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1. 发明授权

US07894156B2 Determination of wedge offset correction values for a disk drive 有权
标题翻译：确定磁盘驱动器的楔形偏移校正值
公开(公告)号：US07894156B2
公开(公告)日：2011-02-22
申请号：US12414498
申请日：2009-03-30
申请人： Richard M. Ehrlich , Anton L. Gerasimov
发明人： Richard M. Ehrlich , Anton L. Gerasimov
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： In a disk drive, a wedge-based scheme is used to determine wedge offset correction values for a track of the disk drive. Correction values for the offset of each servo wedge are calculated wedge-by-wedge, based on the position error signal (PES) of the most recently measured servo wedge in combination with the measured PES of other servo wedges. To minimize transport delay of the servo, the majority of servo-control calculations may be pre-calculated prior to measuring the PES at the current wedge. Wedge offset correction values for a given servo wedge are corrected iteratively with each revolution of the storage disk.
摘要翻译：在磁盘驱动器中，使用基于楔形的方案来确定磁盘驱动器的轨道的楔形偏移校正值。基于最近测量的伺服楔的位置误差信号（PES）与其他伺服楔的测量的PES结合，逐楔计算每个伺服楔的偏移的校正值。为了最小化伺服的传输延迟，在测量当前楔形件之间的PES之前，可以预先计算大部分伺服控制计算。对于给定的伺服楔的楔形偏移校正值在存储盘的每次旋转时被迭代地校正。

2. 发明授权

US07864476B2 Low track-per-inch (TPI) zone with reduced need for adjacent-track-erasure (ATE) refresh 失效
标题翻译：低轨道每英寸（TPI）区域，减少对相邻轨道擦除（ATE）刷新的需求
公开(公告)号：US07864476B2
公开(公告)日：2011-01-04
申请号：US12052480
申请日：2008-03-20
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B15/04 , G11B19/04 , G11B27/36
CPC分类号： G11B5/596 , G11B5/012 , G11B20/10009 , G11B20/1217 , G11B2020/1298 , G11B2220/2516
摘要： Methods and systems are shown that specify at least one low track-per-inch (TPI) region and at least one normal TPI region on a disk. The low TPI region may be used to store information that may be rewritten frequently. The normal TPI region may be used to store information that may be rewritten less frequently. The low TPI region may reduce the need for adjacent-track-erasure (ATE) refresh.
摘要翻译：示出了方法和系统，其指定至少一个低轨道/英寸（TPI）区域和盘上的至少一个正常TPI区域。低TPI区域可以用于存储可以经常重写的信息。正常的TPI区域可以用于存储可能被重写的频率较低的信息。低TPI区域可能减少对相邻轨道擦除（ATE）刷新的需要。

3. 发明申请

US20100246056A1 DETERMINATION OF WEDGE OFFSET CORRECTION VALUES FOR A DISK DRIVE 有权
标题翻译：确定磁盘驱动器的楔形偏差校正值
公开(公告)号：US20100246056A1
公开(公告)日：2010-09-30
申请号：US12414498
申请日：2009-03-30
申请人： Richard M. EHRLICH , Anton L. GERASIMOV
发明人： Richard M. EHRLICH , Anton L. GERASIMOV
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： In a disk drive, a wedge-based scheme is used to determine wedge offset correction values for a track of the disk drive. Correction values for the offset of each servo wedge are calculated wedge-by-wedge, based on the position error signal (PES) of the most recently measured servo wedge in combination with the measured PES of other servo wedges. To minimize transport delay of the servo, the majority of servo-control calculations may be pre-calculated prior to measuring the PES at the current wedge. Wedge offset correction values for a given servo wedge are corrected iteratively with each revolution of the storage disk.
摘要翻译：在磁盘驱动器中，使用基于楔形的方案来确定磁盘驱动器的轨道的楔形偏移校正值。基于最近测量的伺服楔的位置误差信号（PES）与其他伺服楔的测量的PES结合，逐楔计算每个伺服楔的偏移的校正值。为了最小化伺服的传输延迟，在测量当前楔形件之间的PES之前，可以预先计算大部分伺服控制计算。对于给定的伺服楔的楔形偏移校正值在存储盘的每次旋转时被迭代地校正。

4. 发明授权

US07227714B2 Methods for conditional servowriting 失效
标题翻译：条件伺服算法
公开(公告)号：US07227714B2
公开(公告)日：2007-06-05
申请号：US10819089
申请日：2004-04-06
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B21/02 , G11B15/05
CPC分类号： G11B5/59633 , G11B5/59638
摘要： To account for head misplacement while servowriting, conditional writing and/or trimming of servo information can be used. Conditional servowriting allows servowriting to be disabled when it is determined that servo information will not be written and/or trimmed at a desired location or within a threshold distance of a desired location. For example, if a distance between a write element or a predicted location of servo information and a desired location of the servo information or write element exceeds a threshold, writing and/or trimming can be inhibited. Servowriting can be resumed when it is determined that servo information will be written or trimmed at a desired location or within a threshold distance of a desired location. A servowriting step or pass is not re-started when the threshold is exceeded and those wedges for which servo information was not written and/or trimmed can be attempted during subsequent revolutions of the rotatable storage medium.
摘要翻译：为了在伺服驱动时考虑头部错位，可以使用伺服信息的条件写入和/或修整。当确定伺服信息将不会在期望位置或所需位置的阈值距离内被写入和/或修剪时，条件伺服驱动允许禁用伺服驱动。例如，如果写入元件或伺服信息的预测位置与伺服信息或写入元件的期望位置之间的距离超过阈值，则可以抑制写入和/或修整。当确定伺服信息将在期望位置或期望位置的阈值距离内被写入或修剪时，可以恢复伺服。当超过阈值时，伺服驱动步骤或通过不能重新启动，并且可以在可旋转存储介质的后续转动期间尝试那些没有写入和/或修剪伺服信息的楔形物。

