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1. 发明申请

US20120300327A1 SYSTEM AND METHOD FOR IMPROVING HEAD POSITIONING 失效
标题翻译：改善头部位置的系统和方法
公开(公告)号：US20120300327A1
公开(公告)日：2012-11-29
申请号：US13115307
申请日：2011-05-25
申请人： Andreas Moser , Harold H. Gee , Steven E. Lambert , Dragos I. Mircea
发明人： Andreas Moser , Harold H. Gee , Steven E. Lambert , Dragos I. Mircea
IPC分类号： G11B27/36
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。

2. 发明授权

US08619381B2 System and method for improving head positioning 失效
标题翻译：改善头部定位的系统和方法
公开(公告)号：US08619381B2
公开(公告)日：2013-12-31
申请号：US13115307
申请日：2011-05-25
申请人： Andreas Moser , Harold H. Gee , Steven E. Lambert , Dragos I. Mircea
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。

3. 发明授权

US08711499B1 Methods for measuring media performance associated with adjacent track interference 有权
标题翻译：用于测量与相邻轨道干扰相关的介质性能的方法
公开(公告)号：US08711499B1
公开(公告)日：2014-04-29
申请号：US13045416
申请日：2011-03-10
申请人： Mrugesh Desai , Harold H. Gee , Mark A. Nichols
发明人： Mrugesh Desai , Harold H. Gee , Mark A. Nichols
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B20/10453 , G11B2220/2516
摘要： Methods for measuring media performance associated with adjacent track interference are provided. One such method includes iteratively writing data to a target track for each of a plurality of n frequencies, measuring a first signal amplitude and a first noise for each of the n sectors on the target track, writing an aggressor track pattern proximate the target track, measuring a second signal amplitude and a second noise for each of the n sectors on the target track, calculating a weighted sum for each of the signal amplitude measurements for each of the plurality of n frequencies, and calculating a weighted sum for each of the noise measurements for each of the plurality of n frequencies, and repeating the writing the aggressor track pattern, the measuring the second signal amplitude and the second noise, and calculating the weighted sums for preselected numbers of times.
摘要翻译：提供了测量与相邻轨道干扰相关的介质性能的方法。一种这样的方法包括向多个n个频率中的每一个迭代地向目标轨道写入数据，测量目标轨道上的n个扇区中的每一个的第一信号幅度和第一噪声，在目标轨道附近写入攻击者轨迹，测量所述目标轨道上的所述n个扇区中的每一个的第二信号幅度和第二噪声，针对所述多个n个频率中的每一个为每个所述信号幅度测量计算加权和，并且计算每个所述噪声的加权和测量多个n个频率中的每一个，并重复写入侵略者轨迹图案，测量第二信号幅度和第二噪声，以及计算预选次数的加权和。

4. 发明授权

US08125724B1 Predictive characterization of adjacent track erasure in recording media 有权
标题翻译：记录介质中相邻轨道擦除的预测表征
公开(公告)号：US08125724B1
公开(公告)日：2012-02-28
申请号：US12722489
申请日：2010-03-11
申请人： Mark A. Nichols , Harold H. Gee
发明人： Mark A. Nichols , Harold H. Gee
IPC分类号： G11B27/36
CPC分类号： G11B20/24 , G11B5/012 , G11B5/09 , G11B20/1816 , G11B27/36 , G11B2020/10851 , G11B2220/2516
摘要： A wide area track erasure (WATER) rate of change is determined from a model generated from a plurality of track erasure measurements performed on a magnetic recording media. A model of the change in noise amplitude for an off-track position as a function of the number of aggressor track writes employed in the track erasure measurements is generated. In a log-linear space a linear fit of the change in noise amplitude with respect to the number of aggressor track writes yields a rate of noise amplitude change (dB/decade) which may be utilized to rank magnetic recording media.
摘要翻译：从对磁记录介质执行的多个轨道擦除测量产生的模型确定广域轨迹擦除（WATER）变化率。产生作为轨道擦除测量中采用的侵略轨迹写入次数的离线位置的噪声幅度变化的模型。在对数线性空间中，噪声幅度变化相对于侵略轨道写入数的线性拟合产生可用于对磁记录介质进行排序的噪声幅度变化率（dB / decade）。

5. 发明授权

US08125723B1 Predictive characterization of adjacent track erasure in recording media 有权
标题翻译：记录介质中相邻轨道擦除的预测表征
公开(公告)号：US08125723B1
公开(公告)日：2012-02-28
申请号：US12718927
申请日：2010-03-05
申请人： Mark A. Nichols , Harold H. Gee , Eric Roddick , Mrugesh Desai
发明人： Mark A. Nichols , Harold H. Gee , Eric Roddick , Mrugesh Desai
IPC分类号： G11B27/36 , G11B5/03
CPC分类号： G11B5/09 , G11B5/012 , G11B5/024 , G11B20/1816 , G11B20/22 , G11B2020/10851 , G11B2020/1869 , G11B2220/2516
摘要： Cross-track density capability is predicted for a large number of writes based on a plurality of erase band width measurements. Over the plurality of erase band width measurements, a number of writes in a series of writes performed as part of an aggressing track sequence is varied. A model of the magnetic track width (MTW) as function of the number of writes employed in the MTW measurements may be generated and an estimate of the erase band width for a large number of writes derived from the model as a prediction of cross-track density capability.
摘要翻译：基于多个擦除带宽测量，对于大量写入来预测跨轨道密度能力。在多个擦除带宽测量中，作为侵略轨迹序列的一部分执行的一系列写入中的多个写入被改变。可以产生作为在MTW测量中使用的写入数目的函数的磁道宽度（MTW）的模型，并且从模型导出的大量写入的擦除带宽的估计作为交叉轨道的预测密度能力。

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