公开(公告)号：US20080204926A1

公开(公告)日：2008-08-28

申请号：US11677854

申请日：2007-02-22

申请人： Mario Blaum ,  Mantle Yu ,  Bruce Wilson

发明人： Mario Blaum ,  Mantle Yu ,  Bruce Wilson

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B20/1217 ,  G11B2020/1281 ,  G11B2220/2516

摘要： Techniques are provided for identifying the servo sectors in a track on a data storage device. A data storage device identifies the servo sectors in a track by reading distributed index bits from multiple servo sectors in a track. The data storage device analyzes only one index bit from each servo sector to identify the index of a track. In some embodiments, the index of a track can be identified after examining the index bits stored in a particular number of consecutive servo sectors, even in the presence of errors. The index bits in each track can have an error tolerance with a minimum Hamming distance greater than one. In other embodiments, a data storage device compares a sliding window of the index bits read from the servo sectors to all possible N-bit vectors that exist within a pattern of the index bits stored on a track.

摘要翻译： 提供了用于识别数据存储设备上的轨道中的伺服扇区的技术。 数据存储装置通过从轨道中的多个伺服扇区读取分布式索引位来识别轨道中的伺服扇区。 数据存储设备仅分析来自每个伺服扇区的一个索引位以识别轨道的索引。 在一些实施例中，即使存在错误，也可以在检查存储在特定数量的连续伺服扇区中的索引位之后识别轨道的索引。 每个轨道中的索引位可以具有大于1的最小汉明距离的误差容差。 在其他实施例中，数据存储装置将从伺服扇区读取的索引位的滑动窗口与存储在轨道上的索引位的模式中存在的所有可能的N位向量进行比较。

公开(公告)号：US07869152B2

公开(公告)日：2011-01-11

申请号：US11677854

申请日：2007-02-22

申请人： Mario Blaum ,  Mantle Yu ,  Bruce Wilson

发明人： Mario Blaum ,  Mantle Yu ,  Bruce Wilson

IPC分类号： G11B5/09

CPC分类号： G11B5/59688 ,  G11B20/1217 ,  G11B2020/1281 ,  G11B2220/2516

摘要： Techniques are provided for identifying the servo sectors in a track on a data storage device. A data storage device identifies the servo sectors in a track by reading distributed index bits from multiple servo sectors in a track. The data storage device analyzes only one index bit from each servo sector to identify the index of a track. In some embodiments, the index of a track can be identified after examining the index bits stored in a particular number of consecutive servo sectors, even in the presence of errors. The index bits in each track can have an error tolerance with a minimum Hamming distance greater than one. In other embodiments, a data storage device compares a sliding window of the index bits read from the servo sectors to all possible N-bit vectors that exist within a pattern of the index bits stored on a track.

摘要翻译： 提供了用于识别数据存储设备上的轨道中的伺服扇区的技术。 数据存储装置通过从轨道中的多个伺服扇区读取分布式索引位来识别轨道中的伺服扇区。 数据存储设备仅分析来自每个伺服扇区的一个索引位以识别轨道的索引。 在一些实施例中，即使存在错误，也可以在检查存储在特定数量的连续伺服扇区中的索引位之后识别轨道的索引。 每个轨道中的索引位可以具有大于1的最小汉明距离的误差容差。 在其他实施例中，数据存储装置将从伺服扇区读取的索引位的滑动窗口与存储在轨道上的索引位的模式中存在的所有可能的N位向量进行比较。

公开(公告)号：US20050068663A1

公开(公告)日：2005-03-31

申请号：US10676632

申请日：2003-09-30

申请人： Mario Blaum ,  Mantle Yu

发明人： Mario Blaum ,  Mantle Yu

IPC分类号： G11B5/596 ,  G11B19/02

CPC分类号： G11B5/59627

摘要： A method for operating a disk drive having timing marks (TMs) on the disk that are chosen to reduce the probability of misidentification of a TM in the presence of read errors. The disk drive searches for TMs within a fixed TM search window which extends past the TM on the disk. A TM preferably maximizes the post-shift sliding distance for m post-shifts of the TM pattern, where m corresponds to the TM search window boundary. In this manner, the probability of a misidentification of the TM due to a post-shift having a small distance from the TM pattern is reduced. The TM pattern also provides pre-shift error resistance.

