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    Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer
    91.
    发明授权
    Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer 失效
    通过测量读写宽度并改变伺服写入器中的磁道间距而制造和制造磁盘驱动器的方法

    公开(公告)号：US07035026B2

    公开(公告)日：2006-04-25

    申请号：US10978644

    申请日：2004-11-01

    Applicant: Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M. Chue

    Inventor： Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M. Chue

    IPC: G11B27/36 ,  G11B21/02

    CPC classification number: G11B5/59633 ,  G11B5/59638 ,  Y10T29/49036

    Abstract: A method of manufacturing a disk drive and a disk drive where the width of the read element and the width of the write element are both measured at servo-writing time and the track pitch of the disk drive is set on the basis of those measurements. Disk drives with superior head width combinations are servo-written with a narrower track pitch in order to have a higher storage capacity. Disk drives with inferior head width combinations are detected before servo-writing so that the disk drive may be servo-written with wider track pitch rather than with a nominal track pitch that results in a subsequent drive failure during initial burn-in (IBI). The heads are used more efficiently in that heads that are more capable are used to their ability and less capable heads that would otherwise be disposed of are used at all.

    Abstract translation: 基于这些测量，设置在伺服写入时刻测量读取元件的宽度和写入元件的宽度的盘驱动器和盘驱动器的方法，并且基于这些测量来设置磁盘驱动器的磁道间距。 具有优异头宽度组合的磁盘驱动器以较窄的磁道间距进行伺服写入，以具有更高的存储容量。 在伺服写入之前检测到具有较差头部宽度组合的磁盘驱动器，以便磁盘驱动器可以以更宽的磁道间距进行伺服写入，而不是在初始老化（IBI）期间导致后续驱动器故障的标称磁道间距。 头部被更有效地使用在那些使用能力更强的头部，否则将被处理的头部不太可用。

    Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer
    92.
    发明申请
    Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writer 失效
    通过测量读写宽度并改变伺服写入器中的磁道间距而制造和制造磁盘驱动器的方法

    公开(公告)号：US20050117240A1

    公开(公告)日：2005-06-02

    申请号：US10978644

    申请日：2004-11-01

    Applicant: Raffi Codilian ,  William Johns ,  Charles Park ,  David Nguyen ,  Jack Chue

    Inventor： Raffi Codilian ,  William Johns ,  Charles Park ,  David Nguyen ,  Jack Chue

    IPC: G11B5/596 ,  G11B21/02 ,  G11B27/36 ,  H04R31/00

    CPC classification number: G11B5/59633 ,  G11B5/59638 ,  Y10T29/49036

    Abstract: A method of manufacturing a disk drive and a disk drive where the width of the read element and the width of the write element are both measured at servo-writing time and the track pitch of the disk drive is set on the basis of those measurements. Disk drives with superior head width combinations are servo-written with a narrower track pitch in order to have a higher storage capacity. Disk drives with inferior head width combinations are detected before servo-writing so that the disk drive may be servo-written with wider track pitch rather than with a nominal track pitch that results in a subsequent drive failure during initial burn-in (IBI). The heads are used more efficiently in that heads that are more capable are used to their ability and less capable heads that would otherwise be disposed of are used at all.

    Abstract translation: 基于这些测量，设置在伺服写入时刻测量读取元件的宽度和写入元件的宽度的盘驱动器和盘驱动器的方法，并且基于这些测量来设置磁盘驱动器的磁道间距。 具有优异头宽度组合的磁盘驱动器以较窄的磁道间距进行伺服写入，以具有更高的存储容量。 在伺服写入之前检测到具有较差头部宽度组合的磁盘驱动器，以便磁盘驱动器可以以更宽的磁道间距进行伺服写入，而不是在初始老化（IBI）期间导致后续驱动器故障的标称磁道间距。 头部被更有效地使用在那些使用能力更强的头部，否则将被处理的头部不太可用。

    Method of manufacturing a disk drive by measuring the read width in the servo-writer to set the write unsafe limit
    93.
    发明授权
    Method of manufacturing a disk drive by measuring the read width in the servo-writer to set the write unsafe limit 失效
    通过测量伺服写入器中的读取宽度来设置写入不安全限制来制造磁盘驱动器的方法

    公开(公告)号：US06714372B1

    公开(公告)日：2004-03-30

    申请号：US09967838

    申请日：2001-09-28

    Applicant: Raffi Codilian ,  William D. Johns

    Inventor： Raffi Codilian ,  William D. Johns

    IPC: G11B1504

    CPC classification number: G11B5/59633 ,  G11B5/59638

    Abstract: A method of manufacturing a disk drive where the width of the read element is measured at servo-writing time in order to establish a write unsafe (WUS) limit corresponding to a maximum distance during writing that the write element is permitted to move radially offtrack from the centerline of a data track before writing is disabled. The method includes the steps of measuring a width of the read element with a servo track writer and determining a write unsafe (WUS) limit based on the data track pitch and the measured width of the read element. Varying the WUS limit on a drive-by-drive basis enhances the performance of some drives that would otherwise have capability that goes unused.

