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31. 发明申请

US20040212914A1 Magnetic disk unit 失效
标题翻译：磁盘单元
公开(公告)号：US20040212914A1
公开(公告)日：2004-10-28
申请号：US10846587
申请日：2004-05-17
发明人： Masaki Yamamoto
IPC分类号： G11B005/596
CPC分类号： G11B5/59605 , G11B5/5526 , G11B5/5543 , G11B5/59677 , G11B21/106
摘要： A disk-shaped magnetic recording medium having a reference track and a plurality of data tracks is rotated by a motor which generates an index signal at a predetermined position. A magnetic head is slightly moved in the radial direction of the medium for each predetermined unit distance smaller than the data track width, and a reproduction output amplitude measuring circuit measures the reproduction output amplitude of a signal read from the data track for each index signal. A CPU obtains a position where the amplitude has the maximum value based on the number of head movements and the amplitude at that time so as to control data track positioning. Further, the CPU calculates a relative position between the data track position and the reference track position to perform reference track positioning. The data or reference track positioning of the magnetic head can be performed accurately in a short time.
摘要翻译：具有参考轨道和多个数据轨道的盘形磁记录介质由在预定位置产生索引信号的电动机旋转。磁头在距数据磁道宽度小的每个预定单位距离上在介质的径向方向稍微移动，并且再现输出幅度测量电路测量对于每个索引信号从数据磁道读取的信号的再现输出幅度。 CPU基于头部移动的数量和那时的振幅来获得振幅具有最大值的位置，以便控制数据轨道定位。此外，CPU计算数据轨道位置和参考轨迹位置之间的相对位置，以执行参考轨道定位。可以在短时间内精确地执行磁头的数据或参考轨道定位。

32. 发明授权

US06795268B1 Disk drive employing seek time vcm ir voltage calibration for velocity control of an actuator arm 有权
标题翻译：磁盘驱动器采用寻道时间vcm ir电压校准用于执行器臂的速度控制
公开(公告)号：US06795268B1
公开(公告)日：2004-09-21
申请号：US09704195
申请日：2000-10-31
申请人： Robert P. Ryan
发明人： Robert P. Ryan
IPC分类号： G11B5596
CPC分类号： G11B5/5547 , G11B5/59605
摘要： A disk drive is disclosed comprising a disk, a head, an actuator arm for actuating the head radially over the disk during a seek operation, and a voice coil motor (VCM) for rotating the actuator arm about a pivot, the VCM comprising a coil comprising a VCM resistance R. A back EMF voltage detector measures a back EMF voltage across the coil, and a current detector detects a current I flowing through the coil. An IR voltage detector, responsive to the current I detected by the current detector, detects an IR voltage proportional to the current I times the VCM resistance R. A voltage compensator substantially cancels the IR voltage from the measured back EMF voltage to generate a compensated back EMF voltage. A control voltage generator, responsive the compensated back EMF voltage, generates a control voltage applied to the coil to generate the current I flowing through the coil. A memory stores a first compensated back EMF voltage generated at a first time period of the seek operation. A comparator compares the first compensated back EMF voltage stored in the memory to a second compensated back EMF voltage generated at a second time period of the seek operation. A calibrator, responsive to the comparator, calibrates the IR voltage detector.
摘要翻译：公开了一种磁盘驱动器，其包括盘，头，用于在寻道操作期间在盘上径向驱动头的致动器臂，以及用于使致动器臂围绕枢轴旋转的音圈电机（VCM），VCM包括线圈包括VCM电阻R.反电动势电压检测器测量线圈两端的反电动势电压，电流检测器检测流过线圈的电流I。 IR电压检测器响应于电流检测器检测到的电流I，检测与电流I成比例的IR电压。电压补偿器基本上从测量的反电动势电压中消除IR电压，以产生补偿后的 EMF电压。响应补偿的反电动势电压的控制电压发生器产生施加到线圈的控制电压以产生流过线圈的电流I。存储器存储在寻道操作的第一时间周期产生的第一补偿反向EMF电压。比较器将存储在存储器中的第一补偿反向EMF电压与在寻道操作的第二时间周期产生的第二补偿反向EMF电压进行比较。校准器响应比较器，校准IR电压检测器。

