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21. 发明授权

US5825579A Disk drive servo sensing gain normalization and linearization 失效
标题翻译：磁盘驱动器伺服检测增益归一化和线性化
公开(公告)号：US5825579A
公开(公告)日：1998-10-20
申请号：US628217
申请日：1996-04-04
申请人： Wayne Leung Cheung , Donald L. Clare , Louis Joseph Serrano
发明人： Wayne Leung Cheung , Donald L. Clare , Louis Joseph Serrano
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/5552 , G11B5/59633
摘要： An apparatus, system and method are described for generating a continuous and linear position signal generated from stitched position error signal (PES) components, for use by a servo control system in positioning a transducer with respect to a storage surface. Continuity is achieved by providing a normalization stage in the servo control loop for correcting discontinuities at the stitch points with minimal impact to the PES zero-crossing points. According to a first preferred embodiment normalization is applied using an algorithm determined by the width of the read transducer. According to a second preferred embodiment, normalization is selectively applied near the stitch points of the PES components, but is not applied at their zero-crossing points. In another preferred embodiment, a first normalization algorithm is applied near the stitch points, and a second normalization algorithm is applied at the zero-crossing points. In a fourth embodiment, a smoothing function is applied between the stitch points and zero-crossings to smooth the transition from normalized to unnormalized signal contributions or from signal contributions normalized in a first manner to signal contributions normalized in a second manner. A further aspect of the present invention is to determine whether the PES exceeds a nominal value and if so, to hold the PES at the nominal value at each stitch point.
摘要翻译：描述了一种用于产生从缝合位置误差信号（PES）分量产生的连续和线性位置信号的装置，系统和方法，供伺服控制系统在相对于存储表面定位换能器时使用。通过在伺服控制回路中提供归一化阶段来实现连续性，以在针对PES过零点的影响最小的情况下对针迹点的不连续性进行校正。根据第一优选实施例，使用由读换能器的宽度确定的算法来应用归一化。根据第二优选实施例，在PES部件的针迹点附近选择性地施加归一化，但是不在它们的过零点施加归一化。在另一个优选实施例中，在缝合点附近施加第一归一化算法，并且在过零点应用第二归一化算法。在第四实施例中，在缝合点和过零点之间施加平滑函数，以平滑从归一化到非归一化信号贡献的转换或者以第一方式归一化为以第二方式归一化的信号贡献的信号贡献。本发明的另一方面是确定PES是否超过标称值，如果是，则在每个针迹点处将PES保持在标称值。

22. 发明授权

US5781363A Servo-free velocity estimator for coil driven actuator arm in a data storage drive 失效
公开(公告)号：US5781363A
公开(公告)日：1998-07-14
申请号：US732554
申请日：1996-10-15
申请人： Bryan S. Rowan , Louis Joseph Serrano
发明人： Bryan S. Rowan , Louis Joseph Serrano
IPC分类号： G11B5/55 , G11B21/08 , G11B33/10 , G11B5/596
CPC分类号： G11B5/5547 , G11B21/081 , G11B21/083 , G11B5/5534 , G11B33/10
摘要： A system and method for determining the velocity and/or position of a coil driven actuator arm without the aid of servo signals. A sample-hold unit is used to measure no-motion coil voltage in the voice motor coil while applying a predetermined coil current. Then, while the same magnitude (opposite direction) current is applied to move the actuator arm, the coil voltage is measured. The coil voltage is reduced by the measured no-motion coil voltage, producing a measurement of back-emf. The back-emf may be amplified by a predetermined factor to yield an estimation of velocity, and this amount may be integrated to provide a gauge of relative actuator arm position.

