公开(公告)号：WO1998026411A1

公开(公告)日：1998-06-18

申请号：PCT/US1997019019

申请日：1997-10-10

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  CARLSON, Lance, R. ,  WHALEY, Jeffrey, L. ,  METZ, Robert, L.

IPC: G11B05/60

CPC classification number: G11B17/32 ,  G11B5/6029

Abstract: A system for determining whether the flying height of a read/write head above a disk (14) in a disk drive (10) is within an acceptable range, in substantially real time. The system relies on variations in read signal resolution with flying height to make the determination. In one embodiment, read signal resolution is measured and compared to a predetermined threshold value to determine whether the present flying height is in the desired range. In another embodiment, the number of peaks in a read signal that are detected (and/or not detected) by a detector is used to determine whether the head is in the proper flying height range. Because of read signal resolution effects, the number of detected peaks will decrease as the flying height of the head is decreased. The system also provides for postponing a transfer of data to/from the disk (14) when it is determined that the head is not within the acceptable range.

Abstract translation: 一种用于确定磁盘驱动器（10）中的盘（14）上方的读/写头的飞行高度是否在实质上实时地处于可接受范围内的系统。 系统依赖于读取信号分辨率与飞行高度的变化进行确定。 在一个实施例中，测量读取信号分辨率并将其与预定阈值进行比较，以确定当前飞行高度是否在期望的范围内。 在另一个实施例中，由检测器检测（和/或未检测）的读取信号中的峰值数量用于确定头部是否处于适当的飞行高度范围内。 由于读取信号分辨率的影响，当头部的飞行高度减小时，检测到的峰值数量将减少。 当确定头部不在可接受的范围内时，系统还提供将数据传送到/从盘（14）传送的数据。

公开(公告)号：WO1998016920A1

公开(公告)日：1998-04-23

申请号：PCT/US1997019012

申请日：1997-10-10

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  WHALEY, Jeffrey, L. ,  METZ, Robert, L.

IPC: G11B05/09

CPC classification number: G11B20/1252 ,  G11B5/5526 ,  G11B5/596 ,  G11B21/085 ,  G11B27/326

Abstract: Separate servo parameter values are combined into a single servo parameter value having a bit length shorter than the total bit length of the separate parameter values. The combined parameter value is then stored in a servo field (16) on a storage disk (10). By storing the shorter combined parameter, a given amount of servo information can be stored in a smaller space on the disk (10), thereby reducing overhead. In one embodiment, servo parameters are added together to create the combined parameters. In another embodiment, an equation is provided for creating the combined parameters, that results in a relatively large numerical distance between combined parameters in adjacent servo sectors on a track of the storage disk (10). The combined parameters stored on the disk (10) can be used, for example, to check the accuracy of software position estimators in the disk drive.

Abstract translation: 分离的伺服参数值被组合成具有比单独的参数值的总位长度短的位长度的单个伺服参数值。 然后将组合的参数值存储在存储盘（10）上的伺服字段（16）中。 通过存储较短的组合参数，可以将一定量的伺服信息存储在盘（10）上较小的空间中，从而减少开销。 在一个实施例中，将伺服参数相加在一起以产生组合的参数。 在另一个实施例中，提供了用于创建组合参数的等式，其导致存储盘（10）的轨道上的相邻伺服扇区中的组合参数之间的相对较大的数值距离。 例如，可以使用存储在盘（10）上的组合参数来检查磁盘驱动器中的软件位置估计器的精度。

公开(公告)号：WO1996039692A1

公开(公告)日：1996-12-12

申请号：PCT/US1996008773

申请日：1996-06-05

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  MATHEWS, Harlan ,  VALENT, James, A.

IPC: G11B05/596

CPC classification number: G11B5/59627 ,  G11B5/3967 ,  G11B5/4886 ,  G11B5/5526 ,  G11B5/5534 ,  G11B5/5547 ,  G11B5/5965

Abstract: The present invention discloses a head positioning system (26) for accurately positioning a read/write head (24) along a selected track (22) of a rotating magnetic disk (20). In one aspect, servo information (64, 68) is embedded along the track (22) with the centerline (72) of the servo information (64, 68) offset a radial distance (88) from the centerline (56) of data stored or written along the track. The head positioning system (26) micro-jogs the read/write head (24) a first (84) and a second (88) radial distance from the centerline of servo information for a read operation (80) and a write operation (76).

