公开(公告)号：US06967799B1

公开(公告)日：2005-11-22

申请号：US10857468

申请日：2004-05-28

申请人： Tehri S. Lee

发明人： Tehri S. Lee

IPC分类号： G11B5/09 ,  G11B5/596 ,  G11B27/30

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

摘要： A disk drive is disclosed servo written from spiral tracks by generating a time-stamped sync mark detect signal processed by timing recovery firmware. A plurality of spiral tracks are written to the disk, wherein each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The head internal to the disk drive is used to read the spiral tracks, and a time-stamped sync mark detect signal is generated when one of the sync marks is detected. The time-stamped sync mark detect signal represents a time when the sync mark was detected relative to a servo write clock. A difference between the time-stamped sync mark detect signal and an expected time is computed in firmware to generate a coarse timing recovery measurement used to synchronize the servo write clock. The servo write clock and the head internal to the disk drive are used to write product servo sectors along a substantially circular target path.

摘要翻译： 公开了一种通过产生由定时恢复固件处理的时间戳同步标记检测信号从螺旋轨道写入的伺服驱动器。 多个螺旋轨迹被写入到盘中，其中每个螺旋轨道包括以预定间隔被同步标记中断的高频信号。 磁盘驱动器内部的磁头用于读取螺旋磁迹，并且当检测到其中一个同步标记时，产生时间戳的同步标记检测信号。 时间戳同步标记检测信号表示检测到相对于伺服写时钟的同步标记的时间。 在固件中计算时间戳同步标记检测信号与期望时间之间的差异，以产生用于同步伺服写入时钟的粗略定时恢复测量。 伺服写入时钟和磁盘驱动器内部的磁头用于沿着基本圆形的目标路径写入产品伺服扇区。

公开(公告)号：US06943978B1

公开(公告)日：2005-09-13

申请号：US10769680

申请日：2004-01-31

申请人： Tehri S. Lee

发明人： Tehri S. Lee

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/59655 ,  G11B5/59633 ,  G11B5/59661

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. A plurality of spiral tracks are written to the disk, wherein each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. During the product servo writing process, the sync marks in the spiral tracks are read to generate a coarse timing recovery measurement, and the high frequency signal in the spiral tracks is read to generate a fine timing recovery measurement. The coarse and fine timing recovery measurements are processed to synchronize a servo write clock used to write the product servo sectors to the disk. In one embodiment the control circuitry within the disk drive synchronizes the servo write clock by reading the spiral tracks, and in an alternative embodiment an external product servo writer synchronizes the servo write clock by reading the spiral tracks.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 多个螺旋轨迹被写入到盘中，其中每个螺旋轨道包括以预定间隔被同步标记中断的高频信号。 在产品伺服写入处理期间，读取螺旋轨道中的同步标记以产生粗略的定时恢复测量，并且读取螺旋轨道中的高频信号以产生精确的定时恢复测量。 粗略和精细的定时恢复测量被处理以使用于将产品伺服扇区写入盘的伺服写入时钟同步。 在一个实施例中，磁盘驱动器内的控制电路通过读取螺旋轨道来同步伺服写入时钟，并且在替代实施例中，外部产品伺服写入器通过读取螺旋轨道来同步伺服写入时钟。

公开(公告)号：US07859782B1

公开(公告)日：2010-12-28

申请号：US12122707

申请日：2008-05-18

申请人： Tehri S. Lee

发明人： Tehri S. Lee

IPC分类号： G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666 ,  G11B20/10009

摘要： A method is disclosed for demodulating a spiral servo track recorded on a disk of a disk drive. The spiral servo track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. A demodulation window is enabled relative to a spiral servo track crossing, and a plurality of sync marks are detected in a sync mark window of the demodulation window. A reliability metric is generated for each of the detected sync marks, wherein the reliability metrics are evaluated to select one of the detected sync marks. A clock is synchronized in response to the selected sync mark.

摘要翻译： 公开了用于解调记录在磁盘驱动器的磁盘上的螺旋式伺服磁道的方法。 螺旋伺服轨道包括以同步标记间隔由同步标记中断的高频信号。 相对于螺旋伺服磁道交叉使能解调窗口，并且在解调窗口的同步标记窗口中检测多个同步标记。 为每个检测到的同步标记生成可靠性度量，其中评估可靠性度量以选择检测到的同步标记之一。 响应于所选择的同步标记来同步时钟。

公开(公告)号：US07468855B1

公开(公告)日：2008-12-23

申请号：US11704430

申请日：2007-02-09

申请人： Siri S. Weerasooriya ,  Tehri S. Lee

发明人： Siri S. Weerasooriya ,  Tehri S. Lee

IPC分类号： G11B21/02 ,  G11B5/09 ,  G11B5/596

CPC分类号： G11B5/59655 ,  G11B5/59661 ,  G11B5/59666

摘要： A method is disclosed of writing product servo sectors to a disk of a disk drive to define a plurality of product servo wedges, the disk comprising a plurality of spiral tracks. The spiral tracks are spaced apart circumferentially by a substantially equal spacing, and the number of spiral tracks equals a non-integer multiple of product servo wedges. The head internal to the disk drive is used to read the spiral tracks to generate a read signal, and the sync marks are detected from the read signal to generate a sync mark detect signal. A timing recovery measurement is generated in response to the sync mark detect signal, and a frequency control signal is generated in response to the timing recovery measurement. A servo write clock is generated in response to the frequency control signal which is used to write the product servo sectors to the disk.