5. 发明授权

US07206148B2 Variable frequency chevron in printed media reference pattern to improve servo demodulation 有权
标题翻译：印刷媒体参考图案中的变频人字形改善了伺服解调
公开(公告)号：US07206148B2
公开(公告)日：2007-04-17
申请号：US11081346
申请日：2005-03-16
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B5/09
CPC分类号： G11B5/59655 , G11B5/5526 , G11B5/59688
摘要： Reference patterns in accordance with the present invention can include variable frequency chevrons incorporated into a reference pattern on a printed media surface to improve servo demodulation. In an embodiment, the reference pattern can include one or more servo wedges having a preamble including digital information at a first frequency relative to the head when the rotatable medium is rotated at a spin speed. The servo wedges further include at least one field having a first set of a plurality of phase-bursts forming a positive chevron angle relative to the preamble and a second set of a plurality of phase-bursts forming a negative chevron angle relative to the preamble, wherein a frequency of the at least one field relative to the head when the rotatable medium is rotated at the spin speed varies between a first end of the media surface and a second end.
摘要翻译：根据本发明的参考图案可以包括结合到印刷介质表面上的参考图案中的可变频斜面，以改善伺服解调。在一个实施例中，参考图案可以包括具有前导码的一个或多个伺服楔形物，当前置旋转介质以旋转速度旋转时，前置码包括相对于头部的第一频率的数字信息。伺服楔块还包括至少一个场，其具有相对于前同步码形成正的人字角的第一组多个相位脉冲，以及相对于前导码形成负的人字角的多个相位脉冲串的第二组，其中当所述可旋转介质以所述旋转速度旋转时，所述至少一个场相对于所述头的频率在所述介质表面的第一端和第二端之间变化。

6. 发明授权

US07167335B1 Systems for variable multi-pass servowriting and self-servowriting 有权
标题翻译：用于可变多路径伺服驱动和自伺服驱动的系统
公开(公告)号：US07167335B1
公开(公告)日：2007-01-23
申请号：US10818446
申请日：2004-04-05
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B21/02 , G11B5/596
CPC分类号： G11B5/59633 , G11B21/106
摘要： The amount of position error written into a servo burst pattern can be reduced by using additional media revolutions to write the pattern. Where the edges of two servo bursts are used to define a position on the media, trimming the first burst and writing the second burst on separate revolutions will result in a different amount of position error being written into each burst. The end result will be a reduction in the overall error in position information. In order to further reduce the position error given by a burst pair, each burst also can be trimmed and/or written in multiple passes. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.
摘要翻译：通过使用额外的介质转数来写入图案，可以减少写入伺服突发图案的位置误差量。在两个伺服脉冲串的边缘用于限定介质上的位置的情况下，修整第一个脉冲串并以不同的转数写入第二个脉冲串将导致不同量的位置误差被写入每个脉冲串。最终结果将是减少位置信息的总体错误。为了进一步减少由突发对给出的位置误差，每个突发也可以被多次修剪和/或写入。本说明书不是对本发明的完整描述或限制本发明的范围。本发明的其它特征，方面和目的可以通过对说明书，附图和权利要求的评述来获得。

7. 发明授权

US07130146B2 Two-pass-per-track servo burst patterns 有权
标题翻译：双通道磁道伺服突发模式
公开(公告)号：US07130146B2
公开(公告)日：2006-10-31
申请号：US11081445
申请日：2005-03-16
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B5/596
CPC分类号： G11B5/59655
摘要： A rotatable storage media includes multiple concentric data tracks and servo sectors embedded within the tracks. In some embodiments, the servo sectors have servo burst patterns including a plurality of burst groups, with each of the burst groups including a trimmed burst that is stitched and trimmed such that is has a first width, and an untrimmed burst that has a second width that is less than the first width. In other embodiments, each of the burst groups include a pair of untrimmed bursts, with one of the untrimmed bursts being wider than the other. In still another embodiment, all bursts are trimmed, but some are wider than others. Preferably, such burst patterns are written using a two-pass-per-track servowriting scheme. This description is not intended to be a complete description of, or limit the scope of, the invention.
摘要翻译：可旋转存储介质包括嵌入轨道内的多个同心数据轨道和伺服扇区。在一些实施例中，伺服扇区具有包括多个突发群组的伺服突发模式，其中每个突发群组包括经缝合和修剪以使其具有第一宽度的修整突发，以及具有第二宽度的未修整突发即小于第一宽度。在其他实施例中，每个突发组包括一对未修剪的脉冲串，其中一个未修整脉冲串比另一个更宽。在另一个实施例中，所有突发都被修剪，但是一些比其他突发更宽。优选地，这种脉冲串模式是使用每通道双通道伺服驱动方案来写的。本说明书不是对本发明的完整描述或限制本发明的范围。

