公开(公告)号：US07471481B2

公开(公告)日：2008-12-30

申请号：US11405871

申请日：2006-04-18

申请人： King Wai Thomas Lau ,  Richard Koonwai Wong ,  Fatih Sarigoz ,  Ara W. Nazarian

发明人： King Wai Thomas Lau ,  Richard Koonwai Wong ,  Fatih Sarigoz ,  Ara W. Nazarian

IPC分类号： G11B21/02 ,  G11B5/09

CPC分类号： G11B5/59688 ,  G11B5/59638 ,  G11B5/59666

摘要： Magnetic reference patterns may be generated on a disk or other magnetic media without the need for seed wedges. This involves writing a first magnetic reference pattern to the disk with a servo writer. The disk may then be transferred to a hard disk drive. Control circuitry within the hard disk drive may recognize the first magnetic reference pattern and then position a RW head within the hard disk drive based on the first magnetic reference pattern. As the RW drive is accurately positioned based on the first magnetic reference pattern a second magnetic reference pattern may be written to the disk using the RW head. The RW head location is determined based on the velocity and phase between the read-write head and spiral sync marks contained within the first magnetic reference pattern.

摘要翻译： 可以在盘或其他磁性介质上产生磁参考图案，而不需要种子楔。 这涉及用伺服写入器将第一磁参考图形写入盘。 然后可以将磁盘传输到硬盘驱动器。 硬盘驱动器内的控制电路可以识别第一磁性参考图案，然后基于第一磁性参考图案将RW磁头定位在硬盘驱动器内。 由于RW驱动器基于第一磁性参考图案精确地定位，所以可以使用RW磁头将第二磁性参考图案写入磁盘。 基于包含在第一磁参考图案内的读写头和螺旋同步标记之间的速度和相位来确定RW磁头位置。

公开(公告)号：US20080253018A1

公开(公告)日：2008-10-16

申请号：US12146133

申请日：2008-06-25

申请人： Benjamin Geunbae Ryu ,  Ara W. Nazarian

发明人： Benjamin Geunbae Ryu ,  Ara W. Nazarian

IPC分类号： G11B5/596

CPC分类号： G11B5/59688

摘要： A method determines RW head radial position relative to tracks within a magnetic data disc. This involves sensing both a S-burst signal and a P-burst signal with the RW head. The S-burst signal and P-burst signal are associated with a two-burst servo pattern on the magnetic disc. The S-burst pattern has a phase that remains constant radially across tracks within the magnetic disc. The P-burst has a second phase that rotates radially across tracks within the magnetic disc. By determining a phase difference between a sensed S-burst signal and P-burst signal, it is possible to determine the RW head radial position relative to the tracks on the magnetic disc.

摘要翻译： 一种方法确定相对于磁数据盘内的轨道的RW头径向位置。 这涉及用RW头来检测S脉冲串信号和P脉冲串信号。 S脉冲信号和P脉冲串信号与磁盘上的双脉冲串伺服模式相关联。 S脉冲串图案具有在磁盘内的轨迹上径向保持恒定的相位。 P脉冲串具有第二相，其在磁盘内的轨迹上径向旋转。 通过确定感测的S脉冲串信号和P脉冲串信号之间的相位差，可以确定相对于磁盘上的磁道的RW磁头的径向位置。

公开(公告)号：US07312943B2

公开(公告)日：2007-12-25

申请号：US11269068

申请日：2005-11-08

申请人： King Wai Thomas Lau ,  Ara W. Nazarian ,  Benjamin Geunbae Ryu ,  Richard Koonwai Wong

发明人： King Wai Thomas Lau ,  Ara W. Nazarian ,  Benjamin Geunbae Ryu ,  Richard Koonwai Wong

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666

摘要： The present invention provides a method of generating magnetic reference patterns on a disk or other magnetic media. This involves writing a first magnetic reference pattern to the disk with a servo writer. The disk may then be transferred to a hard disk drive. Control circuitry within the hard disk drive may recognize the first magnetic reference pattern and then position a RW head within the hard disk drive based on the first magnetic reference pattern. As the RW drive is accurately positioned based on the first magnetic reference pattern a second magnetic reference pattern may be written to the disk using the RW head. The RW head location is determined based on the velocity and phase between the read-write head and servo setter marks contained within the first magnetic reference pattern.