23. 发明授权

US5761007A Disk drive with multiple actuators on a single axis having different inertia characteristics 失效
标题翻译：在单轴上具有多个执行器的磁盘驱动器具有不同的惯性特性
公开(公告)号：US5761007A
公开(公告)日：1998-06-02
申请号：US795090
申请日：1997-02-05
申请人： Kirk Barrows Price , Louis Joseph Serrano , Mantle Man-Hon Yu
发明人： Kirk Barrows Price , Louis Joseph Serrano , Mantle Man-Hon Yu
IPC分类号： G11B5/48 , G11B21/08 , G11B5/55
CPC分类号： G11B21/083 , G11B5/4813
摘要： Disclosed is a data recording disk file having multiple actuators mounted on a common pivot axis, one of the actuators having fewer arms and lower inertia characteristics than the other. A servo system separately drives each of the actuators for seek repositioning, the lower inertia actuator having a higher performance than the other. A controller selectively records one type of data on the data surfaces associated with the lower inertia actuator, and records all other data on the other data surfaces, thereby providing a disk drive with increased performance appropriate to the data stored on the surfaces associated with the lower inertia actuator. A removable locking pin may be provided which extends through corresponding holes in each of the actuators for maintaining the actuators precisely positioned with respect to each other so that servo information may be written on each of the surfaces in a single process. Additionally, one of the actuators may be provided with a shorter stroke than the other actuators. Further, the tracks of the data surfaces associated with one of the actuators may have a different track pitch than the other data surfaces.
摘要翻译：公开了一种数据记录盘文件，其具有安装在公共枢转轴线上的多个致动器，其中一个致动器具有较少的臂并且具有比另一个低的惯性特性。伺服系统分别驱动每个致动器用于寻找重新定位，下惯性致动器具有比另一个更高的性能。控制器选择性地将一种类型的数据记录在与下惯性致动器相关联的数据表面上，并将所有其它数据记录在其他数据表面上，从而提供具有适合于存储在与较低级惯性致动器。可以提供可拆卸的锁定销，其延伸穿过每个致动器中的对应的孔，用于维持执行器相对于彼此精确定位，使得可以在单个过程中在每个表面上写入伺服信息。另外，致动器中的一个可以具有比其他致动器更短的行程。此外，与一个致动器相关联的数据表面的轨迹可以具有与其他数据表面不同的轨道间距。

24. 发明授权

US5757567A Method and apparatus for servo control with high efficiency gray code for servo track ID 失效
标题翻译：伺服控制伺服控制的方法和装置，用于伺服磁道ID的高效格雷码
公开(公告)号：US5757567A
公开(公告)日：1998-05-26
申请号：US598486
申请日：1996-02-08
申请人： Steven Robert Hetzler , Louis Joseph Serrano
发明人： Steven Robert Hetzler , Louis Joseph Serrano
IPC分类号： G11B5/596 , G11B20/14 , G11B5/09
CPC分类号： G11B20/1426 , G11B5/59633
摘要： A gray code is provided for use with disk servo track identification encodement that preserves the gray code property of only a single digit changing state between two numbers in the code sequence and also preserves magnetization between code numbers while only requiring a single bit for encoding each code value by recording a single pad bit before the gray code bits. By proper selection of the sign of the pad bit and the gray code numbering sequence, the gray code encodement scheme uses n+1 code bits for an n-bit gray code. The efficiency of the gray code encodement can be enhanced by splitting the track identification number to be recorded into multiple fields and then recording only the low order bits sufficient to identify a track within the maximum estimated error of the servo head on every track and otherwise alternating the high and low middle order bit fields with the low order bit field. A run-length limiting feature also can be provided. One way is for the encoded bits to be broken into fields so that only two are written in each sector. The two fields are concatenated and encoded so that the length of the field is shorter than the run-length limit. Alternatively, the code sequence can be obtained as a subsequence of a larger sequence. This subsequence then obeys the run-length limit.
摘要翻译：提供了用于磁盘伺服磁道识别编码的灰度代码，其保留代码序列中两个数字之间仅一个数字改变状态的灰度代码属性，并且还保留代码号之间的磁化，同时仅需要单个位来编码每个代码通过在灰色代码位之前记录单个填充位来计算值。通过适当选择填充位的符号和灰色编号序列，灰度编码方案对n位灰度代码使用n + 1个码位。可以通过将要记录的轨道识别号分割成多个场，然后仅记录足以识别在每个轨道上的伺服头的最大估计误差内的轨道，否则交替地记录灰度代码编码的效率，具有低位位字段的高中低位位字段。还可以提供游程长度限制功能。一种方法是将编码的比特分成字段，以便每个扇区只写入两个比特。这两个字段被连接和编码，使得字段的长度比游程长度限制短。或者，代码序列可以作为较大序列的子序列获得。这个子序列然后服从游程长度限制。