Abstract translation: 本发明公开了一种用于沿着旋转磁盘（20）的选定轨道（22）精确定位读/写磁头（24）的磁头定位系统（26）。 在一个方面，伺服信息（64,68）沿着轨道（22）嵌入，伺服信息（64,68）的中心线（72）偏离与存储的数据的中心线（56）的径向距离（88） 或沿轨道写。 磁头定位系统（26）对于读取操作（80）和写入操作（76）从伺服信息的中心线向第一（84）和第二（88）径向距离微读取/写入头部（24） ）。

公开(公告)号：WO1996034390A1

公开(公告)日：1996-10-31

申请号：PCT/US1996005779

申请日：1996-04-26

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  KNIGHTON, David, B. ,  BEECROFT, Harold

IPC: G11B33/08

CPC classification number: G11B33/121 ,  G11B33/08

Abstract: There is a cover plate (30) and a base plate (28) forming a hard disk drive (10). Together the plates define a housing which encloses the disk and accompanying hardware of the disk drive. A clamp (32) has a C-shaped cross section which includes a pair of leg portions (34) adjacent to an outer flange portion of the housing. When the clamp is in an unassembled condition, the distance between the leg portions is less than the combined thickness of the outer flange portion. The leg portions have a plurality of tabs (40) which extend into corresponding slots in the plates to lock the clamp onto the housing. Mounted to the outer edges of the cover and the base plate are a pair of elastomeric strips (60, 64) which absorb shock loads applied to the edges of the disk drive. The strips each have a plurality of studs (70) that are inserted into corresponding notches (72) in the plates.

Abstract translation: 存在形成硬盘驱动器（10）的盖板（30）和基板（28）。 板一起限定了一个外壳，其中包含磁盘和磁盘驱动器的相应硬件。 夹具（32）具有C形横截面，其包括与壳体的外凸缘部分相邻的一对腿部（34）。 当夹具处于未组装状态时，腿部之间的距离小于外凸缘部分的组合厚度。 腿部具有多个突片（40），其延伸到板中的相应槽中以将夹具锁定到壳体上。 安装到盖的外边缘和基板是一对弹性体条（60,64），其吸收施加到盘驱动器的边缘的冲击载荷。 条带各自具有插入板中相应的凹口（72）中的多个螺柱（70）。

公开(公告)号：WO1994029862A1

公开(公告)日：1994-12-22

申请号：PCT/US1994004537

申请日：1994-04-25

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BEECROFT, Harold, J.

IPC: G11B21/08

CPC classification number: G11B5/4813 ,  F16C32/02 ,  F16C2370/12 ,  G11B5/5521 ,  G11B21/02 ,  G11B25/043

Abstract: A bearing assembly for an actuator arm (22) of a hard disk drive unit. The assembly includes a cylindrical bearing block (26) which extends from a baseplate. The bearing block has a V-shaped slot with a first apex at the center of the block. The actuator arm has a triangular shaped pivot bearing (30) which extends into the V-shaped slot of the bearing block. The pivot bearing has a second apex which is in contact with the first apex of the slot and allows the actuator arm to rotate relative to the block. The pivot bearing is pushed into contact with the block by a clip (34). The clip has a first arm which is in contact with the bearing block and a second arm which is in contact with an arcuate surface of the actuator arm.

Abstract translation: 一种用于硬盘驱动单元的致动器臂（22）的轴承组件。 组件包括从基板延伸的圆柱形轴承座（26）。 轴承座具有在块的中心具有第一顶点的V形槽。 致动器臂具有延伸到轴承座的V形槽中的三角形的枢转轴承（30）。 枢转轴承具有与槽的第一顶点接触的第二顶点，并允许致动器臂相对于块旋转。 枢转轴承通过夹子（34）被推入与块接触。 夹子具有与轴承座接触的第一臂和与致动器臂的弓形表面接触的第二臂。

公开(公告)号：WO1994011870A1

公开(公告)日：1994-05-26

申请号：PCT/US1993009857

申请日：1993-10-14

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  DION, F., Eugene

IPC: G11B17/02

CPC classification number: G11B33/1446 ,  G11B33/1453 ,  G11B33/1486

Abstract: A filter system (10) for a hard disk drive which has a venturi (24) that is actuated by rotation of the magnetic disk (46) and which pumps internal air through a recirculation filter (34) located within the disk drive. The drive unit also has a diffusion tube (16), dessicant (20), and breather filter (22) coupled to the ambient by a breather port (14) in the housing of the disk drive.

