公开(公告)号：WO1998010414A1

公开(公告)日：1998-03-12

申请号：PCT/US1997014570

申请日：1997-08-20

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  HO, Hai ,  DOAN, Toan

IPC: G11B05/596

CPC classification number: G11B21/085 ,  G11B5/59633 ,  G11B5/59655 ,  G11B19/28 ,  G11B21/10 ,  G11B21/106 ,  G11B23/36

Abstract: A servo sector allocation scheme for a disk based data storage system is disclosed that realizes an increased servo sampling rate without an associated increase in overhead. The scheme involves increasing the number of servo sectors on a subset (preferable one) of the disk surfaces in the disk drive while reducing the number of servo sectors on all remaining disk surfaces. A master servo feedback signal is then derived from the surface(s) with an increased number of servo sectors and provided to a master PES controller (44). A slave servo feedback signal is derived from the surface that is being accessed and is provided to a slave PES controller (46). The master PES control signal (Xm) is then combined with the slave PES control signal (Xs) to form a single position error signal (Xe) that is used to control the positioning of a transducer (58).

Abstract translation: 公开了一种用于基于盘的数据存储系统的伺服扇区分配方案，其实现了增加的伺服采样速率，而没有相应的开销增加。 该方案包括增加磁盘驱动器中磁盘表面的子集（优选一个）上的伺服扇区的数量，同时减少所有剩余磁盘表面上的伺服扇区的数量。 然后，从伺服扇区数量增加的表面导出主伺服反馈信号，并提供给主控制器（44）。 从伺服反馈信号从被访问的表面导出并提供给从属PES控制器（46）。 然后，将主PES控制信号（Xm）与从PES控制信号（Xs）组合以形成用于控制换能器（58）的定位的单个位置误差信号（Xe）。

公开(公告)号：WO1997002532A1

公开(公告)日：1997-01-23

申请号：PCT/US1996011090

申请日：1996-06-28

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BURTON, Scott ,  CARLSON, Lance, R. ,  CORNABY, Stephen, R.

IPC: G06F13/14

CPC classification number: G11B19/04 ,  G11B20/10 ,  G11B20/1258 ,  G11B20/18 ,  G11B2020/1282

Abstract: The present invention provides a method and apparatus for assuring that the desired data is transferred between a variable rate disk drive (31) and a host system during read and write operations. The invention involves retaining a variable amount of data in a buffer memory (38) after the data has been transferred between the buffer memory (38) and a magnetic disk (31) with the variable amount of data retained based upon a predetermined fixed period of time associated with error conditions and a disk transfer rate. If an error condition is detected during a transfer of data between the buffer memory (38) and the disk (31), all of the retained data may be retransferred after the error has been corrected.

Abstract translation: 本发明提供一种用于确保在读取和写入操作期间在可变速率盘驱动器（31）和主机系统之间传送期望数据的方法和装置。 本发明涉及在数据已经在缓冲存储器（38）和磁盘（31）之间传送之后将可变量的数据保存在缓冲存储器（38）中，其中可变量的数据基于预定的固定周期 与错误条件和磁盘传输速率相关联的时间。 如果在缓冲存储器（38）和盘（31）之间的数据传送期间检测到错误状况，则可以在修正错误之后重新传输所有保留的数据。

公开(公告)号：WO1996041339A1

公开(公告)日：1996-12-19

申请号：PCT/US1996009588

申请日：1996-06-07

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  MACPHERSON, Aaron, S. ,  HARWOOD, Gordon, A. ,  BOECKNER, James, W. ,  JARGON, Jonathan, D.

IPC: G11B05/54

CPC classification number: G11B5/54

Abstract: A mono stable active latch apparatus is disclosed for use in a hard disk drive (10) which has a housing (18), a rotating data storage disk and an actuator mounted in the housing. The actuator (12) controllably positions a read/write head over a predetermined portion of the disk and includes a voice coil motor coil (16) carried by a yoke portion of the actuator. The active latch uses a permanent magnet to bias an elongated rotatable latch arm (32) into engagement with the actuator when the actuator is positioned in the landing zone. An electromagnet coil, positioned between the magnet and the magnetic return plates, when energized, counters this bias, permitting the latch arm to rotate, counterclockwise, out of engagement with the actuator. When the coil is deenergized, the permanent magnet provides a clockwise torque on the arm, raising the latch end of the latch arm to a first position out of the path of the actuator. When the coil is energized, the latch end of the latch arm is driven to a second position beneath the rear end of the actuator. If the coil is deenergized while the actuator is positioned in the landing zone of the disk, the latch end of the latch arm catches and latches the actuator, preventing further rotation of the actuator until the coil is again energized and the actuator moved away from the landing zone.