25. 发明授权

US06563657B1 Multiple and reconfigurable data access and storage device using multiple actuators 失效
标题翻译：多重和可重新配置的数据访问和存储设备使用多个执行器
公开(公告)号：US06563657B1
公开(公告)日：2003-05-13
申请号：US09676604
申请日：2000-09-29
申请人： Louis Joseph Serrano , Mantle Man-Hon Yu , Kirk Barrows Price
发明人： Louis Joseph Serrano , Mantle Man-Hon Yu , Kirk Barrows Price
IPC分类号： G11B509
CPC分类号： G11B5/5547 , G11B5/5578
摘要： A hard disk drive for a computer system has at least two actuators for reading data from or writing data to the disks. The actuators may be configured to support the different methods of data access required of them. For example, if large quantities of sequential data are performed, one operation uses both actuators to increase throughput. However, if mostly random operations are to be performed, then independent usage of the actuators is preferred. These two methods of usage can be supported simultaneously, and can even be dictated by the user. The tracking format of the actuators can be configured such that the next logical track is physically located under a head on a different actuator to improve sequential operation. The actuators also may be utilized in a dual-channel configuration so that data can be written to both actuators at the same time, or read back at the same time to improve throughput. In addition, either of these configurations can be selected on a transfer-by-transfer basis by the user.
摘要翻译：用于计算机系统的硬盘驱动器具有用于从数据读取数据或向盘写入数据的至少两个致动器。致动器可以被配置为支持它们所需的不同的数据访问方法。例如，如果执行大量的顺序数据，则一个操作使用两个致动器来增加吞吐量。然而，如果要执行大多数随机操作，则优选致动器的独立使用。这两种使用方法可以同时支持，甚至可以由用户来决定。致动器的跟踪格式可以被配置成使得下一逻辑轨道物理上位于不同致动器的头部下方以改进顺序操作。致动器还可以用于双通道配置，以便可以同时将数据写入两个致动器，或者同时回读以提高吞吐量。另外，这些配置中的任何一个可以由用户按传送方式选择。

26. 发明授权

US06469855B1 Method and system for adaptive settle and write inhibit constraints based on head geometry and servo/mechanical system 有权
标题翻译：基于头几何和伺服/机械系统的自适应稳定和写禁止约束的方法和系统
公开(公告)号：US06469855B1
公开(公告)日：2002-10-22
申请号：US09302550
申请日：1999-04-30
申请人： Bernd Lamberts , Mantle Man-Hon Yu , Louis Joseph Serrano
发明人： Bernd Lamberts , Mantle Man-Hon Yu , Louis Joseph Serrano
IPC分类号： G11B1504
CPC分类号： G11B5/59605 , G11B5/012
摘要： A method and system in accordance with the present invention for minimizing the loss of data by a write head is disclosed. The method comprises providing a desired write head width based upon a hard error rate. The method further comprises adjusting at least one parameter of the servo control logic based upon a comparison of the width of the write head and the desired write head width, wherein the write head will not exceed the hard error rate when writing data. Through the use of a system and method in accordance with the present invention a servo system can be designed based on a constant hard error rate. The write inhibit window and the settle delay for writing operations in a servo system will be optimized, based on the hard error rate, for each individual head in the disk drive configuration. This will increase the speed of the servo process without affecting the reliability of the data.
摘要翻译：公开了一种根据本发明的用于使写入头损失数据最小化的方法和系统。该方法包括基于硬错误率提供期望的写入头宽度。该方法还包括基于写入头的宽度与期望的写入头宽度的比较来调整伺服控制逻辑的至少一个参数，其中写入头在写入数据时不会超过硬错误率。通过使用根据本发明的系统和方法，可以基于恒定的硬错误率来设计伺服系统。基于磁盘驱动器配置中的每个单独磁头的硬错误率，将对伺服系统中的写入禁止窗口和写入操作的稳定延迟进行优化。这将提高伺服过程的速度，而不影响数据的可靠性。

