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1.发明授权Linearity compensation for a position error signal based on repeatable and non-repeatable run out in a disk drive 有权基于磁盘驱动器中可重复且不可重复的位置误差信号的线性补偿公开(公告)号：US06421198B1
公开(公告)日：2002-07-16
申请号：US09300026
申请日：1999-04-27
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： Linearity compensation is provided for a position error signal based on repeatable and non-repeatable run out in a data storage device. The run out is measured on a track of the data storage device at a plurality of points, such as a track center and one or more points offset from the track center. The run out is typically measured using either an unstitched primary position error signal or an unstitched quadrature position error signal. The offsets are usually stitch points for the position error signal. A component of the run out is extracted at the points, wherein the component generally comprises one or more characteristics of the run out, such as a frequency, a set of frequencies, a root mean square, or some other characteristic of the run out. The linearizing equation to be used for the position error signal is identified based on the measured run out and generally comprises a polynomial function. The coefficients of the linearizing equation are adjusted so that the run out and the component of the run out are substantially similar at the points. These steps are repeated until a satisfactory fit is achieved in the linearizing equation. Once a satisfactory fit is achieved, the coefficients for the linearizing equation are stored in the data storage device, so that they can be accessed by a servo controller during operation of the data storage device. The servo controller uses the linearizing equation to generate a linearized position error signal that is used to improve a track following capability of the data storage device.
摘要翻译： 基于在数据存储装置中可重复且不可重复的耗尽的位置误差信号提供线性补偿。 在轨道中心和偏离轨道中心的一个或多个点的多个点处在数据存储设备的轨道上测量跑出。 通常使用未缝合的初始位置误差信号或非缝合正交位置误差信号来测量跑出。 偏移量通常是位置误差信号的针迹点。 在点处提取跑步的分量，其中分量通常包括跑出的一个或多个特性，例如频率，一组频率，均方根或者跑出的其他一些特征。 用于位置误差信号的线性化方程式是基于测量的输出而被识别的，并且通常包括多项式函数。 调整线性化方程式的系数，使得耗尽量和耗尽量的分量在这些点上基本相似。 重复这些步骤，直到线性化方程式达到令人满意的拟合。 一旦实现令人满意的拟合，线性化方程的系数被存储在数据存储装置中，使得它们可以在数据存储装置的操作期间由伺服控制器访问。 伺服控制器使用线性化方程来产生线性化位置误差信号，该信号用于提高数据存储设备的跟踪能力。
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2.发明授权Method and system for adaptive settle and write inhibit constraints based on head geometry and servo/mechanical system 有权基于头几何和伺服/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
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。
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3.发明授权Settle time estimator feedback for rotational position reordering in data storage devices 失效数据存储设备中旋转位置重新排序的定时估计器反馈公开(公告)号：US06426843B1
公开(公告)日：2002-07-30
申请号：US09300070
申请日：1999-04-27
IPC分类号： G11B2102
CPC分类号： G11B21/02 , G11B5/5521
摘要： A method, apparatus, and article of manufacture for rotational position reordering of queued commands in a data storage device based on settle time estimator feedback. An initial settle time estimation is programmed into a servo controller for the data storage device. As data operations are performed in the data storage device, an actual settle time is measured for the data operations, generally through the use of a timer in the servo controller. The settle time estimation is then modified based on the actual settle time and the data operations are reordered or scheduled based on the settle time estimation. Specifically, the settle time estimation is adjusted based on a success rate for the data operations, wherein the success rate comprises a comparison of the actual settle time versus the settle time estimation. A first delta value is subtracted from the settle time estimation when the settle time estimation is greater than the actual settle time, and a second delta value is added to the settle time estimation when the settle time estimation is less than the actual settle time. Different settle time estimations may be used depending on various characteristics, i.e., settle time estimations differ for different transducers in the data storage device, according to a type of seek operation, according to a seek direction, according to a track location, and according to seek length.
摘要翻译： 基于结算时间估计器反馈的数据存储装置中的排队命令的旋转位置重新排序的方法，装置和制品。 初始定时估计被编程到用于数据存储设备的伺服控制器中。 由于在数据存储装置中执行数据操作，因此通常通过在伺服控制器中使用定时器来测量数据操作的实际结算时间。 然后，基于实际的结算时间来修改定时时间估计，并且基于确定时间估计重新排序或调度数据操作。 具体地，基于数据操作的成功率来调整结算时间估计，其中成功率包括实际结算时间与结算时间估计的比较。 当结算时间估计大于实际结算时间时，从结算时间估计中减去第一Δ值，并且当结算时间估计小于实际结算时间时，将第二增量值加到结算时间估计中。 可以根据各种特征使用不同的结算时间估计，即，根据搜索方式，根据搜索方向，根据轨道位置，并且根据搜索方式，根据搜索操作的类型，数据存储设备中的不同换能器的安息时间估计不同 寻求长度。
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公开(公告)号：US06362766B1
公开(公告)日：2002-03-26
申请号：US09501357
申请日：2000-02-09
IPC分类号： H03M182
CPC分类号： H03M1/822
摘要： A variable pulse pulse width modulation digital-to-analog converter comprising: an input code register to store a digital input code to be converted; a PWM decoder, coupled to the input code register, to convert the input code to a series of pulses; an output driver circuit coupled to the PWM decoder, wherein the output driver circuit generates an output signal comprising pulses of a high logic level and pulses of an intermediate logic level; and a filter to integrate the pulses to generate an analog output value corresponding to the digital input code. In one embodiment, the output stage comprises an active tri-state driver, a multiplexer and at least two output reference voltage sources. Using a plurality of different amplitude pulse levels enables PWM DACs according to the present invention to provide greater resolution than conventional PWM DACs for a given clock frequency and conversion period.
