公开(公告)号：US08817410B1

公开(公告)日：2014-08-26

申请号：US14040569

申请日：2013-09-27

申请人： WD Media, LLC

发明人： Andreas Moser ,  Harold H. Gee ,  Steven E. Lambert ,  Dragos I. Mircea

IPC分类号： G11B5/02

CPC分类号： G11B5/59672

摘要： Systems and methods for improving accuracy of head positioning using existing servo patterns are provided. In one embodiment, a method for improving read head positioning is provided that comprises: writing a series of tracks over a range of read offsets to be calibrated; measuring a set of raw track profiles from the series of tracks; sampling the set of raw track profiles at a series of signal amplitude levels; constructing a reference track profile from the set of sampled track profiles; calculating a set of read offset deltas from each sampled track profile; merging the sets of read offset deltas into a set of average read offset deltas; and converting the set of average read offset deltas into a read offset correction table. A similar method for improving disk write head positioning is also provided which utilizes such a read offset correction table to eventually create write offset correction table.

摘要翻译： 提供了使用现有伺服模式提高磁头定位精度的系统和方法。 在一个实施例中，提供了一种用于改善读取头定位的方法，其包括：在待校准的读取偏移范围上写入一系列轨道; 从一系列轨道测量一组原始轨道轮廓; 在一系列信号幅度水平上对原始轨迹轮廓进行采样; 从所述采样的轨道轮廓集合中构造参考轨道轮廓; 从每个采样的轨道轮廓计算一组读取偏移量增量; 将读取偏移量三角形组合成一组平均读取偏移量三角形; 并将平均读取偏移量三角形的集合转换为读取偏移校正表。 还提供了一种用于改善磁盘写入头定位的类似方法，其利用这种读取偏移校正表来最终创建写偏移校正表。

公开(公告)号：US09093122B1

公开(公告)日：2015-07-28

申请号：US13925734

申请日：2013-06-24

申请人： WD Media, LLC.

发明人： Dragos I. Mircea ,  Steven E. Lambert ,  Andreas Moser ,  Harold H. Gee ,  Douglas N. Bartholomew

IPC分类号： G11B27/36 ,  G11B5/012 ,  G11B20/10

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B5/455 ,  G11B20/10305 ,  G11B20/10314 ,  G11B2220/2516

摘要： Systems and methods for improving the accuracy of test measurements involving aggressor tracks written to the disks are provided. One such method involves erasing a circumferential band of a disk, writing a central track on the circumferential band, measuring and storing a first track profile of the central track, writing an aggressor track on each side of the central track at a preselected aggressor track offset from the central track, measuring and storing a track profile of the aggressor tracks at the preselected aggressor track offset, measuring and storing a second track profile of the central track, performing the prior actions exactly n times where n is greater than or equal to 1, determining an estimated distance between the aggressor tracks based on the respective track profiles, determining a selected measurement using the estimated distance between the aggressor tracks, and the first and second track profiles of the central track.

摘要翻译： 提供了用于提高涉及写入磁盘的侵入轨迹的测试测量精度的系统和方法。 一种这样的方法包括擦除盘的周向带，在圆周带上写入中心轨道，测量和存储中心轨道的第一轨道轮廓，在预选的侵略者轨道偏移处写入中心轨道的每一侧上的侵略轨道 测量和存储在预选的侵略者轨道偏移处的侵略者轨道的轨道轮廓，测量和存储中心轨迹的第二轨道轮廓，执行n次大于或等于1的n次的先前动作 基于相应的轨道轮廓来确定攻击者轨道之间的估计距离，使用侵略者轨道之间的估计距离以及中心轨道的第一和第二轨道轮廓确定所选择的测量。