公开(公告)号：US06798606B2

公开(公告)日：2004-09-28

申请号：US10054587

申请日：2002-01-22

申请人： Yifan Tang ,  Craig N. Fukushima ,  Isao Yoneda ,  Hiroshi Uchida

发明人： Yifan Tang ,  Craig N. Fukushima ,  Isao Yoneda ,  Hiroshi Uchida

IPC分类号： G11B5596

CPC分类号： G11B7/0945 ,  G11B5/59627

摘要： Non-linearity in a position error signal (PES) for a data storage device is precisely characterized during a calibration phase in the manufacturing process. From this characterization of the PES non-linearity, the data storage device can be programmed with the necessary data to perform accurate, real-time linearization calculations of the PES in order to compensate for non-linearity in the PES during operation. The sequence of calibration steps includes a PES gain calibration, a first servo loop gain calibration, a PES linearization calibration, and an optional second servo loop gain calibration.

摘要翻译： 数据存储装置的位置误差信号（PES）的非线性在制造过程的校准阶段被精确地表征。 从PES非线性的这种表征可以将数据存储装置编程为必要的数据，以执行PES的精确的实时线性化计算，以便在运行期间补偿PES中的非线性。 校准步骤的顺序包括PES增益校准，第一伺服环路增益校准，PES线性化校准和可选的第二伺服环路增益校准。

公开(公告)号：US06917487B2

公开(公告)日：2005-07-12

申请号：US10104649

申请日：2002-03-21

申请人： Craig N. Fukushima

发明人： Craig N. Fukushima

IPC分类号： G11B5/596

CPC分类号： G11B5/59633

摘要： A disk storage system having servo data stored thereon for accurate head position control over a magnetic or other storage medium. The servo data is seamless and untrimmed and consists of a primary servo burst set (AB burst) that defines the desired tract pitch for the surface. Multiple secondary servo burst sets (e.g., CD burst and EF burst) are written at the desired track pitch but radially offset from the primary burst set. The servo data is written in multiple servo sectors around the surface of the medium. From the servo data, PES (position error signals) are generated for providing linear position sensitivity information to the head position control logic. The resulting PES is more linear for smaller head sizes.

摘要翻译： 一种具有存储在其上的伺服数据的磁盘存储系统，用于通过磁性或其它存储介质进行精确的磁头位置控制。 伺服数据是无缝的和未修整的，并且由一个主伺服突发组（AB burst）组成，其定义了表面的所需管道间距。 多个次伺服突发组（例如，CD脉冲串和EF脉冲串）以所需的磁道间距被写入，但是与主脉冲串组成径向偏移。 伺服数据被写入介质表面周围的多个伺服扇区。 从伺服数据生成PES（位置误差信号），用于向头部位置控制逻辑提供线性位置灵敏度信息。 对于较小的头部尺寸，所得的PES更线性。

公开(公告)号：US08559125B2

公开(公告)日：2013-10-15

申请号：US11125597

申请日：2005-05-09

申请人： Craig N. Fukushima

发明人： Craig N. Fukushima

IPC分类号： G11B5/596

CPC分类号： G11B5/59633

摘要： A disk storage system having servo data stored thereon for accurate head position control over a magnetic or other storage medium. The servo data is seamless and untrimmed and consists of a primary servo burst set (AB burst) in which the difference defines the desired tract pitch for the surface. Multiple secondary servo burst sets (e.g., CD burst and EF burst) are written at the desired track pitch but radially offset from the primary burst set. In one embodiment, two secondary servo burst sets are used, but alternatively, any number of secondary servo burst sets could be used. In this exemplary embodiment having two secondary servo burst sets, the CD servo burst set is offset by ⅓ of the track pitch from the primary servo burst set. Also in this embodiment, the EF servo burst set is offset by ⅔ of the track pitch from the primary servo burst set. There are six bursts per set. The servo data is written in multiple servo sectors around the surface of the medium. From the servo data, three PES (position error signals) are generated, A−B, C−D and E−F, for providing linear position sensitivity information to the head position control logic. The resulting PES is more linear for smaller head sizes.

公开(公告)号：US06359749B1

公开(公告)日：2002-03-19

申请号：US09419479

申请日：1999-10-15

申请人： Craig N. Fukushima

发明人： Craig N. Fukushima

IPC分类号： G11B5265

CPC分类号： G11B5/4886 ,  G11B5/5526 ,  G11B5/5534 ,  G11B5/59683

摘要： A dual element read/write head for a direct access storage device (DASD) positions the read and write elements relative to each other such that the same servo track can be used for read and write operations at the disk outside diameter (OD). As the head is moved across the disk from the OD toward the ID, different servo tracks are used for positioning the read and write elements in the same track as the head moves toward the disk ID. The STW TMR portion of the total TMR at the OD is thereby minimized to zero, so that the total TMR at the OD is primarily a function of only the conventional WW TMR and WR TMR components. The STW TMR gets larger as the head assembly moves toward the ID, so that the total TMR at the ID becomes a function of both the STW TMR and the remaining TMR components. At the ID, however, the read-write element compensation error component of total TMR is smaller than it is at the OD, and can be more easily dealt with, using known servo readback signal processing methods, and making it easier to carry out the typical signal processing employed by servo controllers.