摘要翻译： 本发明提供了一种在盘或其他磁性介质上产生磁性参考图案的方法。 这涉及用伺服写入器将第一磁参考图形写入盘。 然后可以将磁盘传输到硬盘驱动器。 硬盘驱动器内的控制电路可以识别第一磁性参考图案，然后基于第一磁性参考图案将RW磁头定位在硬盘驱动器内。 由于RW驱动器基于第一磁性参考图案精确地定位，所以可以使用RW磁头将第二磁性参考图案写入磁盘。 基于包含在第一磁性参考图案中的读写头和伺服设定器标记之间的速度和相位来确定RW磁头位置。

公开(公告)号：US07529059B2

公开(公告)日：2009-05-05

申请号：US12146133

申请日：2008-06-25

申请人： Benjamin Geunbae Ryu ,  Ara W. Nazarian

发明人： Benjamin Geunbae Ryu ,  Ara W. Nazarian

IPC分类号： G11B5/596

CPC分类号： G11B5/59688

摘要： A method determines RW head radial position relative to tracks within a magnetic data disc. This involves sensing both a S-burst signal and a P-burst signal with the RW head. The S-burst signal and P-burst signal are associated with a two-burst servo pattern on the magnetic disc. The S-burst pattern has a phase that remains constant radially across tracks within the magnetic disc. The P-burst has a second phase that rotates radially across tracks within the magnetic disc. By determining a phase difference between a sensed S-burst signal and P-burst signal, it is possible to determine the RW head radial position relative to the tracks on the magnetic disc.

摘要翻译： 一种方法确定相对于磁数据盘内的轨道的RW头径向位置。 这涉及用RW头来检测S脉冲串信号和P脉冲串信号。 S脉冲信号和P脉冲串信号与磁盘上的双脉冲串伺服模式相关联。 S脉冲串图案具有在磁盘内的轨迹上径向保持恒定的相位。 P脉冲串具有第二相，其在磁盘内的轨迹上径向旋转。 通过确定感测的S脉冲串信号和P脉冲串信号之间的相位差，可以确定相对于磁盘上的磁道的RW磁头的径向位置。

公开(公告)号：US06310742B1

公开(公告)日：2001-10-30

申请号：US09603809

申请日：2000-06-26

申请人： Ara W. Nazarian ,  Charles W. Simmons ,  Thao P. Trieu ,  Richard K. Wong

发明人： Ara W. Nazarian ,  Charles W. Simmons ,  Thao P. Trieu ,  Richard K. Wong

IPC分类号： G11B5596

CPC分类号： G11B5/59688 ,  G11B5/59627

摘要： A method in a magnetic storage disk drive for independently learning and thereafter canceling repeatable runout that is written to the servo fields of each servo track during the servo writing process. The method does not require a servo writer because the disk drive may independently detect the runout without spinning out of control in response to such runout by operating its servo control loop in a low bandwidth mode so that it is less responsive to the higher frequency components of the runout, and by removing the effect of the DC component of the runout or selected harmonics on each revolution. The method takes several revolutions to “learn” the servo wedges of a current track by initializing a wedge runout value for each servo wedge and an average uncorrected runout value and then successively developing an interim wedge runout estimate for each servo wedge by adding a fractional portion &lgr; of a raw position error signal to a fractional portion (1−&lgr;) of the wedge runout value, computing a corrected position error signal by subtracting the interim wedge runout estimate from the raw position error signal, and computing a new wedge runout value by subtracting the average uncorrected runout value from the interim wedge runout estimate and, subsequent to each revolution, updating the average uncorrected runout value.

摘要翻译： 一种磁存储盘驱动器中的方法，用于在伺服写入过程期间独立学习并随后取消写入每个伺服磁道的伺服磁场的可重复跳动。 该方法不需要伺服写入器，因为磁盘驱动器可以通过在低带宽模式下操作其伺服控制环路来响应于这种跳动独立地检测跳动而不脱离控制，使得其对较高频率分量的响应较小 跳动，并且通过消除每次旋转的跳动或选定谐波的直流分量的影响。该方法需要几圈以通过初始化每个伺服楔的楔形跳动值来“学习”当前轨道的伺服楔，并且 平均未校正的跳动值，然后通过将原始位置误差信号的小数部分羔羊添加到楔形跳动值的小数部分（1-lambd）来连续地开发每个伺服楔的临时楔形跳动估计，计算校正的位置误差信号 通过从原始位置误差信号中减去临时楔形跳动估计，并通过减去平均值来计算新的楔形跳动值 从临时楔形跳动估计中摆出的跳动值，并且在每次旋转之后，更新平均未校正的跳动值。