33. 发明授权

US06765749B2 Frequency attenuating filter apparatus and method for a data storage device 失效
标题翻译：用于数据存储装置的频率衰减滤波装置和方法
公开(公告)号：US06765749B2
公开(公告)日：2004-07-20
申请号：US10056337
申请日：2002-01-24
申请人： Paul A. Galloway , Mohammad A. Miah
发明人： Paul A. Galloway , Mohammad A. Miah
IPC分类号： G11B5596
CPC分类号： G11B5/59605
摘要： An attenuating filter for the servo control processor of a disc drive data storage device. The filter is constructed by determining the peak resonance in the structure frequency response above a preselected magnitude and computing a digital notch filter to attenuate that peak resonance. The notch filter domain is then summed with the structure frequency response to derive a modified structure frequency response. The modified structure frequency response is substituted for the unfiltered structure frequency response and again the peak resonance in the modified structure frequency response above a preselected magnitude is determined and a notch filter is computed as necessary. This process of summing the structure frequency response with the latest computed notch filter domain to derive a modified structure frequency response continues until the peak resonance of the latest modified structure frequency response is less than the preselected magnitude.
摘要翻译：一种用于盘驱动器数据存储装置的伺服控制处理器的衰减滤波器。通过确定结构频率响应中的峰值谐振高于预选量值，并计算数字陷波滤波器来衰减峰值共振，来构建滤波器。然后将陷波滤波器域与结构频率响应相加以导出经修改的结构频率响应。修改的结构频率响应代替未滤波的结构频率响应，并且再次确定高于预选幅度的修改结构频率响应中的峰值谐振，并根据需要计算陷波滤波器。将结构频率响应与最新计算的陷波滤波器域相加以导出经修改的结构频率响应的该过程继续进行，直到最新修改的结构频率响应的峰值共振小于预选的幅度。

34. 发明申请

US20040125485A1 Methods for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness 失效
标题翻译：防止信道控制值被破坏的方法，从而提高伺服解调的鲁棒性
公开(公告)号：US20040125485A1
公开(公告)日：2004-07-01
申请号：US10413339
申请日：2003-04-14
发明人： Richard M. Ehrlich
IPC分类号： G11B005/09 , G11B005/596
CPC分类号： G11B27/3027 , G11B5/012 , G11B5/59605 , G11B5/59611 , G11B2220/20
摘要： Methods are provided for improving servo-demodulation robustness. A SAM pattern is searched for in a servo wedge. If the SAM pattern is detected in the first servo wedge, a determination is made whether to characterize the detection of the SAM pattern as either a good SAM detection or a bad SAM detection. If the detection of the SAM pattern is characterized as a good SAM detection, at least one channel control value (e.g., servo AGC and/or PLL values) associated with the first servo wedge is used as a starting channel control value (or to predict a starting channel control value) when beginning to read a next servo wedge. However, if the SAM pattern is not detected, or a SAM detection is characterized as bad, at least one previously stored channel control value is used as a starting channel control value (or to predict a starting channel control value) when beginning to read the next servo wedge.
摘要翻译：提供了提高伺服解调鲁棒性的方法。在伺服楔中搜索SAM模式。如果在第一伺服楔中检测到SAM模式，则确定是否将SAM模式的检测表征为是良好的SAM检测还是SAM检测不良。如果SAM模式的检测被表征为良好的SAM检测，则将与第一伺服楔相关联的至少一个通道控制值（例如，伺服AGC和/或PLL值）用作起始通道控制值（或用于预测起始通道控制值）当开始读取下一个伺服楔形时。然而，如果没有检测到SAM模式，或者SAM检测被表征为差，则在开始读取时，使用至少一个先前存储的信道控制值作为起始信道控制值（或预测起始信道控制值）下一个伺服楔。

35. 发明授权

US06757126B1 Magnetic recording medium having tracking control area formed adjacent data tracks 失效
标题翻译：磁记录媒体具有与数据轨道相邻的跟踪控制区域
公开(公告)号：US06757126B1
公开(公告)日：2004-06-29
申请号：US09293552
申请日：1999-04-16
申请人： Sumio Kuroda , Koichi Iida
发明人： Sumio Kuroda , Koichi Iida
IPC分类号： G11B5596
CPC分类号： G11B5/59605 , G11B5/5526
摘要： A magnetic recording medium having a magnetic layer includes a plurality of tracks formed on the magnetic layer. The tracks have information magnetically recorded thereon. A magnetization change area for tracking control is formed on the magnetic layer adjacent to and along a length of each of the tracks. The magnetization change area has magnetic flux which changes along the length of the tracks.
摘要翻译：具有磁性层的磁记录介质包括形成在磁性层上的多个轨迹。轨道具有磁记录在其上的信息。用于跟踪控制的磁化变化区域形成在与每个轨道相邻并且沿着每个轨道的长度的磁性层上。磁化变化区域具有沿轨道长度变化的磁通量。