摘要翻译： 公开了一种将产品伺服扇区写入盘驱动器的盘以限定多个产品伺服楔的方法，该盘包括多个螺旋形轨道。 螺旋形轨道周向间隔开大致相等的间隔，并且螺旋轨道的数量等于产品伺服楔的非整数倍。 磁盘驱动器内部的头用于读取螺旋轨迹以产生读取信号，并且从读取信号检测同步标记以产生同步标记检测信号。 响应于同步标记检测信号产生定时恢复测量，并且响应于定时恢复测量而产生频率控制信号。 响应于用于将产品伺服扇区写入盘的频率控制信号产生伺服写入时钟。

公开(公告)号：US07301717B1

公开(公告)日：2007-11-27

申请号：US11018554

申请日：2004-12-20

申请人： Tehri S. Lee ,  Siri S. Weerasooriya

发明人： Tehri S. Lee ,  Siri S. Weerasooriya

IPC分类号： G11B5/09

CPC分类号： G11B5/59655 ,  G11B5/59661 ,  G11B5/59666 ,  G11B20/10222 ,  G11B20/12 ,  G11B20/14 ,  G11B2020/10916 ,  G11B2020/1281 ,  G11B2020/1287 ,  G11B2020/1484 ,  G11B2220/2516

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. The head internal to the disk drive is used to read the spiral tracks to generate a read signal. The read signal is integrated to generate a ramp signal, wherein a position error signal is generated from the ramp signal. The position error signal is used to maintain the head internal to the disk drive along a servo track while writing product servo sectors along the servo track.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括以同步标记间隔由同步标记中断的高频信号。 磁盘驱动器内部的磁头用于读取螺旋轨道以产生读取信号。 读信号被积分以产生斜坡信号，其中从斜坡信号产生位置误差信号。 位置误差信号用于沿着伺服轨道将磁盘驱动器内部保持在磁头内，同时沿着伺服磁道写入产品伺服扇区。

公开(公告)号：US07068459B1

公开(公告)日：2006-06-27

申请号：US10946462

申请日：2004-09-20

申请人： Robert L. Cloke ,  Siri S. Weerasooriya ,  Tehri S. Lee ,  Edgar D. Sheh ,  Wing Ying

发明人： Robert L. Cloke ,  Siri S. Weerasooriya ,  Tehri S. Lee ,  Edgar D. Sheh ,  Wing Ying

IPC分类号： G11B21/02 ,  G11B5/09 ,  G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  G11B5/59661

摘要： A method and apparatus is disclosed for writing product servo sectors to a disk of a disk drive to define a plurality of data tracks. The disk drive comprises the disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks which are read using the head to synchronize a write clock and to generate a position error signal (PES) according to a PES algorithm used to maintain the head along a first servo track while writing product servo sectors along the first servo track. The PES algorithm is adjusted to seek the head to a second servo track, and the head is used to write product servo sectors along the second servo track.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘以定义多个数据轨道的方法和装置。 磁盘驱动器包括磁盘和在盘上启动的磁头。 磁盘包括多个螺旋磁道，它们使用磁头读取以同步写时钟，并根据用于沿着第一伺服磁道保持磁头的PES算法产生位置误差信号（PES），同时沿着 第一个伺服轨道。 调整PES算法以寻找头到第二伺服轨道，并且头用于沿着第二伺服轨道写入乘积伺服扇区。

公开(公告)号：US07499236B1

公开(公告)日：2009-03-03

申请号：US11101910

申请日：2005-04-08

申请人： Tehri S. Lee ,  Siri S. Weerasooriya ,  Harry S. Hvostov

发明人： Tehri S. Lee ,  Siri S. Weerasooriya ,  Harry S. Hvostov

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59661

摘要： A method is disclosed for writing product servo sectors to the disk of a disk drive by demodulating spiral tracks recorded on the disk. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The high frequency signal is demodulated into a plurality of servo burst signals, and a position error signal is generated from the servo burst signals. A correlation between the position error signal and an off-track displacement of a head is calibrated, for example, by moving the head radially over the disk until the servo burst signals attain a first predetermined relationship, and then calibrating the correlation in response to the corresponding position error signal.

