公开(公告)号：US06307705B1

公开(公告)日：2001-10-23

申请号：US08084337

申请日：1993-06-28

申请人： Clark Alan Anderson ,  Todd Barry Anderson ,  Gerald Lawrence Cadloni ,  Earl Albert Cunningham ,  Michael Scott Hicken ,  Daniel Donald Reno ,  John Jeffrey Stephenson

发明人： Clark Alan Anderson ,  Todd Barry Anderson ,  Gerald Lawrence Cadloni ,  Earl Albert Cunningham ,  Michael Scott Hicken ,  Daniel Donald Reno ,  John Jeffrey Stephenson

IPC分类号： G11B555

CPC分类号： G11B19/20 ,  G11B5/5547 ,  G11B5/59616

摘要： In a ultra high density, multiple-disk drive, track switches within a cylinder of tracks as well as track switches to tracks on other cylinders both require a movement of the head stack actuator. Track switching latency in such a disk drive is reduced by overlapping pre-movement portions of the track switching process with the data transfer operation of the currently active recording head. In addition, post-movement portions of the track switching process are overlapped with the movement of the heads so that the next selected read/write head may begin a data transfer operation immediately upon arrival at the next track. Further, the pre-movement and post-movement portions of the track-switch process may be overlapped with low displacement movement of the read/write heads relative to the currently active track or the next track.

摘要翻译： 在超高密度的多磁盘驱动器中，轨道气缸内的轨道开关以及轨道开关到其他气缸上的轨道都需要磁头堆栈致动器的移动。 通过与当前活动的记录头的数据传送操作重叠轨道切换过程的预移动部分来减少这种磁盘驱动器中的跟踪切换等待时间。 此外，轨道切换处理的后移动部分与磁头的移动重叠，使得下一个所选择的读/写头可以在到达下一个轨道时立即开始数据传送操作。 此外，轨道切换过程的预运动和后运动部分可以与读/写头相对于当前活动的轨道或下一个轨道的低位移移动重叠。

公开(公告)号：US5682274A

公开(公告)日：1997-10-28

申请号：US392276

申请日：1995-02-22

申请人： Dana Henry Brown ,  Earl Albert Cunningham ,  Kevin Jack Erickson ,  Richard Hunt Estry ,  Thomas William Glaser ,  Mark David Hagen ,  Hal Hjalmar Ottesen ,  Dean Curtis Palmer ,  John Jeffrey Stephenson

发明人： Dana Henry Brown ,  Earl Albert Cunningham ,  Kevin Jack Erickson ,  Richard Hunt Estry ,  Thomas William Glaser ,  Mark David Hagen ,  Hal Hjalmar Ottesen ,  Dean Curtis Palmer ,  John Jeffrey Stephenson

IPC分类号： G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B7/08 ,  G11B21/02 ,  G11B21/08

CPC分类号： G11B21/083 ,  G11B21/08 ,  G11B5/4886 ,  G11B5/5534 ,  G11B5/59644 ,  G11B7/08

摘要： An apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element and write element. The offset is determined at a first position and at a second position of the actuator arm assembly. From these offsets a constant and a multiplier are determined for determining an offset as a function of the cylinder location. Also disclosed is a method and apparatus for minimizing distance traveled to prevent misregistration when repositioning between the read element and a write element. The read element is intentionally offset from the write element at an angle so as to minimize the distance traveled across the disk.

摘要翻译： 一种用于在滑块或头部组件包含单独的读取元件和写入元件时纠正轨道重合失调的装置和方法。 在致动器臂组件的第一位置和第二位置处确定偏移。 根据这些偏移，确定常数和乘数以确定作为气缸位置的函数的偏移。 还公开了一种用于最小化行进距离以防止在读取元件和写入元件之间重新定位时的重合失调的方法和装置。 读取元件有意地以一定角度从写入元件偏移，以便最小化跨越盘的距离。

公开(公告)号：US5754357A

公开(公告)日：1998-05-19

申请号：US463604

申请日：1995-06-05

申请人： Todd Barry Anderson ,  Jeffrey Fred Boigenzahn ,  John Jeffrey Stephenson ,  Amy Lisette Warner

发明人： Todd Barry Anderson ,  Jeffrey Fred Boigenzahn ,  John Jeffrey Stephenson ,  Amy Lisette Warner