36. 发明申请

US20040049605A1 Selecting a target destination using seek cost indicators based on longitudinal position 有权
标题翻译：基于纵向位置，使用搜索成本指标选择目标目的地
公开(公告)号：US20040049605A1
公开(公告)日：2004-03-11
申请号：US10606597
申请日：2003-06-26
申请人： Seagate Technology LLC
发明人： Brian R. Pollock , Reed David Hanson , Nathaniel Boyd Wilson , Jason Dale Gregg , Mark Larry Birtzer
IPC分类号： G06F003/00 , G06F012/00
CPC分类号： G11B5/5526 , G11B5/5547 , G11B5/59605
摘要： A processor is configured to perform a method (110) including a step of deriving lateral offset indicators (1062) from a longitudinal position measurement (130). Improved seek cost indicators (1063) are generated, some or all based on a respective lateral offset indicator (140). Then a target destination is selected using at least one of the improved seek cost indicators (150,160).
摘要翻译：处理器被配置为执行包括从纵向位置测量（130）导出横向偏移指示器（1062）的步骤的方法（110）。基于相应的横向偏移指示符（140）生成改进的搜索成本指标（1063），一些或全部。然后使用改进的搜索成本指示符（150,160）中的至少一个来选择目标目的地。

37. 发明申请

US20040036997A1 Method for writing streaming audiovisual data to a disk drive 有权
标题翻译：将视听数据写入磁盘驱动器的方法
公开(公告)号：US20040036997A1
公开(公告)日：2004-02-26
申请号：US10227494
申请日：2002-08-23
发明人： Steven R. Hetzler , Daniel F. Smith
IPC分类号： G11B005/596 , G11B005/09
CPC分类号： G11B5/59605 , G11B5/02 , G11B20/1217 , G11B27/034 , G11B27/3027 , G11B2020/10537 , G11B2220/20 , H04N5/781
摘要： A method for writing streaming audiovisual data to a disk drive is performed by organizing the data into clusters and commencing writing the clusters to the first physical sector encountered after the read/write head has settled to the desired track on the rotating disk. A cluster contains a number of data blocks corresponding to the number of physical sectors in an integer number of tracks on the disk, so that the writing of a single cluster is the writing to an integer number of full tracks on the disk. Even though the disk drive may have a physical index to identify the first physical sector in all the tracks, the writing of cluster data takes place-without regard to index position. During interleaving of audiovisual data, when multiple recording tasks are cycled until all the tasks are completed, the clusters in the first portion of the first task are written during the first interleave period, the head is then positioned to another track where the clusters in the first portion of the second task are written during the next interleave period, beginning with the first physical sector encountered by the head, again without waiting for index. The location where the first block of cluster data has been written is identified by writing a block number into the physical sector or by writing a start of cluster indicator on the track where the cluster is written.
摘要翻译：通过将数据组织成簇并开始将集群写入在读/写头已经安置到旋转盘上的所需轨道之后遇到的第一物理扇区，从而执行将流视频数据写入磁盘驱动器的方法。集群包含与磁盘上的整数轨道中的物理扇区数相对应的多个数据块，使得单个集群的写入是写入磁盘上整数个完整磁道。即使磁盘驱动器可能具有物理索引来识别所有磁道中的第一个物理扇区，而是在不考虑索引位置的情况下进行集群数据的写入。在视听数据的交织期间，当多个记录任务循环直到所有任务完成时，第一任务的第一部分中的簇在第一交错周期期间被写入，然后头部被定位到另一个轨道，第二任务的第一部分在下一个交错周期期间写入，从头部遇到的第一个物理扇区开始，再次等待索引。已经写入了簇数据的第一块的位置通过将块号写入物理扇区或通过在簇写入的轨道上写入簇指示符的开始来识别。

