公开(公告)号：US06198584B1

公开(公告)日：2001-03-06

申请号：US09070945

申请日：1998-04-30

申请人： Raffi Codilian ,  Ara W. Nazarian ,  Brian Tanner

发明人： Raffi Codilian ,  Ara W. Nazarian ,  Brian Tanner

IPC分类号： G11B509

CPC分类号： G11B5/5534 ,  G11B5/59655 ,  G11B5/59683

摘要： A disk drive with a disk having a servo pattern including a special “calibration track” wherein a plurality of staggered calibration burst pairs define null points that are radially shifted from a burst pair centerline by precise, predefined, fractional track amounts to collectively provide accurate information about servo signal values generated as a function of real displacement. The staggered calibration bursts beneficially allows for calibrating the PES signal after the drive is removed from the servowriter during a manufacturing phase called Intelligent Burn-In. The staggered calibration bursts are preferably written in data regions so that they are disposable and may be selectively written over with data to maximize storage space. Some or all of the calibration bursts may alternatively be retained for a subsequent recalibration.

摘要翻译： 具有盘的盘驱动器具有包括特殊的“校准轨迹”的伺服模式，其中多个交错的校准脉冲串对定义从脉冲串对中心线径向移位精确的，预定义的分数轨迹量的空点，以共同提供准确的信息 关于作为实际位移的函数产生的伺服信号值。 交错的校准脉冲串有利地允许在称为智能老化的制造阶段从伺服驱动器移除驱动器之后校准PES信号。 交错的校准突发优选地写入数据区域，使得它们是一次性的，并且可以选择性地写入数据以最大化存储空间。 备选地，可以保留部分或全部校准脉冲串用于随后的重新校准。

公开(公告)号：US5946157A

公开(公告)日：1999-08-31

申请号：US895248

申请日：1997-07-21

申请人： Raffi Codilian ,  Timothy Elliott ,  Ara W. Nazarian ,  Brian Tanner

发明人： Raffi Codilian ,  Timothy Elliott ,  Ara W. Nazarian ,  Brian Tanner

IPC分类号： G11B5/596 ,  G11B5/02

CPC分类号： G11B5/59633 ,  G11B5/59655 ,  G11B5/59683

摘要： The invention relates generally to rotating magnetic storage disk drive and, more particularly, to a method of seamlessly recording circumferentially overlapping servo bursts on a magnetic disk with successive passes of a write head that is guided by a servo track writer wherein the servo bursts are contained in at least two servo burst groups that each have at least one circumferential burst position which may contain a servo burst. The method comprises the steps of turning a write current ON while passing the write head over a current ramp region that does not contain servo data and is located in front of an "active" servo burst group that will be modified on this pass, modifying a servo burst in at least one circumferential position of the active servo burst group with the write current ON; turning the write current OFF while passing the write head over a current ramp region that does not contain servo data and is located in front of a "passive" servo burst group that will not be modified on this pass; and skipping over at least one circumferential burst position of the passive servo burst group with the write current OFF.

摘要翻译： 本发明一般涉及旋转磁存储盘驱动器，更具体地，涉及一种在磁盘上无缝地记录周向重叠的伺服脉冲串的方法，其中连续通过由伺服磁道写入器引导的写入头，其中包含伺服脉冲串 在至少两个伺服脉冲串组中，每个具有可包含伺服脉冲串的至少一个周期脉冲串位置。 该方法包括以下步骤：在写入头通过不包含伺服数据的电流斜坡区域并且位于将在该通路上被修改的“主动”伺服脉冲串组的前面时转动写入电流， 伺服脉冲串在有效伺服脉冲串组的至少一个圆周位置上写入电流ON; 在写入头通过不包含伺服数据的电流斜坡区域并且位于在该通过时将不被修改的“被动”伺服脉冲串组的前面时，转动写入电流OFF; 并且在写入电流OFF的情况下跳过被动伺服脉冲串组的至少一个圆周脉冲串位置。

公开(公告)号：US6014283A

公开(公告)日：2000-01-11

申请号：US856670

申请日：1997-05-15

申请人： Raffi Codilian ,  Ara W. Nazarian ,  David Dung Tien Nguyen

发明人： Raffi Codilian ,  Ara W. Nazarian ,  David Dung Tien Nguyen

IPC分类号： G11B5/00 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B2005/0016 ,  G11B5/59655 ,  G11B5/59683

摘要： A magnetic storage disk drive having a servo burst pattern which asymmetrically increases the linear region in which a read head may be micro-jogged from a burst pair center line to align the read head with a data track. The innovative servo pattern comprises a first pair of servo bursts that define a first burst pair centerline for writing a particular data track to a data track side of the first centerline, and a second pair of servo bursts collectively define a second burst pair centerline that is positioned to the data track side of the first burst pair centerline and is sufficiently close to the first burst pair center line so that the read head "sees" the second pair of servo bursts before "losing" the first pair of servo bursts when micro-jogged to the data track side for reading. The second burst pair centerline should be no farther from the first burst pair centerline than the linear read width of the read head. The preferred servo bursts span a full track pitch are arranged in a uniformly repeating pattern of A/B and C/D burst pairs. The first burst pair centerline may be defined by the A/B pairs in one annular disk region and by the C/D burst pairs in another annular disk region in order to asymmetrically expand the linear region in the direction needed for micro-jogging the read head in different directions within the respective annular regions.