摘要翻译： 用于直接访问存储设备（DASD）的双元件读/写头将读取和写入元件相对于彼此定位，使得相同的伺服轨迹可用于在盘外径（OD）处的读和写操作。 当磁头从OD向ID移动到磁盘上时，不同的伺服磁道用于将读取和写入元件定位在与磁头ID朝向磁盘ID移动的同一轨道中。 OD的总TMR的STW TMR部分由此最小化为零，使得OD处的总TMR主要仅是传统的WW TMR和WR TMR分量的函数。 当头组件向ID移动时，STW TMR变大，使得ID处的总TMR成为STW TMR和剩余TMR分量的函数。 然而，在ID处，总TMR的读写元件补偿误差分量小于OD，并且可以使用已知的伺服回读信号处理方法更容易地处理，并且使得更容易执行 伺服控制器采用的典型信号处理。

公开(公告)号：US06429995B1

公开(公告)日：2002-08-06

申请号：US09299893

申请日：1999-04-27

申请人： Jeff J. Dobbek ,  Gregory Michael Frees ,  Craig N. Fukushima ,  Louis Joseph Serrano ,  Blake Finstad

发明人： Jeff J. Dobbek ,  Gregory Michael Frees ,  Craig N. Fukushima ,  Louis Joseph Serrano ,  Blake Finstad

IPC分类号： G11B5596

CPC分类号： G11B5/59655

摘要： A method, apparatus, and an article of manufacture for calibrating a position error signal for controlling the position of a read transducer with respect to a storage media having positioning information written at a location thereon. In one embodiment, the invention is embodied in a method comprising determining a relationship between a read transducer position and the positioning information by measuring the positioning information while passing the read transducer across the location, determining a measured position error signal from the measured positioning information, and computing a relationship between the measured position error signal and the read transducer position.

摘要翻译： 一种用于校准位置误差信号的方法，装置和制品，用于控制读取换能器相对于具有写入其上的位置的定位信息的存储介质的位置。 在一个实施例中，本发明体现在一种方法中，包括通过在将读取的换能器穿过位置通过测量定位信息来确定读取换能器位置与定位信息之间的关系，从测量的定位信息确定测量的位置误差信号， 并计算所测量的位置误差信号和读取换能器位置之间的关系。

公开(公告)号：US6049442A

公开(公告)日：2000-04-11

申请号：US800901

申请日：1997-02-12

申请人： Craig N. Fukushima ,  Karl Arnold Belser

发明人： Craig N. Fukushima ,  Karl Arnold Belser

IPC分类号： G11B5/596 ,  G11B21/10

CPC分类号： G11B21/106 ,  G11B5/59655 ,  G11B5/59688

摘要： A servo pattern for use on a data storage surface that includes at least one track to minimize position error during positioning of a transducer over the data storage surface. The servo pattern includes a plurality of servo burst fields of constant amplitude for defining a centerline of the track and for determining the position of the transducer. According to the present invention, at least one servo burst field comprises N segments, where N.gtoreq.2, and each of the N segments is written with constant amplitude. The amplitude of the at least one servo burst field is then determined as a function of the amplitudes of the N segments.

摘要翻译： 一种在数据存储表面上使用的伺服图案，其包括至少一个轨道，以在传感器定位在数据存储表面上时最小化位置误差。 伺服模式包括多个恒定幅度的伺服脉冲串场，用于定义轨道的中心线并确定换能器的位置。 根据本发明，至少一个伺服脉冲串场包括N个段，其中N≥2，并且N个段中的每一个被以恒定的幅度写入。 然后确定至少一个伺服脉冲串场的幅度作为N个段的振幅的函数。

公开(公告)号：US06975478B2

公开(公告)日：2005-12-13

申请号：US10815314

申请日：2004-04-01

申请人： Craig N. Fukushima ,  Kevin I. Tzou ,  Mantle Man-Hon Yu

发明人： Craig N. Fukushima ,  Kevin I. Tzou ,  Mantle Man-Hon Yu

IPC分类号： G11B5/58 ,  G11B5/596

CPC分类号： G11B5/59627

摘要： A disk drive manufacturing method calibrates the stitching gain of a position error signal (PES) by sampling servo information from a quadrature servo pattern while the head is maintained at the quarter-track positions and then calculating the kurtosis of the distribution of the PES values calculated from the samples. Because the kurtosis is a measure of the deviation from a normal or Gaussian distribution, the kurtosis of a PES distribution is used to optimize the stitching gain value through iteration until the kurtosis is close to zero, indicating that the PES with the optimal stitching gain values has a near-Gaussian distribution. The stitching gain calibration is performed for all heads and for multiple tracks across the surface of the disk for each head. The resulting values of stitching gain, each associated with a head and track, are stored in the disk drive memory and recalled during operation of the disk drive.