27. 发明授权

US06462898B2 Disk drive with information encoded in the position error signal fields 失效
标题翻译：磁盘驱动器，其信息编码在位置误差信号字段中
公开(公告)号：US06462898B2
公开(公告)日：2002-10-08
申请号：US09097994
申请日：1998-06-16
申请人： Mario Blaum , William John Kabelac , Louis Joseph Serrano , Mantle Man-Hon Yu
发明人： Mario Blaum , William John Kabelac , Louis Joseph Serrano , Mantle Man-Hon Yu
IPC分类号： G11B5596
CPC分类号： G11B20/1803 , G11B5/59611 , G11B2220/20
摘要： There is disclosed an error correction and detection method and apparatus for retreiving predetermined data, e.g. servo data, from the position error signal (PES) fields of a disk in a data storage system . In the preferred embodiment the PES data such as the track number is mapped into codewords of an error correction code (ECC) which are then further divided into a set of symbols which are mapped onto a second set of bit vectors which have a constant weight. The preferred encoding method is selected to equalize the analog signal characteristics of the PES fields so that minimal, if any, change in the conventional servo detection circuitry needed to use the PES fields of the invention both as analog and digital information.
摘要翻译：公开了用于检索预定数据的纠错和检测方法和装置，例如，伺服数据，来自数据存储系统中的盘的位置误差信号（PES）字段。在优选实施例中，诸如轨道号的PES数据被映射到纠错码（ECC）的码字中，然后这些码字被进一步划分成映射到具有恒定权重的第二组比特矢量的一组码元。选择优选的编码方法以均衡PES场的模拟信号特性，使得将本发明的PES场用作模拟和数字信息所需的常规伺服检测电路中的最小（如果有的话）改变。

28. 发明授权

US06226140B1 Shock detector in a disk drive servo control system 失效
标题翻译：震动检测器在磁盘驱动器伺服控制系统中
公开(公告)号：US06226140B1
公开(公告)日：2001-05-01
申请号：US09115490
申请日：1998-07-14
申请人： Louis Joseph Serrano , Mantle Man-Hon Yu
发明人： Louis Joseph Serrano , Mantle Man-Hon Yu
IPC分类号： G11B1904
CPC分类号： G11B19/04 , G11B5/59694
摘要： A direct access storage device (DASD) servo control system detects a servo pattern recorded in multiple cells of a servo sector and compares the cell-to-cell readback signal independently of the position error signal (PES). A servo sector of the disk contains multiple servo identification cells such that a servo readback signal is generated for each cell. If the servo signal data from two successive cells of a single sector, or from the same cell of successive sectors, differs by an amount greater than a predetermined error threshold, then a physical jarring or shock is indicated and the servo control system causes a write inhibit command to the write channel.
摘要翻译：直接访问存储设备（DASD）伺服控制系统检测记录在伺服扇区的多个单元中的伺服模式，并且独立于位置误差信号（PES）来比较单元间单元读回信号。盘的伺服扇区包含多个伺服识别单元，从而为每个单元产生伺服回读信号。如果来自单个扇区或连续扇区的相同单元的两个连续单元的伺服信号数据相差大于预定误差阈值，则指示物理振荡或震动，并且伺服控制系统引起写入禁止写入通道的命令。