Abstract translation: 公开了一种用于硬盘驱动器（10）的单稳态有源锁存装置，其具有壳体（18），旋转数据存储盘和安装在壳体中的致动器。 致动器（12）可控制地将读/写头定位在盘的预定部分上，并且包括由致动器的轭部支承的音圈电机线圈（16）。 当致动器定位在着陆区域中时，主动闩锁使用永磁体来将细长的可旋转锁定臂（32）偏置成与致动器接合。 位于磁体和磁性返回板之间的电磁线圈在被通电时对其施加偏压，从而允许锁定臂逆时针旋转而不与致动器接合。 当线圈断电时，永磁体在臂上提供顺时针转矩，将闩锁臂的闩锁端部升高到致动器路径外的第一位置。 当线圈通电时，闩锁臂的闩锁端被驱动到致动器后端下方的第二位置。 如果线圈在致动器位于盘的着陆区域时被断电，则闩锁臂的闩锁端卡住并闩锁致动器，防止致动器的进一步旋转，直到线圈再次通电，并且致动器远离 着陆区。

公开(公告)号：WO1996038839A1

公开(公告)日：1996-12-05

申请号：PCT/US1996007626

申请日：1996-05-23

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  MATHEWS, Harlan ,  MCNEIL, Michael ,  BLATCHLEY, Michael, A.

IPC: G11B05/02

CPC classification number: G11B5/012 ,  G11B5/09 ,  G11B9/00

Abstract: As depicted in the Figure, a resonant frequency control circuit (18) communicates with a head (14) of a disk drive and a read/write channel (22). The resonant frequency control circuit (18) is useful in achieving peaking of a readback signal generated by reading data from a magnetic disk (10). The read/write channel (22) includes an equalizer circuit for enhancing equalization of the readback signal. A controller (76) communicates with the read/write channel (22) and the resonant frequency control circuit (18) for, in one embodiment, selectively adding capacitance to that capacitance which is present in the read element (16) of the head (14). By controlling the resonant frequency, this desired signal peaking can be achieved, which is related to the frequencies of the coded data on the disk (10).

Abstract translation: 如图所示，谐振频率控制电路（18）与盘驱动器的头部（14）和读/写通道（22）通信。 谐振频率控制电路（18）可用于实现通过从磁盘（10）读取数据而产生的回读信号的峰化。 读/写通道（22）包括用于增强回读信号的均衡的均衡器电路。 在一个实施例中，控制器（76）与读/写通道（22）和谐振频率控制电路（18）进行通信，在一个实施例中，选择性地将电容添加到头部的读取元件（16）中存在的电容 14）。 通过控制谐振频率，可以实现与磁盘（10）上的编码数据的频率相关的期望的信号峰化。

公开(公告)号：WO1996010821A1

公开(公告)日：1996-04-11

申请号：PCT/US1995013052

申请日：1995-09-29

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  VALENT, James, A.

IPC: G11B05/82

CPC classification number: G11B21/083 ,  G11B5/035 ,  G11B5/4886 ,  G11B5/5534 ,  G11B5/59611 ,  G11B5/59644 ,  G11B5/5965 ,  G11B5/59655 ,  G11B5/59683

Abstract: A method and apparatus for creating a position error signal (PES) voltage v. track distance curve for the head (20) of a hard disk drive (10). The disk (12) has a dedicated track which contains a plurality of servo bits (34) that allow the head to be centered with the centerline of the track. The dedicated track also has a number of calibration bits (50-60) each embedded at a known location off-set from the track centerline. The PES voltage v. track distance curve is generated by reading each calibration bit and storing the corresponding amplitude of the position error signal in a memory device of the disk drive. Each calibration bit is located from the track centerline a distance that is different from the other calibration bits so that there are provided multiple points on the track curve.

