公开(公告)号：US4480217A

公开(公告)日：1984-10-30

申请号：US449735

申请日：1982-12-14

申请人： David C. Robbins ,  David Haldeman ,  John P. Hill ,  Charles Sander ,  James Touchton

发明人： David C. Robbins ,  David Haldeman ,  John P. Hill ,  Charles Sander ,  James Touchton

IPC分类号： G05D3/12 ,  G11B5/55 ,  G11B21/08 ,  G05B5/01

CPC分类号： G11B5/5521

摘要： An automatic velocity calibrator for a head positioning servo system in a magnetic disk drive performs a velocity calibration in a single pass over the magnetic disks by measuring actuator velocity and adjusting the gain of the velocity transducer in a series of successive approximations. Velocity is determined by turning a timer on in response to a track crossing and turning the timer off after at least two successive track crossings have been detected. A plurality of velocity measurements are stored and averaged. The average velocity is compared to a constant velocity command and an 8-bit latch is incremented or decremented in response to this comparison. A digital to analog converter produces a reference for an automatic gain control amplifier in the servo system which in turn adjusts the velocity transducer gain.

摘要翻译： 用于磁盘驱动器中的磁头定位伺服系统的自动速度校准器通过测量致动器速度并以一系列逐次逼近来调节速度传感器的增益，在单次通过磁盘上执行速度校准。 通过响应于轨道交叉打开定时器并且在已经检测到至少两个连续的轨道交叉之后关闭定时器来确定速度。 存储并平均多个速度测量值。 将平均速度与恒定速度命令进行比较，并且响应于该比较，8位锁存器递增或递减。 数模转换器为伺服系统中的自动增益控制放大器提供参考，该放大器又调整速度传感器增益。

公开(公告)号：US20070074083A1

公开(公告)日：2007-03-29

申请号：US11230718

申请日：2005-09-20

申请人： Edwin Olds ,  Jonathan Haines ,  Dan Coonen ,  Timothy Feldman ,  Bruce Emo ,  James Touchton

发明人： Edwin Olds ,  Jonathan Haines ,  Dan Coonen ,  Timothy Feldman ,  Bruce Emo ,  James Touchton

IPC分类号： G06F11/00

CPC分类号： G06F11/004 ,  G06F11/008 ,  G11B20/1883 ,  G11B2220/20

摘要： A predictive failure control circuit and associated method are provided in a data storing and retrieving apparatus. The circuit is configured to schedule a data integrity operation on data associated with a subportion of a data storage space, in relation to a comparison of an accumulated plurality of executed host access commands associated with the subportion. The subportion can comprise a sector or a single track or a band of tracks. A table preferably stores accumulated number of host access commands for each of a plurality of subportions of the data storage space. The data integrity operation can comprise reading the data on to detect degradation and restoring the recovered data to the same or to new, different tracks. The data subportions can also be reallocated to a new location.

摘要翻译： 在数据存储和检索装置中提供预测故障控制电路和相关联的方法。 该电路被配置为针对与该子部分相关联的累积的多个执行的主机访问命令的比较来调度与数据存储空间的子部分相关联的数据的数据完整性操作。 该子部分可以包括扇区或单个轨道或轨道带。 表优选存储数据存储空间的多个子部分中的每一个的主机访问命令的累积数量。 数据完整性操作可以包括读取数据以检测劣化并将恢复的数据恢复到相同或新的不同的轨道。 数据子部分也可以重新分配到一个新的位置。

公开(公告)号：US5600506A

公开(公告)日：1997-02-04

申请号：US435435

申请日：1995-05-10

申请人： Michael Baum ,  James Touchton

发明人： Michael Baum ,  James Touchton

IPC分类号： G11B21/08 ,  G11B5/596

CPC分类号： G11B21/081

摘要： A method and system for generating a position signal indicative of the position of a transducer with reference to a fixed reference point on the surface of a disk within a disk drive system. The system is comprised of two major elements. The first element is a disk divided into sectors and has Z data tracks where each sector includes a preamble area that includes a servo band comprised of 0.75*Z consecutive overlapping quadrature servo patterns and gray scale band comprised of 1.5*Z consecutively addressed gray scale areas that have been recorded across all data tracks. The second element is a position generator that generates the position signal from the relative magnitude of each of the four servo bursts of a quadrature servo pattern of the servo band and the gray scale address of the gray scale area of the gray scale band that is read by a transducer when the transducer reads the preamble of a sector.

摘要翻译： 一种方法和系统，用于根据磁盘驱动器系统中的盘表面上的固定参考点产生指示换能器位置的位置信号。 该系统由两个主要元素组成。 第一要素是划分成扇区的磁盘，并且具有Z数据磁道，其中每个扇区包括前导区域，前导区域包括由0.75×Z个连续重叠正交伺服模式组成的伺服频带，以及由1.5×Z连续寻址的灰度区域 已被记录在所有数据轨道上。 第二个元件是一个位置发生器，它从伺服带的正交伺服模式的四个伺服脉冲串的每一个的相对幅度和读取的灰度带的灰度区域的灰度级地址产生位置信号 当换能器读取扇区的前导码时，通过换能器。