摘要翻译： 一种可变脉冲脉宽调制数模转换器，包括：输入代码寄存器，用于存储要转换的数字输入代码; 耦合到输入代码寄存器的PWM解码器，将输入代码转换为一系列脉冲; 耦合到所述PWM解码器的输出驱动器电路，其中所述输出驱动器电路产生包括高逻辑电平的脉冲和中间逻辑电平的脉冲的输出信号; 以及滤波器，用于对脉冲进行积分以产生对应于数字输入码的模拟输出值。 在一个实施例中，输出级包括有源三态驱动器，多路复用器和至少两个输出参考电压源。 使用多个不同的幅度脉冲电平使得根据本发明的PWM DAC能够为给定的时钟频率和转换周期提供比常规PWM DAC更大的分辨率。
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5.发明授权Data storage disk with information encoded in the position error signal fields 失效数据存储盘，其信息编码在位置误差信号字段中
公开(公告)号：US6141176A
公开(公告)日：2000-10-31
申请号：US98169
申请日：1998-06-16
CPC分类号： G11B5/012 , G11B20/18 , G11B27/3027 , G11B2220/20 , G11B5/596 , G11B5/59633 , G11B5/59655
摘要： There is disclosed a disk for use in a disk drive and a method for making the disk. The position error signal (PES) fields for each track on the disk are written with predetermined data, e.g. servo data, encoded thereon. In the preferred embodiment: a) the data such as the track number is mapped into codewords of an error correction code (ECC); b) bit-vectors are used to encode the symbols for further redundancy; and c) the raw data written in the PES fields is constrained to equalize the analog signal characteristic used by the servo system for positioning. Thus, the invention allows the PES fields to be used as in the prior art while also being used as a source of digital data which is robustly recorded therein. In one aspect of the invention, the track ID's are written in the PES fields in a selected pattern in which the track ID for each track is recorded in two PES field groups. One of the two PES field groups is centered on the selected track while the other PES field group is offset so that it partially overlaps the adjacent track, as well as the selected track. The PES fields will typically be recorded on the disk at the time of manufacture and not changed thereafter.
摘要翻译： 公开了用于磁盘驱动器的磁盘和用于制造磁盘的方法。 磁盘上每个磁道的位置误差信号（PES）字段被写入预定的数据，例如， 伺服数据，在其上编码。 在优选实施例中：a）诸如轨道号的数据被映射到纠错码（ECC）的码字中; b）位向量用于对符号进行编码以进一步冗余; 并且c）写入PES领域的原始数据被约束以使由伺服系统用于定位的模拟信号特性相等。 因此，本发明允许像现有技术那样使用PES领域，同时也被用作在其中牢固地记录的数字数据源。 在本发明的一个方面中，轨道ID以所选择的模式写入PES场中，其中每个轨道的轨迹ID被记录在两个PES场组中。 两个PES场组中的一个以所选择的轨道为中心，而另一个PES场组被偏移，使得其部分地与相邻轨道以及所选轨迹重叠。 PES场通常在制造时记录在磁盘上，之后不改变。
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6.发明授权Multiple and reconfigurable data access and storage device using multiple actuators 失效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
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。
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7.发明授权公开(公告)号：US06462898B2
公开(公告)日：2002-10-08
申请号：US09097994
申请日：1998-06-16
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。
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公开(公告)号：US06226140B1
公开(公告)日：2001-05-01
申请号：US09115490
申请日：1998-07-14
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。
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9.发明授权Method and apparatus for encoding digital servo information in a servo burst 失效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
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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10.发明授权公开(公告)号：US06577463B1
公开(公告)日：2003-06-10
申请号：US09561253
申请日：2000-04-27
IPC分类号： G11B509
CPC分类号： G11B5/59655
摘要： A system and method for precompensating for tangential misalignment in a direct access storage device adjusts a SID timing window individually for every track or surface of the direct access storage device. The system and method generate a calculation of the tangential misalignment and adjust, in accordance with the calculation of tangential misalignment, a timing window during which the transducer head reads the information located on the storage surface. The calculation of tangential misalignment may be the result of a direct measurement of the tangential misalignment, or may be converted from radial misalignment data. The adjustment of the timing window may comprise opening the timing window an amount depending upon the degree of misalignment of each track, and may comprise shifting the window in time either forward or backward depending upon the nature of the calculated misalignment.
摘要翻译： 在直接存取存储设备中用于预补偿切向不对准的系统和方法针对直接存取存储设备的每个轨迹或表面单独地调整SID定时窗口。 该系统和方法产生切向未对准的计算，并且根据切线未对准的计算调整换能器头读取位于存储表面上的信息的定时窗口。 切向不对准的计算可能是直接测量切线未对准的结果，或者可以从径向未对准数据转换。 定时窗口的调节可以包括根据每个轨道的未对准程度来打开定时窗口，并且可以包括根据所计算的未对准的性质向前或向后移动窗口。
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