摘要翻译： 一种用于操作具有在盘上的定时标记（TM）的磁盘驱动器的方法，所述定时标记（TM）被选择为在存在读取错误的情况下降低TM的错误识别的可能性。 磁盘驱动器在固定的TM搜索窗口中搜索延伸超过TM上的TM的TM。 TM TM优选地最大化TM模式的m个移位之后的移位后滑动距离，其中m对应于TM搜索窗口边界。 以这种方式，由于与TM图案之间的距离较小的移位后的TM的误识别的可能性降低。 TM模式还提供了前移误差电阻。

公开(公告)号：US20050068651A1

公开(公告)日：2005-03-31

申请号：US10676482

申请日：2003-09-30

申请人： Mario Blaum ,  Mantle Yu

发明人： Mario Blaum ,  Mantle Yu

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/596 ,  G11B20/18 ,  G11B21/02 ,  G11B27/30

CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B27/3027 ,  G11B2005/001 ,  G11B2220/20

摘要： A disk drive has timing marks (TMs) on the disk, that are chosen to reduce the probability of misidentification of a TM in the presence of read errors. The disk drive searches for TMs within a fixed TM search window which extends past the TM on the disk. A TM preferably maximizes the post-shift sliding distance for m post-shifts of the TM pattern, where m corresponds to the TM search window boundary. In this manner, the probability of a misidentification of the TM due to a post-shift having a small distance from the TM pattern is reduced. The TM pattern also provides pre-shift error resistance.

摘要翻译： 磁盘驱动器在磁盘上具有定时标记（TM），该定时标记被选择为在存在读取错误的情况下降低TM错误识别的可能性。 磁盘驱动器在固定的TM搜索窗口中搜索延伸超过TM上的TM的TM。 TM TM优选地最大化TM模式的m个移位之后的移位后滑动距离，其中m对应于TM搜索窗口边界。 以这种方式，由于与TM图案之间的距离较小的移位后的TM的误识别的可能性降低。 TM模式还提供了前移误差电阻。

公开(公告)号：US20050218846A1

公开(公告)日：2005-10-06

申请号：US10816588

申请日：2004-03-31

申请人： Michael Moser ,  Bryan Rowan ,  Mantle Yu

发明人： Michael Moser ,  Bryan Rowan ,  Mantle Yu

IPC分类号： G11B19/20 ,  G11B19/28 ,  G11B21/10 ,  H02P3/14 ,  H02P6/24

CPC分类号： G11B19/20 ,  G11B19/28 ,  H02P6/24

摘要： During normal operation of a hard disk drive, control logic controls a plurality of switching elements to provide electrical power to a spindle motor and head motor of the disk drive from a voltage source coupled to first and second voltage supply nodes (e.g., Vcc and ground), the spindle motor has a set of motor windings to which the electric power is applied to rotate the spindle motor, and the control logic is configured to enter a regenerative braking state during normal operation where the switching elements are controlled to isolate the spindle motor from the first voltage supply node and cause regenerative braking of the spindle motor so that kinetic energy due to rotation of the spindle motor is converted to electrical power that is supplied to the head motor by virtue of inductance of one or more motor windings in the set.

摘要翻译： 在硬盘驱动器的正常操作期间，控制逻辑控制多个开关元件，以从耦合到第一和第二电压供应节点（例如，Vcc和地面）的电压源向主动马达和磁盘驱动器的磁头马达提供电力 ），主轴电机具有一组电动机绕组，施加电力以使主轴电动机旋转，并且控制逻辑被配置为在正常操作期间进入再生制动状态，其中开关元件被控制以隔离主轴电动机 从第一电压供应节点引起主轴电动机的再生制动，使得由于主轴电动机的旋转而产生的动能由于集合中的一个或多个电动机绕组的电感而被转换为供给到头电动机的电力 。

