read/write head and a recording medium during a stage of qualification testing of a magnetic disk drive. A second adaptive fly height measurement of the read/write head is performed during a subsequent stage of the qualification testing. In response to determining that a fly height decrease between the first and second adaptive fly height measurements is above a threshold value, a mitigation operation is performed to remove a contaminant from a media-facing surface of the read/write head.

Abstract translation: 在磁盘驱动器的认证测试阶段期间，在读/写头和记录介质之间执行第一自适应飞行高度测量。 读/写头的第二自适应飞行高度测量在资格测试的后续阶段执行。 响应于确定第一和第二自适应飞行高度测量之间的飞行高度减小高于阈值，执行缓解操作以从读/写头的面向媒体的表面去除污染物。

公开(公告)号：US09542963B2

公开(公告)日：2017-01-10

申请号：US14661522

申请日：2015-03-18

Applicant: Seagate Technology LLC

Inventor： Qun Zang ,  Meherab Amaria ,  Ying Lin ,  Aaron Jacobs ,  Daniel Brown

IPC: G11B5/41 ,  G11B5/60

CPC classification number: G11B5/41 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/607 ,  G11B5/6076

Abstract: A first adaptive fly height measurement is performed between a read/write head and a recording medium during a stage of qualification testing of a magnetic disk drive. A second adaptive fly height measurement of the read/write head is performed during a subsequent stage of the qualification testing. In response to determining that a fly height decrease between the first and second adaptive fly height measurements is above a threshold value, a mitigation operation is performed to remove a contaminant from a media-facing surface of the read/write head.

Abstract translation: 在磁盘驱动器的认证测试阶段期间，在读/写头和记录介质之间执行第一自适应飞行高度测量。 读/写头的第二自适应飞行高度测量在资格测试的后续阶段执行。 响应于确定第一和第二自适应飞行高度测量之间的飞行高度减小高于阈值，执行缓解操作以从读/写头的面向媒体的表面去除污染物。

公开(公告)号：US10657987B1

公开(公告)日：2020-05-19

申请号：US16207912

申请日：2018-12-03

Applicant: Seagate Technology LLC

Inventor： Alfredo Sam Chu ,  Franklin P. Martens ,  Aaron Jacobs

IPC: G11B5/012 ,  G11B5/455 ,  G11B5/00

Abstract: This disclosure is related to systems, devices, processes, and methods to optimize a laser power boost amplitude, a laser power boost duration, or both in a heat-assisted data recording device, such as in heat-assisted magnetic recording (HAMR). The amplitude and duration for the laser power boost may be determined for a specific portion of a write operation, such as a first sector of the write operation. During operation of a data storage device, the laser power boost may provide additional power to the laser for the specific portion. Once the laser power boost duration has elapsed, the data storage device may continue providing power to the laser at the normal power input range of the laser. The laser power boost settings may be determined on a per head per zone basis, per track basis, or another configuration.