8. 发明授权

US07095580B2 Methods to determine gross and fine positioning on a reference surface of a media 有权
标题翻译：确定介质参考表面上的粗略和精确定位的方法
公开(公告)号：US07095580B2
公开(公告)日：2006-08-22
申请号：US10733131
申请日：2003-12-10
申请人： Richard M. Ehrlich , Gary W. Calfee , Anton Gerasimov , James V. Wiseman
发明人： Richard M. Ehrlich , Gary W. Calfee , Anton Gerasimov , James V. Wiseman
IPC分类号： G11B5/596
CPC分类号： G11B5/5552 , G11B5/012 , G11B5/865 , G11B2005/001 , G11B2005/0021
摘要： Methods in accordance with the present invention can include determining a position of a head along a stroke by locating one or more marker-zones printed to a reference surface of a disk. The one or more marker-zones can be printed to a portion of the reference surface as one or more pulses from a template pattern that can further comprise a plurality of chevrons. In one embodiment, each pulse can trace the motion of the stroke along at least a portion of the radius of the reference surface. A pulse can identify a marker-zone edge when the pulse disappears at some radius from the center of the disk. By moving the head along the stroke, the marker-zone edge can be detected and a gross position determined. A fractional position can be determined by measuring a phase of a chevron located at substantially the same radial location as the edge.
摘要翻译：根据本发明的方法可以包括通过定位打印到盘的参考表面的一个或多个标记区来确定头沿着笔划的位置。可以将一个或多个标记区域打印到参考表面的一部分，作为可以进一步包括多个人字纹的模板图案的一个或多个脉冲。在一个实施例中，每个脉冲可以沿着参考表面的半径的至少一部分跟踪行程的运动。当脉冲从磁盘中心的某个半径消失时，脉冲可以识别标记区域边缘。通过沿着行程移动头部，可以检测到标记区域边缘并确定总位置。可以通过测量位于与边缘基本相同的径向位置处的人字形的相位来确定小数位置。

9. 发明授权

US07027244B2 Systems for self-servowriting using write-current variation 失效
标题翻译：使用写入电流变化的自伺服系统
公开(公告)号：US07027244B2
公开(公告)日：2006-04-11
申请号：US10818473
申请日：2004-04-05
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B5/09
CPC分类号： G11B5/02 , G11B5/59633 , G11B5/59666 , G11B20/10481
摘要： In order to account for the misplacement of a write element during a servowriting process, the width of the information being written can be varied. In a self-servowriting disk drive, for example, the write current supplied to a read/write head can be adjusted to vary the width of information, such as servo bursts, written by the head. By calibrating the head and determining the misplacement of the head while writing, an edge of a servo burst can be placed in the desired position regardless of the misplacement of the head simply by adjusting the width of the written burst. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.
摘要翻译：为了解决在伺服写入过程中写入元件的错位，可以改变被写入的信息的宽度。例如，在自伺服磁盘驱动器中，可以调整提供给读/写头的写入电流，以改变由磁头写入的诸如伺服脉冲串的信息的宽度。通过校准头部并且在写入时确定头部的错位，伺服脉冲串的边缘可以简单地通过调整写入脉冲串的宽度而被放置在期望的位置，而不管头部的错位。本说明书不是对本发明的完整描述或限制本发明的范围。本发明的其它特征，方面和目的可以通过对说明书，附图和权利要求的评述来获得。

10. 发明授权

US07016133B2 Systems for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness 失效
标题翻译：用于检测SAM模式的多次发生的系统，从而提高伺服解调的鲁棒性
公开(公告)号：US07016133B2
公开(公告)日：2006-03-21
申请号：US10412853
申请日：2003-04-14
申请人： Richard M. Ehrlich
发明人： Richard M. Ehrlich
IPC分类号： G11B5/09
CPC分类号： G11B5/59688
摘要： Systems are provided for improving servo-demodulation robustness. Multiple occurrences of a SAM pattern are searched for in a single servo wedge. Each detection of the SAM pattern in the servo wedge is charactered as a good SAM detection or a bad SAM detection. If more than one detection of the SAM pattern in the servo wedge are characterized as good SAM detections, one of the detections is selected as the best good SAM detection. Further servo functions can then be performed based on the best good SAM detection.
摘要翻译：提供系统以提高伺服解调的鲁棒性。在单个伺服楔中搜索多次出现的SAM模式。伺服楔中的SAM图案的每次检测都被称为良好的SAM检测或不良SAM检测。如果伺服楔中SAM模式的多次检测被表征为良好的SAM检测，则其中一个检测被选为最佳的良好SAM检测。然后可以基于最佳的良好SAM检测执行其他伺服功能。

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