IPC分类号： G11B21/12 ,  G11B5/54 ,  G11B21/22 ,  G11B21/02

CPC分类号： G11B5/54

摘要： A method and an apparatus for optimizing movement of a disk drive's head actuator arm away from a magnetic latch that holds the arm in a parked position at the Inner Diameter (ID) of a disk. Current energizing of the arm's actuator motor moves the arm away from the magnetic latch and is controlled to compensate for any change in magnetic holding force. When the disk drive is powered up, a current pulse of one polarity is applied to the actuator motor. This initial current pulse normally moves the arm away from the magnetic latch and is followed by a current pulse of the opposite polarity to decelerate movement of the arm. If this initial sequence fails to move the arm away from the magnetic latch, the magnitude of the two current pulses is increased, and the opposite polarity pulse is followed by a small magnitude current of the one polarity. The read signal from the head is monitored to indicate that the arm has moved into the disk's central databand area, and then into the disk's Outer Diameter (OD) area. At this point, the magnitude of current of the one polarity is increased in small steps to gently bring the arm into contact with the disk drive's OD crash stop. The current of the one polarity is then decreased in small steps, and the arm gently moves away from the OD crash stop. The head signal is monitored until the head is positioned at a selected track.

公开(公告)号：US5999351A

公开(公告)日：1999-12-07

申请号：US709204

申请日：1996-08-27

申请人： David William Albrecht ,  Wayne Leung Cheung ,  Kok-Kia Chew ,  Ju-Hi Hong ,  John Jeffrey Stephenson

发明人： David William Albrecht ,  Wayne Leung Cheung ,  Kok-Kia Chew ,  Ju-Hi Hong ,  John Jeffrey Stephenson

IPC分类号： G11B5/012 ,  G11B5/48 ,  G11B5/596 ,  G11B21/08 ,  G11B5/09

CPC分类号： G11B21/083 ,  G11B5/012 ,  G11B5/4886 ,  G11B5/59605

摘要： A multi-track density direct access storage device is disclosed. In accordance with a preferred embodiment of the present invention, a direct access storage device for data storage within a data processing system comprises a housing, a rotatable spindle, at least one disk, and several heads. The disk is fixedly mounted to the rotatable spindle, and the rotatable spindle is rotated by a motor within the housing. A first disk surface of the disk has a first track density and a second disk surface of the disk has a second track density; wherein the second track density is preferably greater than the first track density. Each of the several heads contains a transducer to read and write information from and to the disk during the disk rotation. Under this configuration, the lower storage density first disk surface is utilized to store data that are frequently accessed while the higher storage density second disk surface is for storage capacity supplementation such that the total data storage capacity of the direct access storage device can be increased without degrading the data-accessing performance.

摘要翻译： 公开了一种多轨密度直接存取存储装置。 根据本发明的优选实施例，用于数据处理系统内的数据存储的直接存取存储装置包括壳体，可旋转主轴，至少一个盘和多个头部。 盘被固定地安装到可旋转的主轴上，并且可旋转的主轴由壳体内的电动机旋转。 盘的第一盘表面具有第一轨道密度，盘的第二盘表面具有第二轨迹密度; 其中第二轨道密度优选地大于第一轨道密度。 在磁盘旋转期间，几个磁头中的每一个都包含一个读取和写入信息的传感器。 在这种配置下，较低的存储密度第一磁盘表面用于存储经常访问的数据，而较高的存储密度第二磁盘表面用于存储容量补充，使得直接存取存储设备的总数据存储容量可以在没有 降低数据访问性能。

公开(公告)号：US06532259B1

公开(公告)日：2003-03-11

申请号：US09407595

申请日：1999-09-28

申请人： Gregory Scott Bush ,  John Jeffrey Stephenson

发明人： Gregory Scott Bush ,  John Jeffrey Stephenson

IPC分类号： H04B304

CPC分类号： H04L25/03038 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10222 ,  H04L7/0058 ,  H04L7/10 ,  H04L2025/03477

摘要： An equalization method and apparatus with gain adjustment are provided for a direct access storage device (DASD) data channel. A direction for moving each of a plurality of tap weights is calculated. New tap weights are determined for each of a plurality of tap weights in the direction. A gain of the FIR filter for the new tap weights is compared with a set threshold gain value. A gain of a gain loop of the data channel is incrementally adjusted responsive to the compared gain and set threshold gain values. A phase lag of the FIR filter for the new tap weights is compared with a set threshold phase lag value. A phase of a timing loop of the data channel is incrementally adjusted responsive to the compared phase lag and set threshold phase lag values.