Abstract translation: 一种用于硬盘驱动器的过滤器系统（10），其具有通过所述磁盘（46）的旋转来驱动的文丘里管（24），并且通过位于所述盘驱动器内的再循环过滤器（34）来泵送内部空气。 驱动单元还具有通过盘驱动器的壳体中的通气端口（14）连接到环境的扩散管（16），干燥剂（20）和通气过滤器（22）。

公开(公告)号：WO1994009434A1

公开(公告)日：1994-04-28

申请号：PCT/US1993009824

申请日：1993-10-12

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BRUNELLE, Philip, E.

IPC: G06F13/00

CPC classification number: G06F3/0601 ,  G06F12/0866 ,  G06F2003/0691 ,  G06F2212/312

Abstract: A method and apparatus is disclosed for partitioning a data buffer to create separate read and write buffers, wherein the boundaries between the buffers and the sizes of the buffers change dynamically depending upon the command mix received from the host computer. Data buffer space is allocated to provide highest priority to processing the current host command (100), and next priority to preserving a read ahead cache (170).

Abstract translation: 公开了一种用于划分数据缓冲器以创建单独的读和写缓冲器的方法和装置，其中缓冲器之间的边界和缓冲器的大小根据从主计算机接收的命令混合而动态地改变。 分配数据缓冲区空间以提供处理当前主机命令（100）的最高优先级，以及保留预读高速缓存（170）的下一优先级。

公开(公告)号：WO1993000622A1

公开(公告)日：1993-01-07

申请号：PCT/US1992005413

申请日：1992-06-26

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  BAUCK, Randall, C. ,  CHASE, Scott, E. ,  HARGARTEN, James, W. ,  PEDERSON, Richard, J.

IPC: G05B21/02

CPC classification number: G05B21/02

Abstract: An automatic control system (10) employing a sample and "early-off" hold function (25) is described. The invention involves implementing the hold function (23) in such a way as to reduce the amount of delay or phase lag introduced into the system (10). The reduction in phase loss permits a greater operating bandwidth, thereby enhancing performance without a corresponding increase in cost or complexity. Instead of holding a constant value for the duration of a sample period (T), the present invention holds the constant value for some fraction of the sample period (T) and then changes the output value of the hold device for the remainder of the sample period (T).

Abstract translation: 描述采用采样和“提前关闭”保持功能的自动控制系统（10）（25）。 本发明涉及实现保持功能（23），以减少引入系统（10）的延迟或相位滞后量。 相位损耗的减少允许更大的工作带宽，从而提高性能而不会相应增加成本或复杂性。 代替在采样周期（T）的持续时间内保持恒定值，本发明保持采样周期（T）的一些分数的常数值，然后改变对于样本的其余部分的保持装置的输出值 期（T）。

公开(公告)号：WO1990009021A1

公开(公告)日：1990-08-09

申请号：PCT/US1990000529

申请日：1990-01-23

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  HUBER, William, D.

IPC: G11B05/09

CPC classification number: G11B20/10046 ,  G11B20/10009

Abstract: A read channel detector circuit for recovery of digital data from a readback waveform produced by a magnetic recording head is disclosed. The detector circuit includes a forward filter (20) for slimming the rising edge and slurring the falling edge of an isolated input magnetic pulse. Quantized feedback techniques (23) are then used to produce a compensating waveform (O) which is substantially complementary to the slurred falling edge of the isolated magnetic pulse (8). The complementary waveform is added (21) to the forward filter output to produce a waveform (E) which is substantially a step function. This step function corresponds to a single digital transition, either positive-going or negative-going in a digital output sequence. The equalized waveform is then limited by a comparator (22) to produce the desired digital output sequence. By slimming only the rising edge of the input magnetic pulse and by using quantized feedback techniques, the overall bandwidth of the system is conserved resulting in an increased binary signalling capability without substantial intersymbol interference.

公开(公告)号：WO1990006574A1

公开(公告)日：1990-06-14

申请号：PCT/US1989005474

申请日：1989-12-04

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  WILMER, Richard, C. ,  DIBENE, Joseph, T.

IPC: G11B05/60

CPC classification number: G11B5/6005 ,  G11B5/11 ,  G11B5/127 ,  G11B5/1272 ,  G11B5/17 ,  G11B5/187

Abstract: A magnetic recording head for longitudinal rigid-disk recording is described. The recording head is characterized by an I-bar shaped magnetic core (32) which is attached flushly along the side (39) of a slider body (31). The core has a pole body section around which a wire coil (56) is wrapped for inducing magnetic flux changes in the media during write operations and for sensing magnetic flux which emanates from the disk surface during readback operations.