公开(公告)号：US6141175A

公开(公告)日：2000-10-31

申请号：US946805

申请日：1997-10-08

申请人： Ara W. Nazarian ,  Charles W. Simmons ,  Thao P. Trieu ,  Richard K. Wong

发明人： Ara W. Nazarian ,  Charles W. Simmons ,  Thao P. Trieu ,  Richard K. Wong

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59627

摘要： A method in a magnetic storage disk drive for independently learning and thereafter canceling repeatable runout that is written to the servo fields of each servo track during the servo writing process. The method does not require a servo writer because the disk drive may independently detect the runout without spinning out of control in response to such runout by operating its servo control loop in a low bandwidth mode so that it is less responsive to the higher frequency components of the runout, and by removing the effect of the DC component of the runout or selected harmonics on each revolution.The method takes several revolutions to "learn" the servo wedges of a current track by initializing a wedge runout value for each servo wedge and an average uncorrected runout value and then successively developing an interim wedge runout estimate for each servo wedge by adding a fractional portion .lambda. of a raw position error signal to a fractional portion (1-.lambda.) of the wedge runout value, computing a corrected position error signal by subtracting the interim wedge runout estimate from the raw position error signal, and computing a new wedge runout value by subtracting the average uncorrected runout value from the interim wedge runout estimate and, subsequent to each revolution, updating the average uncorrected runout value.

摘要翻译： 一种磁存储盘驱动器中的方法，用于在伺服写入过程期间独立学习并且随后取消写入每个伺服磁道的伺服磁场的可重复跳动。 该方法不需要伺服写入器，因为磁盘驱动器可以通过在低带宽模式下操作其伺服控制环路来响应于这种跳动独立地检测跳动而不脱离控制，使得其对较高频率分量的响应较小 跳动，并通过消除每次旋转的跳动或选定谐波的直流分量的影响。 该方法通过初始化每个伺服楔的楔形跳动值和平均未校正的跳动值来“学习”当前轨道的伺服楔，然后通过添加小数部分来连续地显示每个伺服楔的临时楔形跳动估计 原始位置误差信号的λ到楔形跳动值的小数部分（1-lambda），通过从原始位置误差信号中减去临时楔形跳动估计值来计算校正的位置误差信号，并且通过 从临时楔形跳动估计中减去平均未校正的跳动值，并且在每次旋转之后，更新平均未校正的跳动值。

公开(公告)号：US4578625A

公开(公告)日：1986-03-25

申请号：US563958

申请日：1983-12-21

申请人： Ara W. Nazarian ,  Donald G. Stupeck

发明人： Ara W. Nazarian ,  Donald G. Stupeck

IPC分类号： H02P23/00 ,  H02P5/00

CPC分类号： H02P23/16 ,  Y10S388/912

摘要： Disclosed is a rotational speed control system for comparing the rotational speed of a rotating disk as indicated by index pulses occurring one or more times per revolution of the disk, with a reference time representing the desired time between successive index pulses. The system employs logic circuitry external to any microprocessor control system employed by the rotating disk system. The reference time may be supplied by counters counting externally supplied clock pulses to a fixed value. The speed control system provides a speed up command or slow down command in a manner proportional to the speed error to the disk drive motor where the time between successive index pulses is greater or less, respectively, than the reference time.

摘要翻译： 公开了一种转速控制系统，用于比较旋转盘的旋转速度，如旋转盘旋转一次或多次的指标脉冲所示，参考时间表示连续的指标脉冲之间的期望时间。 该系统采用由旋转盘系统采用的任何微处理器控制系统外部的逻辑电路。 参考时间可以由计数外部提供的时钟脉冲的计数器提供给固定值。 速度控制系统以与参考时间分别大于或等于连续的索引脉冲之间的时间的速度误差与盘驱动马达成比例的方式提供加速命令或减速命令。

公开(公告)号：US06757481B1

公开(公告)日：2004-06-29

申请号：US09401069

申请日：1999-09-22

申请人： Ara W. Nazarian ,  Russell R. Stern

发明人： Ara W. Nazarian ,  Russell R. Stern

IPC分类号： H04N591

CPC分类号： G11B19/02 ,  G11B5/012 ,  G11B5/5547 ,  H04N5/775 ,  H04N5/781 ,  H04N5/9261

摘要： A disk drive selectively provides either higher-performance seek operations or reduced-audible noise while effecting seek operations. A higher performance seek operating mode and a quiet seek operating mode are defined. The servo controller controls seek operations and may store and/or access a number of seek profiles including a first seek profile defined to provide relatively short average seek times and a second seek profile defined to provide quieter operation on average in comparison with the first seek profile. The servo controller and associated circuitry causes the drive to effect a seek operation subject to the first seek profile in response to the higher performance seek operating mode and effect a seek subject to the second seek profile in response to the quiet seek operating mode. The differing modes of operation may be invoked automatically, manually and/or adaptively, based upon a command from a host, input from a user, or some signal generated from within or without the drive or device incorporating the drive.