29. 发明授权

US06111720A Method and apparatus for providing separate read/write velocity curves 失效
标题翻译：提供单独读/写速度曲线的方法和装置
公开(公告)号：US06111720A
公开(公告)日：2000-08-29
申请号：US919843
申请日：1997-08-28
申请人： Donald Lee Clare , Bernd Lamberts , Louis Joseph Serrano
发明人： Donald Lee Clare , Bernd Lamberts , Louis Joseph Serrano
IPC分类号： G11B5/55 , G11B19/02 , G11B21/08 , G11B5/596
CPC分类号： G11B21/083 , G11B19/02 , G11B5/5534 , G11B5/5547
摘要： A computer disk drive unit having a control system that uses a separate velocity profile for read seeks and for write seeks is disclosed. Appropriate velocity profiles are provided according to whether a seek operation is a read seek operation or a write seek operation. The control system includes a memory for storing an initial velocity profile and a processor for determining whether a read seek operation or a write seek operation is to be performed. The processor obtains the initial velocity profile from memory to produce a read velocity profile or a write velocity profile. The processor multiplies the velocity profile obtain from the memory by a predetermined constant to derive the read velocity profile when the processor determines that a read operation is to be performed. Then the processor repositions the head according to the write velocity profile or the read velocity profile. The processor may also multiply the initial velocity profile by a write profile coefficient to obtain the write velocity profile. A monitor may be provided for monitoring disk drive performance parameters and providing the processor with data concerning the performance parameters, wherein the processor enforces utilization of the write profile when the data concerning the performance parameters meet a predetermined criteria. The predetermined criteria may include an excessive overshoot condition.
摘要翻译：公开了一种具有使用单独的速度分布进行读取和写寻找的控制系统的计算机磁盘驱动器单元。根据搜索操作是读取操作还是写入寻找操作，提供适当的速度曲线。控制系统包括用于存储初始速度分布的存储器和用于确定是否要执行读取寻找操作或写入寻找操作的处理器。处理器从存储器获得初始速度分布，以产生读取速度分布或写入速度分布。当处理器确定要执行读取操作时，处理器将从存储器获得的速度分布乘以预定常数以导出读取速度分布。然后处理器根据写入速度分布或读取速度分布来重新定位磁头。处理器还可以将初始速度分布乘以写轮廓系数以获得写入速度分布。可以提供监视器来监视磁盘驱动器性能参数并向处理器提供关于性能参数的数据，其中当涉及性能参数的数据满足预定标准时，处理器强制使用写入配置文件。预定标准可以包括过大的过冲条件。

30. 发明授权

US6049438A Method and apparatus for encoding digital servo information in a servo burst 失效
标题翻译：用于在伺服突发中对数字伺服信息进行编码的方法和装置
公开(公告)号：US6049438A
公开(公告)日：2000-04-11
申请号：US813775
申请日：1997-03-07
申请人： Louis Joseph Serrano , Mantle Man-Hon Yu
发明人： Louis Joseph Serrano , Mantle Man-Hon Yu
IPC分类号： G11B5/596 , G11B20/12 , G11B21/08 , G11B21/10 , G11B27/30 , G11B5/09
CPC分类号： G11B27/3027 , G11B21/085 , G11B21/10 , G11B5/59655 , G11B5/59688 , G11B20/1258
摘要： A method and apparatus for writing binary servo data into the servo bursts contained on the storage medium of a storage device. The binary servo information may include track identifying information such as a track number, cylinder number, head number, sector number, index and/or SID. A burst includes T time slots, each slot comprising one cycle of the servo burst frequency, and the servo data to be written comprises X bits of binary data. Each one-bit of the servo data is represented as a slot containing a transition, and each zero-bit is represented as an empty or null slot. In this manner, the present invention provides a highly bit-efficient scheme for representing digital servo data. A high quality PES signal is assured by writing the binary servo information in such a manner as to guarantee a threshold number of transitions per burst as required for accurate peak-hold detection. Data is encoded to provide a constant or substantially constant number of positive transitions per burst to allow accurate integration detection. If the amount of real estate consumed by the servo regions is less critical than the reliability of the binary data, robustness may be enhanced by using dibits rather than single transitions to represent the data.
摘要翻译：一种用于将二进制伺服数据写入包含在存储设备的存储介质上的伺服脉冲串中的方法和装置。二进制伺服信息可以包括诸如轨道号，气缸号，头数，扇区号，索引和/或SID之类的轨迹识别信息。脉冲串包括T个时隙，每个时隙包括伺服脉冲串频率的一个周期，并且要写入的伺服数据包括X位的二进制数据。伺服数据的每一位被表示为包含转移的时隙，并且每个零位表示为空或空时隙。以这种方式，本发明提供了用于表示数字伺服数据的高比特率方案。通过以确保准确的峰值保持检测所需的每个突发的阈值数目的方式写入二进制伺服信息来确保高质量的PES信号。数据被编码以提供恒定或基本恒定数量的每个突发的正转移以允许精确的积分检测。如果伺服区域消耗的房地产量不如二进制数据的可靠性那么关键，则可以通过使用二进制而不是单个转换来表示数据来增强鲁棒性。

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