Abstract translation: 一种用于创建硬盘驱动器（10）的头部（20）的位置误差信号（PES）电压v。跟踪距离曲线的方法和装置。 磁盘（12）具有专用磁道，该专用磁道包含允许磁头与磁道的中心线对中的多个伺服位（34）。 专用轨道还具有多个校准位（50-60），每个校准位嵌入在离轨道中心线偏离的已知位置。 通过读取每个校准位并将位置误差信号的相应幅度存储在磁盘驱动器的存储器件中来产生PES电压v。轨迹距离曲线。 每个校准位从轨道中心线的距离与其他校准位不同，以便在曲线曲线上提供多个点。

公开(公告)号：WO1996010249A1

公开(公告)日：1996-04-04

申请号：PCT/US1995012954

申请日：1995-09-27

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BRUNER, Curt ,  REH, Jeff ,  HUTSELL, Larry

IPC: G11B05/05

CPC classification number: G11B33/121 ,  G11B19/02 ,  G11B21/22

Abstract: A hard disk drive (10) that latches the heads (24) of the drive away from the data sectors of the disk (18) when the drive enters an idle power down mode. Power to the voice coil motor (40) is terminated when the disk drive (10) enters the idle power down mode. Before terminating power to the voice coil motor (40), the heads (24) are moved to an inner diameter location of the disk (18) which does not contain data, commonly referred to as a landing zone. The heads (24) are maintained on the landing zone by a latch that captures a portion of the actuator arm. The latch fully secures the actuator arm (28) so that a shock load will not move the heads (24) onto the data sectors of the disk (18) and damage the same. When the disk drive (10) exits the idle power down, the latch is disengaged from the actuator arm (28), the voice coil (36) is powered up, and the heads (24) are moved back over the data sectors for subsequent disk access.

Abstract translation: 当驱动器进入空闲掉电模式时，硬盘驱动器（10）将驱动器的磁头（24）锁定离开盘（18）的数据扇区。 当磁盘驱动器（10）进入空闲掉电模式时，对音圈电机（40）的电力终止。 在向音圈电机（40）通电之前，磁头（24）被移动到盘（18）的不包含通常称为着陆区的数据的内径位置。 头部（24）通过捕获致动器臂的一部分的闩锁保持在着陆区域上。 闩锁完全固定致动器臂（28），使得冲击负载不会将磁头（24）移动到磁盘（18）的数据扇区上并损坏磁盘（18）。 当磁盘驱动器（10）离开空闲电源时，闩锁与致动器臂（28）脱离，音圈（36）上电，并且磁头（24）在数据扇区之后移回以备后续 磁盘访问。

公开(公告)号：WO1996005593A1

公开(公告)日：1996-02-22

申请号：PCT/US1995010264

申请日：1995-08-10

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  RIGGLE, C., M.

IPC: G11B05/09

CPC classification number: H03M13/6331 ,  G11B5/09 ,  G11B20/10009 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6502

Abstract: A finite impulse response (FIR) filter (100) and a Viterbi detector system (110) for a magnetic read channel (101) are disclosed. The FIR equalizer generates equalized sampled outputs to the Viterbi detector system. The Viterbi detector system determines the most probable value of all references, Ri by accumulating a summation of data sample values, Dt, for selected legal bit sequences over a significant amount of random data. The summation and count of data samples are output to a system microprocessor for calculation of an average reference for each path of the Viterbi system. The Viterbi detector system also calculates, in real time, magnitude of differences between the output data received from the FIR equalizer and transition references for each data sample to generate transition metrics, adds transition metrics to state metrics from the source node of two paths, and compares the result. The lesser of the two yields the most likely correct state metric. Encoded bit strings of finite length are updated and saved for each state. Data is output from an arbitrary bit string.

Abstract translation: 公开了一种用于磁读取通道（101）的有限脉冲响应（FIR）滤波器（100）和维特比检测器系统（110）。 FIR均衡器产生均衡的采样输出到维特比检测器系统。 维特比检测器系统通过在大量的随机数据上累积所选择的合法比特序列的数据样本值Dt的求和来确定所有参考的最可能的值。 将数据样本的求和和计数输出到系统微处理器，以计算维特比系统的每个路径的平均参考值。 维特比检测器系统还实时地计算从FIR均衡器接收的输出数据与每个数据样本的转换参考之间的差异的大小，以产生转换度量，将转移度量添加到来自两个路径的源节点的状态度量，以及 比较结果。 两者中较小者产生最可能的正确状态度量。 对每个状态更新和保存有限长度的编码位串。 数据从任意位串输出。

公开(公告)号：WO1995021464A1

公开(公告)日：1995-08-10

申请号：PCT/US1995001493

申请日：1995-02-03

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  WILMER, Richard, K.