摘要翻译： 磁盘驱动器在进行搜索操作时选择性地提供更高性能的寻道操作或降低的可听噪声。 定义了更高性能的寻道操作模式和安静的寻道操作模式。 伺服控制器控制搜索操作，并且可以存储和/或访问多个寻道简档，其包括被定义为提供相对较短的平均寻道时间的第一寻找轮廓，以及定义为与第一寻找轮廓相比平均提供更安静的操作的第二寻找轮廓 。 伺服控制器和相关联的电路使得驱动器响应于较高性能寻找操作模式而进行受第一寻找配置文件的搜索操作，并响应于安静搜索操作模式来影响寻求第二寻找配置文件的寻道。 可以基于来自主机的命令，来自用户的输入，或者内部驱动器或装置内部产生的某些信号，自动，手动和/或自适应地调用不同的操作模式。

公开(公告)号：US06710953B1

公开(公告)日：2004-03-23

申请号：US09823738

申请日：2001-03-30

申请人： Mark F. Vallis ,  Ara W. Nazarian

发明人： Mark F. Vallis ,  Ara W. Nazarian

IPC分类号： G11B2736

CPC分类号： G11B27/36

摘要： A disk drive implements a technique for improving data storage capacity of data tracks having a servo wedge defect. A servo-fault position threshold is established for aborting a write operation if a transducer head position error from a circular track centerline exceeds the servo-fault position threshold. Servo wedges having operation, the servo-fault position threshold is ignored at a tagged servo wedge thereby preventing the tagged servo wedge from aborting a write operation. The data write operation is prevented for a predetermined number of servo wedges immediately following the tagged servo wedge by skipping data wedges between the tagged servo wedge and a last servo wedge of the predetermined number of servo wedges. Data may be written to a data wedge immediately following the last servo wedge.

摘要翻译： 磁盘驱动器实现用于改善具有伺服楔形缺陷的数据轨道的数据存储容量的技术。 如果来自圆形轨道中心线的传感器头位置误差超过伺服故障位置阈值，则建立伺服故障位置阈值以中止写入操作。 具有操作的伺服楔形件，在标记的伺服楔形件处忽略伺服故障位置阈值，从而防止标记的伺服楔块中止写入操作。 通过跳过标记的伺服楔和预定数量的伺服楔的最后一个伺服楔之间的数据楔，防止在标记的伺服楔之后的预定数量的伺服楔的数据写入操作。 数据可能会在最后一个伺服楔之后立即写入数据楔。

公开(公告)号：US06388829B1

公开(公告)日：2002-05-14

申请号：US09364744

申请日：1999-07-30

申请人： Ara W. Nazarian

发明人： Ara W. Nazarian

IPC分类号： G11B509

CPC分类号： G11B5/59655

摘要： A disk drive having multi-burst servo wedges and single-burst servo wedges for improving shock performance with less impact on data space than otherwise possible and a method of increasing the servo sampling rate for effecting reasonable shock detection in such a disk drive using such multi-burst and single-burst servo wedges. The additional single-burst servo wedges may contain certain desired servo wedge fields, or may consist of just the servo burst itself. In operation, the multi-burst and single servo wedges are processed in series. The multi-burst servo wedge is read to develop a position error signal and control the head, and the single-burst servo wedge is read, the single burst amplitude is compared to one of the plurality of burst amplitudes and, if the single burst amplitude differs by more than a predetermined threshold amount from the one previous burst amplitudes, the system aborts a data write operation.

摘要翻译： 具有多突发伺服楔形和单突发伺服楔形的磁盘驱动器，用于改善冲击性能，同时对数据空间的影响小于否则可能;以及一种增加伺服采样速率以便在这种磁盘驱动器中进行合理的冲击检测的方法， - 爆裂和单脉冲伺服楔。 附加的单脉冲串伺服楔可以包含某些所需的伺服楔场，或者可以仅由伺服脉冲本身构成。 在操作中，多脉冲串和单伺服楔形串联处理。 读取多脉冲串伺服楔以形成位置误差信号并控制磁头，读出单脉冲串伺服楔形，将单脉冲串幅度与多个脉冲串幅度中的一个进行比较，如果单脉冲串幅度 与前一个突发脉冲幅度相差大于预定阈值，系统中止数据写入操作。