38. 发明申请

US20040017631A1 Method and apparatus providing spiral servo control for skewless read/writes in a hard disk drive 失效
标题翻译：为硬盘驱动器中的无偏差读/写提供螺旋伺服控制的方法和装置
公开(公告)号：US20040017631A1
公开(公告)日：2004-01-29
申请号：US10202780
申请日：2002-07-24
发明人： Gyu Taek Kim , YoungDug Jung , Yeong Kyun (John) Lee , Sang Hoon Chu
IPC分类号： G11B005/596 , G11B021/02
CPC分类号： G11B5/59605 , G11B5/59633
摘要： The invention provides magnetic disks with the ability for consecutive tracks to be read or written continuously, removing the traversal of the gap between tracks which degrades bandwidth delivery performance. The invention includes a disk surface formatted with tracks, and sectors within these tracks, which vary in radius. The ending radius of a sector differs significantly from its starting radius. The ending radius of the last sector of one track is very close to the starting radius of its successor track, providing a spiral arrangement of tracks, each possessing a fixed number of sectors, and supporting continuous accessing of successive tracks.
摘要翻译：本发明提供具有能够连续读取或写入连续轨道的能力的磁盘，从而消除磁道之间的间隙的遍历，这降低了带宽传送性能。本发明包括用轨道格式化的盘表面，以及这些轨道内的扇区，半径不同。扇区的结束半径与起始半径有显着差异。一个轨道的最后一个扇区的结束半径非常接近其后续轨道的起始半径，提供一个螺旋排列的轨道，每个轨道具有固定数量的扇区，并支持连续轨道的连续访问。

39. 发明授权

US06680812B1 Head positioning control system using sampled data control system for disk drive 失效
标题翻译：磁头定位控制系统采用磁盘驱动采样数据控制系统
公开(公告)号：US06680812B1
公开(公告)日：2004-01-20
申请号：US09661467
申请日：2000-09-13
申请人： Masafumi Iwashiro
发明人： Masafumi Iwashiro
IPC分类号： G11B5596
CPC分类号： G11B5/59605 , G11B5/5521
摘要： A high-performance head positioning control system composed of a suitable combination of a multi-rate control system and a single-rate control system has been disclosed. An SM judging unit selects the multi-rate control system in a seek operation in which the head is moved to the desired track on the disk. When the head has come close to the desired track and changes from seek control to track following control, the SM judging unit switches from the multi-rate control system to the single-rate control system. The single-rate control system performs track following control whereby the head is positioned in the range of the desired track.
摘要翻译：已经公开了由多速率控制系统和单速率控制系统的适当组合组成的高性能头部定位控制系统。 SM判断单元在磁头移动到磁盘上的期望磁道的寻道操作中选择多速率控制系统。当磁头已经接近所需的轨道并且从寻道控制变为追踪跟随控制时，SM判断单元从多速率控制系统切换到单速率控制系统。单速率控制系统执行跟踪跟踪控制，由此头位于期望轨道的范围内。

40. 发明授权

US06674606B1 Method and apparatus to normalize the acceleration constant 失效
标题翻译：加速常数归一化的方法和装置
公开(公告)号：US06674606B1
公开(公告)日：2004-01-06
申请号：US09723454
申请日：2000-11-27
申请人： Todd David Baumann
发明人： Todd David Baumann
IPC分类号： G11B5596
CPC分类号： G11B5/59605 , G11B5/59633
摘要： A method and apparatus for normalizing the acceleration constant used by a servo control system in a disc drive are disclosed. The method and apparatus involve performing a test seek and summing the position error measured at sample periods during the deceleration phase of the test seek. A correction factor applied to the acceleration constant is adjusted if the sum of the position errors differs from the sum of position errors measured from a nominal seek. Adjusting the correction factor to cause a position error sum that is close or equal to the sum from the nominal seek provides a relatively symmetrical seek arrival without additional correction factor offsets or gain variances.
摘要翻译：公开了一种用于对由盘驱动器中的伺服控制系统使用的加速常数进行归一化的方法和装置。该方法和装置包括在测试寻道的减速阶段期间执行测试寻求并求和在采样周期测量的位置误差。如果位置误差的总和不同于从标称寻道测量的位置误差的总和，则调整应用于加速常数的校正因子。调整校正因子以使位置误差和接近于或等于来自标称搜索的总和，从而提供相对对称的搜索到达，而无需附加的校正因子偏移或增益方差。

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