摘要翻译： 公开了一种通过解调记录在盘上的螺旋轨道将产品伺服扇区写入磁盘驱动器的盘的方法。 每个螺旋轨道包括通过同步标记以预定间隔中断的高频信号。 高频信号被解调为多个伺服脉冲串信号，并且从伺服脉冲串信号产生位置误差信号。 位置误差信号与头部的偏离轨迹位移之间的相关性被校准，例如通过将磁头径向移动到磁盘上直到伺服脉冲串信号达到第一预定关系，然后响应于 对应位置误差信号。

公开(公告)号：US07391583B1

公开(公告)日：2008-06-24

申请号：US11494240

申请日：2006-07-27

申请人： Edgar D. Sheh ,  Tehri S. Lee

发明人： Edgar D. Sheh ,  Tehri S. Lee

IPC分类号： G11B5/09 ,  G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59616 ,  G11B5/59644 ,  G11B5/59661 ,  G11B20/10037 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2020/1282 ,  G11B2020/1287

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The read signal from the head is processed to detect a plurality of the sync marks in a spiral track crossing. A timing recovery measurement is generated in response to a selected one of the sync marks based on reliability metrics, wherein a servo write clock is synchronized in response to the timing recovery measurement. The read signal representing the high frequency signal in the spiral track crossing is processed to generate a position error signal (PES) used to maintain the head along a substantially circular target path while using the servo write clock to write product servo sectors along the circular target path.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括以预定间隔被同步标记中断的高频信号。 来自头部的读取信号被处理以在螺旋轨迹交叉中检测多个同步标记。 基于可靠性度量响应于所选择的同步标记中的一个产生定时恢复测量，其中伺服写时钟响应于定时恢复测量而同步。 处理表示螺旋轨迹交叉中的高频信号的读取信号，以产生位置误差信号（PES），该位置误差信号（PES）用于沿着基本圆形的目标路径保持磁头，同时使用伺服写入时钟沿着圆形目标写入乘积伺服扇区 路径。

公开(公告)号：US07248426B1

公开(公告)日：2007-07-24

申请号：US10903522

申请日：2004-07-30

申请人： Siri S. Weerasooriya ,  Tehri S. Lee

发明人： Siri S. Weerasooriya ,  Tehri S. Lee

IPC分类号： G11B21/02

CPC分类号： G11B5/59655 ,  G11B5/59661 ,  G11B5/59666 ,  G11B20/10222 ,  G11B20/12 ,  G11B20/14 ,  G11B2020/10916 ,  G11B2020/1281 ,  G11B2020/1287 ,  G11B2020/1484 ,  G11B2220/2516

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. The sync marks in the spiral tracks are detected to synchronize a servo write clock used to open a demodulation window during which the high frequency signal in the spiral tracks is demodulated to generate a position error signal for maintaining the head along a first servo track while writing product servo sectors along the first servo track. The demodulation window is then shifted by an integer number of sync mark intervals to initiate a seek to a second servo track. The head is then used to write product servo sectors along the second servo track.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括以同步标记间隔由同步标记中断的高频信号。 检测螺旋轨道中的同步标记以同步用于打开解调窗口的伺服写入时钟，在该解调窗口期间解调螺旋轨道中的高频信号以产生位置误差信号，用于在写入时沿着第一伺服轨道保持磁头 产品伺服扇区沿着第一个伺服轨道。 然后将解调窗口移位整数个同步标记间隔，以启动对第二伺服轨道的寻道。 然后头部用于沿着第二伺服轨道写入产品伺服扇区。

公开(公告)号：US07068461B1

公开(公告)日：2006-06-27

申请号：US10998978

申请日：2004-11-29

申请人： Jack M. Chue ,  Siri S. Weerasooriya ,  Tehri S. Lee

发明人： Jack M. Chue ,  Siri S. Weerasooriya ,  Tehri S. Lee

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638

摘要： A disk drive is disclosed comprising a disk having a plurality of servo bursts written using perpendicular magnetic recording, wherein each servo burst is written at a servo burst frequency. A fill pattern is written between the servo bursts using perpendicular magnetic recording at a frequency substantially equal to an even harmonic of the servo burst frequency, and a phase shift occurs at the transition between the servo burst and the fill pattern. A head is actuated over the disk, and a sampling device samples a read signal emanating from the head to generate a sequence of read signal sample values. Control circuitry demodulates the servo bursts from the sequence of read signal sample values by computing a single-point Discrete Fourier Transform (DFT) at the servo burst frequency.

摘要翻译： 公开了一种磁盘驱动器，其包括具有使用垂直磁记录写入的多个伺服突发的盘，其中以伺服突发频率写入每个伺服脉冲串。 使用基本上等于伺服脉冲串频率的偶次谐波的频率的垂直磁记录在伺服脉冲串之间写入填充图案，并且在伺服脉冲串和填充图案之间的转变处发生相移。 头部被驱动到盘上，并且采样装置对从头部发出的读取信号进行采样以产生读取信号样本值的序列。 控制电路通过在伺服脉冲串频率处计算单点离散傅里叶变换（DFT），从读取信号采样值序列中解调伺服脉冲串。