摘要翻译： 具有伺服突发图案的磁存储盘驱动器，其不对称地增加读取头可以从脉冲串对中心线微点击以将读取头与数据轨道对准的线性区域。 创新的伺服模式包括第一对伺服突发，其定义用于将特定数据轨迹写入第一中心线的数据轨道侧的第一突发对中心线，第二对伺服脉冲串共同定义第二突发对中心线， 位于第一突发对中心线的数据轨道侧并且足够接近第一突发对中心线，使得读取头在“丢失”第一对伺服脉冲串之前“看到”第二对伺服脉冲串， 慢跑到数据轨道侧进行阅读。 第二个突发对中心线应该不比第一个突发对中心线远离读取头的线性读取宽度。 以A / B和C / D突发对的均匀重复模式布置跨越全轨道间距的优选伺服突发。 第一突发对中心线可以由一个环形盘区域中的A / B对和另一个环形盘区域中的C / D突发对来限定，以便在读取微步数所需的方向上不对称地扩展线性区域 在各个环形区域内以不同的方向头部。

公开(公告)号：US06445524B1

公开(公告)日：2002-09-03

申请号：US09458527

申请日：1999-12-20

申请人： Ara W. Nazarian ,  Raffi Codilian

发明人： Ara W. Nazarian ,  Raffi Codilian

IPC分类号： G11B2702

CPC分类号： G11B20/18 ,  G11B19/04 ,  G11B20/10009 ,  G11B2020/183

摘要： A method of operating a disk drive to efficiently recover from an event which interrupts a safe-to-write condition that occurs during a write operation includes receiving a string of data blocks for writing on respective addressable locations on a track of a disk in the disk drive. During a pass of the addressable locations under the read/write head, the head is positioned to follow the track within a tolerance limit and a first write operation is started to write the string of data blocks on the track. During the first write operation, if it is detected that a safe-to-write condition no longer exists, as may be triggered by a shock event, the first write operation is aborted. When it is later determined that the safe-to-write condition is asserted, a second write operation is defined to write a set of addressable locations within the string of data blocks which have yet to pass under the read/write head and the second write operation is performed. By performing the second write operation as soon as possible, the performance of the drive is improved.

摘要翻译： 一种操作磁盘驱动器以有效地从中断写入操作期间发生的安全写入状态的事件恢复的方法包括：在磁​​盘的磁盘的轨道上的相应可寻址位置上接收用于写入的一串数据块 驾驶。 在读/写头之下的可寻址位置的通过期间，头被定位成在公差限制内跟随轨道，并且开始第一写入操作以将轨迹上的数据块串写入。 在第一次写入操作期间，如果检测到不再存在安全写入条件，如冲击事件触发的那样，第一次写入操作被中止。 当稍后确定安全写入条件被确定时，定义第二写入操作以将一组可寻址位置写入在读/写头和第二写下尚未通过的数据块串中 执行操作。 通过尽快执行第二次写入操作，提高了驱动器的性能。

公开(公告)号：US6122133A

公开(公告)日：2000-09-19

申请号：US99485

申请日：1998-06-17

申请人： Ara W. Nazarian ,  Brian Tanner ,  Richard K. Wong

发明人： Ara W. Nazarian ,  Brian Tanner ,  Richard K. Wong

IPC分类号： G11B5/596

CPC分类号： G11B5/59655 ,  G11B5/59611

摘要： A method used to implement a sampled servo control system in a magnetic disk drive for generating a fractional track portion of a position error signal to correctably maintain the alignment of a read transducer (or associated write transducer) relative to a centerline of one of a plurality of a concentric data tracks upon a rotating data storage disk. The system uses a hybrid approach of determining a fractional track position by using a two-burst algorithm when possible and using a multi-burst algorithm only when necessary. The system is particularly suited to determining fraction track position when jogging a relatively narrow magnetoresistive read transducer with a servo pattern normally useful only for wider transducers, namely a pattern of four angularly sequential servo bursts A, B, C, D that are 100% of a track pitch in width and are arranged in quadrature. In this context, the preferred system reads all four 100% servo bursts and then uniquely selects between a two-burst algorithm and a four-burst algorithm to generate a fractional track position relative to a two-burst centerline (A/B or C/D) or a four-burst centerline (N-Q or N+Q). In general, the servo system selects between the two-burst and the four-burst algorithms based on the transducer's passing through a two-burst zone or a four-burst zone, which preferably overlap, as determined from the relative burst amplitudes of all four servo bursts. When operating at a position in which the zones overlap, the preferred system is biased to select the zone corresponding to the algorithm used during the immediately previous servo sample in order to add stability.