摘要翻译： 磁盘驱动器制造方法通过在将头保持在四分之一轨道位置的同时从正交伺服模式采样伺服信息来校准位置误差信号（PES）的缝合增益，然后计算所计算的PES值的分布的峰度 从样品。 由于峰度是与正态分布或高斯分布的偏差的度量，所以通过迭代使用PES分布的峰度来优化缝合增益值，直到峰度接近于零，表明具有最佳缝合增益值的PES 具有近似高斯分布。 对于所有磁头执行缝合增益校准，并针对每个磁头执行跨磁盘表面的多个磁道。 每个与头部和轨道相关联的所得到的缝合增益值存储在磁盘驱动器存储器中，并且在磁盘驱动器的操作期间被调用。

公开(公告)号：US06940677B2

公开(公告)日：2005-09-06

申请号：US10261873

申请日：2002-10-01

申请人： Craig N. Fukushima ,  Scott A. Thomas

发明人： Craig N. Fukushima ,  Scott A. Thomas

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B21/02 ,  G11B5/59633

摘要： Distinct servo patterns are written on data storage media of a data storage device. Servo patterns of a first type are written for transducers of the data storage device having a first transducer characteristic. Servo patterns of a second type are written for transducers that do not have the transducer characteristic. The transducer characteristic can be a geometric criterion such as read head and write head track width, an operating characteristic such as frequency response, or otherwise. The first servo pattern may be a seamless untrimmed PES burst and the second servo pattern may be a seamed trimmed PES burst.

摘要翻译： 不同的伺服模式写在数据存储设备的数据存储介质上。 为具有第一传感器特性的数据存储装置的换能器写入第一类型的伺服模式。 第二种类型的伺服模式用于不具有换能器特性的换能器。 换能器特性可以是几何标准，例如读头和写头轨道宽度，诸如频率响应的操作特性，或其他。 第一伺服模式可以是无缝未修整的PES突发，并且第二伺服模式可以是接缝的修整的PES突发。

公开(公告)号：US06836453B2

公开(公告)日：2004-12-28

申请号：US10050318

申请日：2002-01-16

申请人： Craig N. Fukushima

发明人： Craig N. Fukushima

IPC分类号： G11B700

CPC分类号： G11B5/5521 ,  G11B19/04

摘要： A data storage device performs a re-read of data prior to a read inhibit for data recovery and validation. When misregistration of read/write heads occurs, as indicated by a sampled servo position, data read from a track of the data storage device is withheld from a host until a subsequent sampled servo position is verified to be within a read limit width of the track. Data blocks preceding the servo position that caused the posting of the read inhibit are re-read, once the read inhibit is cleared. If the read inhibit is not present following the re-read of the data, this re-read data can be released to the host.

摘要翻译： 数据存储设备在数据恢复和验证的禁止读取之前执行数据的重新读取。 当读取/写入头发生重合时，如采样伺服位置所示，从数据存储设备的轨道读取的数据从主机停止，直到后续采样的伺服位置被验证为在磁道的读取限制宽度内 。 一旦读取禁止被清除，重新读取导致读取禁止发生的伺服位置之前的数据块。 如果在重新读取数据之后读取禁止不存在，则可以将该重新读取的数据释放到主机。

公开(公告)号：US06522493B1

公开(公告)日：2003-02-18

申请号：US09300071

申请日：1999-04-27

申请人： Jeff J. Dobbek ,  Gregory Michael Frees ,  Craig N. Fukushima ,  Louis Joseph Serrano ,  Markus Staudenmann

发明人： Jeff J. Dobbek ,  Gregory Michael Frees ,  Craig N. Fukushima ,  Louis Joseph Serrano ,  Markus Staudenmann

IPC分类号： G11B2102

CPC分类号： G11B5/59627

摘要： A method, apparatus, and article of manufacture for determining a transducer position in relation to a media surface is described. The method comprises sensing positioning information on the media, measuring a position error signal from the sensed positioning information wherein the position error signal includes first and second position signal components, accessing stored information describing a non-linear relationship between the measured position error signal and the transducer position, and applying the stored relationship to the measured position error signal to produce a corrected position error signal, and determining the transducer position from the corrected position error signal.

摘要翻译： 描述了一种用于确定相对于介质表面的换能器位置的方法，装置和制品。 该方法包括：感测媒体上的定位信息，根据感测到的定位信息测量位置误差信号，其中位置误差信号包括第一和第二位置信号分量，访问存储的信息，描述所测量的位置误差信号与 换能器位置，并且将所存储的关系应用于所测量的位置误差信号以产生校正的位置误差信号，以及根据校正的位置误差信号确定换能器位置。