    Abstract translation: 一种制造磁盘驱动器的方法，其中在伺服写入时间测量读取元件的宽度，以便建立与写入期间的最大距离相对应的写入不安全（WUS）极限，使得允许写入元件径向地从 写入之前的数据轨道的中心线被禁用。 该方法包括以下步骤：使用伺服轨迹写入器测量读取元件的宽度，并且基于数据轨道间距和读取元件的测量宽度确定写入不安全（WUS）极限。 逐个驱动的基础上改变WUS限制会增强某些驱动器的性能，否则这些驱动器将具有未使用的功能。

    In drive correction of servo pattern errors
    95.
    发明授权
    In drive correction of servo pattern errors 失效
    驱动器校正伺服模式错误

    公开(公告)号：US5793559A

    公开(公告)日：1998-08-11

    申请号：US607507

    申请日：1996-02-27

    Applicant: Stanley H. Shepherd ,  Richard M. Ehrlich ,  James V. Wiseman ,  Richard T. Curran ,  William R. Akin, Jr.

    Inventor： Stanley H. Shepherd ,  Richard M. Ehrlich ,  James V. Wiseman ,  Richard T. Curran ,  William R. Akin, Jr.

    IPC: G11B5/596 ,  G11B21/10

    CPC classification number: G11B5/59627 ,  G11B5/59638 ,  G11B5/59655

    Abstract: Embedded servo sectors within a data track of a hard disk drive including a rotating data storage disk and a closed loop rotary actuator structure for positioning a data transducer head relative to the data track are written by a method including the steps of positioning the rotary actuator structure relative to the data track with a laser-interferometer-based servo writer and writing a pattern of circumferentially sequential, radially offset fine position bursts within each servo sector with the data transducer head, this step including writing-in undetermined position errors within each pattern being written, moving the disk drive to a self scan environment away from the servo writer, operating the rotary actuator structure in closed loop for following the data track by reference to the servo burst pattern, extracting the undetermined position error from each pattern thereby to iteratively determine written-in position errors, generating burst correction values from the determined written-in position errors, and writing the burst correction values to the data track for later use by the closed loop rotary actuator structure during following of the data track to remove the written-in position errors.

    Abstract translation: 包括旋转数据存储盘的硬盘驱动器的数据轨道内的嵌入式伺服扇区和用于相对于数据轨道定位数据变换器头的闭环旋转致动器结构通过包括以下步骤的方法来写入：​​将旋转致动器结构 相对于具有基于激光干涉仪的伺服写入器的数据轨迹，并且使用数据换能器头在每个伺服扇区内写入周向顺序的径向偏移的精细位置脉冲串的模式，该步骤包括在每个模式内写入未定位置误差 写入，将磁盘驱动器移动到远离伺服写入器的自扫描环境，通过参考伺服脉冲串模式在闭环中操作旋转致动器结构以跟随数据轨迹，从每个图案提取未定位置误差，从而迭代地确定 写入位置误差，从确定的wr产生突发校正值 输入位置误差，以及将脉冲串校正值写入数据轨道，以便在跟踪数据轨道期间由闭环旋转致动器结构稍后使用以消除写入位置误差。

    Tri-phase servo pattern for providing information for positioning the transducers of a magnetic disk storage drive
    96.
    发明授权
    Tri-phase servo pattern for providing information for positioning the transducers of a magnetic disk storage drive 失效
    用于提供用于定位磁盘存储驱动器的换能器的信息的三相伺服模式

    公开(公告)号：US4811135A

    公开(公告)日：1989-03-07

    申请号：US932814

    申请日：1986-11-19

    Applicant: Donald W. Janz

    Inventor： Donald W. Janz

    IPC: G11B5/596 ,  G11B21/10

    CPC classification number: G11B5/59688 ,  G11B5/59638 ,  G11B5/59655

    Abstract: Servo data, including three types of servo patterns distinguishable by phase, are stored in concentric servo tracks on a magnetic information storage disk. Each servo track includes a plurality of only one type of pattern, with consecutive tracks arranged in a repeating sequence of the three servo pattern types. For phase recognition, the pattern types further are arranged in a repeating sequence of angular sectors, each sector having a plurality of but one type of pattern. The servo patterns in a given storage track thus are always angularly offset from the servo patterns in the next adjacent tracks. This permits the use of servo patterns having a radial dimension greater than the separation between adjacent tracks, increasing servo signal reliability and transducer dynamic range.