IPC: H01L41/08

CPC classification number: G01P15/0888

Abstract: A sensor (25) for sensing rotational displacements of a body (41) comprises an elongated beam (20) of a material providing a piezoelectric effect. The elongated beam (20) has a first and second ends and a central portion, with the ends of the beam being attached to an interior surface of a case (40). The case, in turn, is attached to the body (41). When the body (41) is subject to rotational accelerations, the beam (20) is stressed, and a piezoelectric voltage is generated across the length of the beam (20).

Abstract translation: 用于感测主体（41）的旋转位移的传感器（25）包括提供压电效应的材料的细长梁（20）。 细长梁（20）具有第一和第二端和中心部分，梁的端部附接到壳体（40）的内表面。 该壳体依次连接到主体（41）上。 当主体（41）受到旋转加速时，梁（20）受到应力，并且跨梁（20）的长度产生压电电压。

公开(公告)号：WO1995015554A1

公开(公告)日：1995-06-08

申请号：PCT/US1994013864

申请日：1994-12-02

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BEECROFT, Harold, J.

IPC: G11B05/48

CPC classification number: G11B5/48

Abstract: A flexbeam (30) for a hard disk drive (10) that complies with the PCMCIA specifications. The flexbeam has a magnetic head (22) mounted at a first end and a second end coupled to a voice coil motor assembly (28). Extending from each side of the flexbeam is a wall (44) which runs along a portion of the beam. The walls increase the stiffness of the flexbeam, so that the beam is not damaged when the disk drive is subjected to a shock load. The portion of the flexbeam that does not have the walls is flexible enough to allow the beam to deflect when an air bearing is formed between the magnetic head and a rotating disk. The flexbeam also has a C shaped slot that allows the head to pivot about the beam.

Abstract translation: 用于符合PCMCIA规范的硬盘驱动器（10）的弹性片（30）。 柔性梁具有安装在第一端的磁头（22）和耦合到音圈电动机组件（28）的第二端。 从挠曲束的每一侧延伸的是沿着梁的一部分延伸的壁（44）。 墙壁增加柔性梁的刚度，使得当磁盘驱动器受到冲击载荷时，梁不会损坏。 柔性梁的不具有壁的部分是足够柔韧的，以允许当在磁头和旋转盘之间形成空气轴承时梁被偏转。 柔性梁还具有允许头围绕梁枢转的C形槽。

公开(公告)号：WO1995014298A1

公开(公告)日：1995-05-26

申请号：PCT/US1994012349

申请日：1994-11-03

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  VOEGELI, Otto ,  TZANAVARAS, George

IPC: G11B05/39

CPC classification number: G11B5/398 ,  G11B5/399 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49044

Abstract: A selective pulse interdiffusion process for magnetoresistive transducers. A magnetoresistive transducer has an active sensor region comprised of two separate layers of different materials. Because the resistance of the active region varies in relation to an external magnetic field, data stored on a magnetic disk can be read. Two passive end regions abutting either side of and flush with the active region are implemented to bias the transducer. The two end regions are initially comprised of the same materials making up the active region. These materials are interdiffused, giving it permanent magnetic properties for biasing the transducer. The interdiffusion is accomplished by selectively passing short pulses of current through the end regions. The heating causes the end regions to interdiffuse. By thusly pulsing the current, lateral heating of the active region is minimized. The selective pulse interdiffusion process can be applied simultaneously to a number of magnetoresistive elements which are chained together in the fabrication process.

Abstract translation: 用于磁阻换能器的选择性脉冲相互扩散过程。 磁阻换能器具有由两个分开的不同材料层组成的有源传感器区域。 由于有源区的电阻相对于外部磁场而变化，因此可以读取存储在磁盘上的数据。 实现了与有源区域相邻并与其齐平的两个被动端区域以偏置换能器。 两个端部区域最初由构成活性区域的相同材料组成。 这些材料是相互扩散的，赋予它永久磁性以偏置传感器。 通过选择性地将短脉冲的电流通过端部区域来实现相互扩散。 加热导致端部区域相互扩散。 通过脉冲电流，有源区域的横向加热最小化。 选择性脉冲相互扩散处理可以同时应用于在制造过程中链接在一起的多个磁阻元件。