公开(公告)号：US07551379B2

公开(公告)日：2009-06-23

申请号：US11545830

申请日：2006-10-10

申请人： Mantle Yu ,  Bernd Lamberts

发明人： Mantle Yu ,  Bernd Lamberts

IPC分类号： G11B5/09

CPC分类号： G11B23/36 ,  G11B5/3967 ,  G11B5/59633 ,  G11B19/02

摘要： Embodiments of the present invention provide a magnetic disk drive system in which the write element leads the read element in the tangential direction of rotation of the magnetic disk. In addition, the servo sector information is preferably arranged such that information that is not needed for write operation is placed at the end of the servo sector. In this way, the servo read operation can be terminated sooner and the write operation can initiate sooner after going over the servo sector. The write element in a write operation writes data to the data sector of a track until an end of the data sector before reaching a front end of a servo sector following the end of the data sector. The read element reads information in the servo sector needed for the write operation. The write element starts writing data in a next data sector following the servo sector after the write element reaches the next data sector and after the read element has read all information in the servo sector needed for the write operation.

摘要翻译： 本发明的实施例提供一种磁盘驱动系统，其中写入元件沿着磁盘的切向旋转方向引导读取元件。 此外，伺服扇区信息优选地布置成使得写操作不需要的信息被放置在伺服扇区的末端。 以这种方式，可以更快地终止伺服读取操作，并且可以在经过伺服扇区之后更快地启动写入操作。 写操作中的写元件将数据写入轨道的数据扇区，直到数据扇区的末尾，在数据扇区结束之后到达伺服扇区的前端。 读取元件读取写入操作所需的伺服扇区中的信息。 在写入元件到达下一个数据扇区之后以及在读取元件读取写入操作所需的伺服扇区中的所有信息之后，写入元件开始在伺服扇区之后的下一个数据扇区中写入数据。

公开(公告)号：US07309967B2

公开(公告)日：2007-12-18

申请号：US10816588

申请日：2004-03-31

申请人： Michael A. Moser ,  Bryan S. Rowan ,  Mantle Yu

发明人： Michael A. Moser ,  Bryan S. Rowan ,  Mantle Yu

IPC分类号： H02P3/14 ,  H02P3/18

CPC分类号： G11B19/20 ,  G11B19/28 ,  H02P6/24

摘要： During normal operation of a hard disk drive, control logic controls a plurality of switching elements to provide electrical power to a spindle motor and head motor of the disk drive from a voltage source coupled to first and second voltage supply nodes (e.g., Vcc and ground), the spindle motor has a set of motor windings to which the electric power is applied to rotate the spindle motor, and the control logic is configured to enter a regenerative braking state during normal operation where the switching elements are controlled to isolate the spindle motor from the first voltage supply node and cause regenerative braking of the spindle motor so that kinetic energy due to rotation of the spindle motor is converted to electrical power that is supplied to the head motor by virtue of inductance of one or more motor windings in the set.

摘要翻译： 在硬盘驱动器的正常操作期间，控制逻辑控制多个开关元件，以从耦合到第一和第二电压供应节点（例如，Vcc和地面）的电压源向主动马达和磁盘驱动器的磁头马达提供电力 ），主轴电机具有一组电动机绕组，施加电力以使主轴电动机旋转，并且控制逻辑被配置为在正常操作期间进入再生制动状态，其中开关元件被控制以隔离主轴电动机 从第一电压供应节点引起主轴电动机的再生制动，使得由于主轴电动机的旋转而产生的动能由于集合中的一个或多个电动机绕组的电感而被转换为供给到头电动机的电力 。

公开(公告)号：US20080084629A1

公开(公告)日：2008-04-10

申请号：US11545830

申请日：2006-10-10

申请人： Mantle Yu ,  Bernd Lamberts

发明人： Mantle Yu ,  Bernd Lamberts

IPC分类号： G11B15/12

CPC分类号： G11B23/36 ,  G11B5/3967 ,  G11B5/59633 ,  G11B19/02

摘要： Embodiments of the present invention provide a magnetic disk drive system in which the write element leads the read element in the tangential direction of rotation of the magnetic disk. In addition, the servo sector information is preferably arranged such that information that is not needed for write operation is placed at the end of the servo sector. In this way, the servo read operation can be terminated sooner and the write operation can initiate sooner after going over the servo sector. The write element in a write operation writes data to the data sector of a track until an end of the data sector before reaching a front end of a servo sector following the end of the data sector. The read element reads information in the servo sector needed for the write operation. The write element starts writing data in a next data sector following the servo sector after the write element reaches the next data sector and after the read element has read all information in the servo sector needed for the write operation.