摘要翻译： 一种用于在磁盘驱动器中实现采样的伺服控制系统的方法，用于产生位置误差信号的分数轨迹部分，以便可修正地维持读取换能器（或相关联的写入传感器）相对于多个中心线的中心线的对准 的同心数据磁道在旋转数据存储盘上。 该系统使用混合方法，在可能时使用双脉冲串算法来确定分数轨道位置，并且仅在必要时使用多突发算法。 该系统特别适用于通过伺服模式点动相对较窄的磁阻读取换能器时，确定分数轨道位置，该伺服模式通常仅适用于较宽的换能器，即四个角度顺序的伺服脉冲串A，B，C，D的模式为100％ 宽度的轨道间距并且正交布置。 在这种情况下，优选的系统读取所有四个100％的伺服脉冲串，然后在双脉冲串算法和四脉冲串算法之间唯一地选择相对于两脉冲中心线（A / B或C / D）或四突发中心线（NQ或N + Q）。 通常，伺服系统基于换能器通过双脉冲区或四脉冲区，在双脉冲串和四脉冲串算法之间进行选择，该脉冲区或四脉冲区优选重叠，从所有四个脉冲的相对突发幅度确定 伺服突发。 当在区域重叠的位置操作时，优选系统被偏置以选择对应于在紧接的前一个伺服样本期间使用的算法的区域，以增加稳定性。

公开(公告)号：US07826167B2

公开(公告)日：2010-11-02

申请号：US12272482

申请日：2008-11-17

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：US07405899B2

公开(公告)日：2008-07-29

申请号：US11405872

申请日：2006-04-18

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.

公开(公告)号：US06614618B1

公开(公告)日：2003-09-02

申请号：US09538931

申请日：2000-03-31

申请人： Edgar D. Sheh ,  Thao P. Trieu ,  Ara W. Nazarian ,  Richard K. Wong

发明人： Edgar D. Sheh ,  Thao P. Trieu ,  Ara W. Nazarian ,  Richard K. Wong

IPC分类号： G11B5596

CPC分类号： G11B5/59633 ,  G11B5/5521

摘要： Disclosed is a disk drive having a plant with a moveable transducer and a servo controller that more precisely controls the transducer during short to medium seeks by producing a multi-rate feed-forward command effort signal. The servo controller includes a reference position generator that provides a reference position signal that varies as a function of time along a shaped position profile for moving the transducer from a start position to a target position in a smoothly controlled fashion, a feed-forward control path that receives the reference position signal and applies a feed-forward command effort signal at a feed-forward rate that is greater than the servo sampling rate to move the actuator more closely along the shaped position profile between servo samples; and a feedback control path that receives the reference position signal and the indicated position signal and applies a feedback command effort signal at the servo sampling rate based on a difference between the reference position signal and the indicated position signal to make minor corrections to error remaining after application of prior feed-forward command effort signals.

摘要翻译： 公开了具有具有可移动换能器和伺服控制器的设备的磁盘驱动器，其通过产生多速率前馈命令工作信号来在短到中等搜索期间更精确地控制换能器。 该伺服控制器包括一个参考位置发生器，该基准位置发生器提供一个参考位置信号，该基准位置信号沿着一个成形位置轮廓作为时间的函数变化，用于以平滑控制的方式将换能器从起始位置移动到目标位置;前馈控制路径 其接收参考位置信号并且以大于伺服采样速率的前馈速率施加前馈命令努力信号，以沿着伺服样本之间的成形位置分布更紧密地移动致动器; 以及反馈控制路径，其接收参考位置信号和所指示的位置信号，并且基于参考位置信号和指示位置信号之间的差以伺服采样率施加反馈命令努力信号，以对 应用先前的前馈命令工作信号。

公开(公告)号：US4685007A

公开(公告)日：1987-08-04

申请号：US564021

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： G11B5/55 ,  G11B21/08

CPC分类号： G11B5/5547

摘要： A low cost disk drive system includes track zero information located in a single sector on the disk surface. The information is comprised of a first type of signal located in tracks to one side of an arbitrary reference track and a second type of signal located in the tracks to the other side of the arbitrary reference track. The magnetic head of the disk drive system is moved radially with respect to the disk and the transition between the signals detected in order to locate the head at the reference track.

摘要翻译： 低成本磁盘驱动器系统包括位于磁盘表面上的单个扇区中的磁道零信息。 信息包括位于任意参考轨道一侧的轨道中的第一类型的信号和位于任意参考轨道的另一侧的轨道中的第二类型的信号。 磁盘驱动系统的磁头相对于磁盘径向地移动，并且检测到的信号之间的转变以便将磁头定位在参考磁道上。

公开(公告)号：US20090067084A1

公开(公告)日：2009-03-12

申请号：US12272482

申请日：2008-11-17

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

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。