    Abstract translation: 伺服数据，包括可通过相位区分的三种类型的伺服模式，存储在磁信息存储盘上的同心伺服磁道中。 每个伺服轨道包括多个仅一种类型的模式，其中连续轨道以三个伺服模式类型的重复序列排列。 对于相位识别，图案类型进一步被布置成角度扇区的重复序列，每个扇区具有多个但是一种类型的图案。 因此，给定存储轨道中的伺服模式总是与下一个相邻轨道中的伺服模式成角度地偏移。 这允许使用具有大于相邻轨道之间的间隔的径向尺寸的伺服图案，增加伺服信号可靠性和换能器动态范围。

    Magnetic disk having data area and index servo area and servo system for positioning read/write head on magnetic disk
    97.
    发明授权
    Magnetic disk having data area and index servo area and servo system for positioning read/write head on magnetic disk 失效
    具有数据区和索引伺服区的磁盘和用于在磁盘上定位读/写磁头的伺服系统

    公开(公告)号：US4737869A

    公开(公告)日：1988-04-12

    申请号：US841820

    申请日：1986-03-20

    Applicant: Toshihiro Sugaya ,  Nobuyuki Takagi ,  Norio Nakamura ,  Kazunori Moriya

    Inventor： Toshihiro Sugaya ,  Nobuyuki Takagi ,  Norio Nakamura ,  Kazunori Moriya

    IPC: G11B5/596 ,  G11B21/10 ,  G11B5/82

    CPC classification number: G11B5/59638 ,  G11B5/59688

    Abstract: A magnetic disk comprises a data area and a single index servo sector area embedded in the data area. The servo sector has three or more servo information pattern sections formed side by side in the direction of data tracks in the data area. The servo information pattern sections each have a plurality of servo information bit cells formed in a predetermined pattern in a direction perpendicular to the direction of data tracks. The servo information bit cells are used to produce a position signal for positioning a read/write head. A servo system for positioning the read/write head averages a plurality of position signals obtained from the servo information pattern sections and uses the averaged position signal for positioning the read/write head.

    Abstract translation: 磁盘包括嵌入在数据区中的数据区和单索引伺服扇区。 伺服扇区具有在数据区域中的数据轨道的方向上并排形成的三个或更多个伺服信息模式部分。 伺服信息模式部分各自具有在垂直于数据磁道方向的方向上以预定模式形成的多个伺服信息位单元。 伺服信息位单元用于产生用于定位读/写头的位置信号。 用于定位读/写头的伺服系统平均从伺服信息模式部分获得的多个位置信号，并使用平均位置信号来定位读/写头。

    Magnetic disk device and method
    98.
    发明授权
    Magnetic disk device and method 有权

    公开(公告)号：US11955146B2

    公开(公告)日：2024-04-09

    申请号：US18179824

    申请日：2023-03-07

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

    Inventor： Naoki Tagami

    IPC: G11B5/012 ,  G11B5/02 ,  G11B5/187 ,  G11B5/55 ,  G11B5/596

    CPC classification number: G11B5/012 ,  G11B5/02 ,  G11B5/1878 ,  G11B5/5526 ,  G11B5/59638 ,  G11B5/59655

    Abstract: According to one embodiment, in a magnetic disk, a plurality of first servo sectors is arranged at intervals in the circumferential direction. Each of the plurality of first servo sectors includes a first area and a second area. First information including a preamble, a servo mark, and a Gray code is written in the first area. The second area is disposed after the first area in a write and read direction along the circumferential direction, and second information including a burst pattern is written in the second area. The plurality of first servo sectors includes a plurality of second servo sectors and a plurality of third servo sectors. The circumferential length of a first area included in each of the plurality of third servo sectors is longer than the circumferential length of a first area included in each of the plurality of second servo sectors.

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