摘要翻译： 本发明的实施例提供一种磁盘驱动系统，其中写入元件沿着磁盘的切向旋转方向引导读取元件。 此外，伺服扇区信息优选地布置成使得写操作不需要的信息被放置在伺服扇区的末端。 以这种方式，可以更快地终止伺服读取操作，并且可以在经过伺服扇区之后更快地启动写入操作。 写操作中的写元件将数据写入轨道的数据扇区，直到数据扇区的末尾，在数据扇区结束之后到达伺服扇区的前端。 读取元件读取写入操作所需的伺服扇区中的信息。 在写入元件到达下一个数据扇区之后以及在读取元件读取写入操作所需的伺服扇区中的所有信息之后，写入元件开始在伺服扇区之后的下一个数据扇区中写入数据。

公开(公告)号：US06313964B1

公开(公告)日：2001-11-06

申请号：US09159820

申请日：1998-09-23

申请人： Bernd Lamberts ,  Mantle Yu

发明人： Bernd Lamberts ,  Mantle Yu

IPC分类号： G11B2102

CPC分类号： G11B5/5556 ,  G11B21/025

摘要： In a disk drive system, a servo controller is operative to perform a process of inhibiting write operations for writing data to tracks of a disk during a head settling period following a track seek operation. During each of a first plurality of sampling intervals transpiring during a first time period, the servo controller determines a present position value indicative of the position of the head during the present sampling interval, and also determines a predicted position value indicative of the position of the head during a subsequent sampling interval. Also during each of the first plurality of sampling intervals, the servo controller determines: whether the present position value is within a first error margin from the center of a target track; and whether the predicted position value is within the first error margin. If the present position value and the predicted position value are both within the first error margin, the servo controller enables write operations. During each of a second plurality of the sampling intervals transpiring during a second time period, the servo controller determines a predicted position value indicative of the position of the head during a subsequent sampling interval. Also during each of the second plurality of sampling intervals, the servo controller determines whether the predicted position value is within a second error margin from the center of the target track. If the predicted position value is not within the second error margin, the servo controller inhibits write operations.

摘要翻译： 在磁盘驱动器系统中，伺服控制器可操作以执行在跟踪寻道操作之后的磁头建立周期期间禁止写入数据到磁盘轨道的写操作的处理。 在第一时间段期间发生的第一多个采样间隔的每一个期间，伺服控制器在当前采样间隔期间确定指示头部的位置的当前位置值，并且还确定指示该位置的预测位置值， 在随后的采样间隔期间。 此外，在第一多个采样间隔的每一个期间，伺服控制器确定：当前位置值是否在距离目标轨道的中心的第一误差范围内; 以及预测位置值是否在第一误差范围内。 如果当前位置值和预测位置值都在第一误差范围内，则伺服控制器启用写入操作。 在第二时间段期间发生的第二多个采样间隔的每一个期间，伺服控制器在随后的采样间隔期间确定指示头部的位置的预测位置值。 此外，在第二多个采样间隔的每一个期间，伺服控制器确定预测位置值是否在距离目标轨道的中心的第二误差范围内。 如果预测位置值不在第二误差范围内，则伺服控制器禁止写操作。

公开(公告)号：US20050219737A1

公开(公告)日：2005-10-06

申请号：US10815314

申请日：2004-04-01

申请人： Craig Fukushima ,  Kevin Tzou ,  Mantle Yu

发明人： Craig Fukushima ,  Kevin Tzou ,  Mantle 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。