摘要翻译： 为直接访问存储设备（DASD）数据通道提供具有增益调整的均衡方法和装置。 计算用于移动多个抽头权重中的每一个的方向。 为方向上的多个抽头权重中的每一个确定新的抽头权重。 将新抽头权重的FIR滤波器的增益与设定的阈值增益值进行比较。 响应于比较的增益和设定的阈值增益值，增量地调整数据通道的增益环路的增益。 将新抽头权重的FIR滤波器的相位滞后与设定的阈值相位滞后值进行比较。 响应于比较的相位滞后和设定的阈值相位滞后值，数据通道的定时循环的相位被递增地调整。

公开(公告)号：US06636562B1

公开(公告)日：2003-10-21

申请号：US09489316

申请日：2000-01-21

申请人： Richard Leo Galbraith ,  John Jeffrey Stephenson

发明人： Richard Leo Galbraith ,  John Jeffrey Stephenson

IPC分类号： H03H730

CPC分类号： G11B20/10037 ,  G11B20/10027 ,  G11B20/10046 ,  G11B20/1403 ,  H03H21/0012

摘要： An unconstrained equalization method and apparatus with gain and timing bias to control runaway are provided for a direct access storage device (DASD) data channel. A direction for moving each of a plurality of tap weights of a finite impulse response (FIR) filter is calculated. New tap weights are determined for each of a plurality of tap weights in the direction. A gain of the FIR filter for the new tap weights is compared with a set threshold gain value. A polarity of a gain bias is set to adjust a gain of a gain loop of the data channel by a preselected amount responsive to the compared gain and set threshold gain values, A phase lag of the FIR filter for the new tap weights is compared with a set threshold phase lag value. A polarity of a timing bias is set to adjust a phase lag of a timing loop of the data channel by a preselected amount responsive to the compared phase lag and set threshold phase lag values.

摘要翻译： 为直接存取存储设备（DASD）数据通道提供了一种无约束均衡方法和具有增益和定时偏置来控制失控的装置。 计算用于移动有限脉冲响应（FIR）滤波器的多个抽头权重中的每一个的方向。 为方向上的多个抽头权重中的每一个确定新的抽头权重。 将新抽头权重的FIR滤波器的增益与设定的阈值增益值进行比较。 设置增益偏置的极性，以响应于比较的增益和设定的阈值增益值来调整数据通道的增益环路的增益预先选择的量，将新抽头权重的FIR滤波器的相位滞后与 设定的阈值相位滞后值。 设定定时偏置的极性，以响应于比较的相位滞后和设定的阈值相位滞后值来调整数据通道的定时循环的相位滞后预选量。

公开(公告)号：US06393511B1

公开(公告)日：2002-05-21

申请号：US09246513

申请日：1999-02-09

申请人： David William Albrecht ,  Wayne Leung Cheung ,  Kok-Kia Chew ,  Ju-Hi Hong ,  John Jeffrey Stephenson

发明人： David William Albrecht ,  Wayne Leung Cheung ,  Kok-Kia Chew ,  Ju-Hi Hong ,  John Jeffrey Stephenson

IPC分类号： G06F1200

CPC分类号： G11B21/083 ,  G11B5/012 ,  G11B5/4886 ,  G11B5/59605

摘要： A multi-track density direct access storage device is disclosed. In accordance with a preferred embodiment of the present invention, a direct access storage device for data storage within a data processing system comprises a housing, a rotatable spindle, at least one disk, and several heads. The disk is fixedly mounted to the rotatable spindle, and the rotatable spindle is rotated by a motor within the housing. A first disk surface of the disk has a first track density and a second disk surface of the disk has a second track density; wherein the second track density is preferably greater than the first track density. Each of the several heads contains a transducer to read and write information from and to the disk during the disk rotation. Under this configuration, the lower storage density it first disk surface is utilized to store data that are frequently accessed while the higher storage density second disk surface is for storage capacity supplementation such that the total data storage capacity of the direct access storage device can be increased without degrading the data-accessing performance.

摘要翻译： 公开了一种多轨密度直接存取存储装置。 根据本发明的优选实施例，用于数据处理系统内的数据存储的直接存取存储装置包括壳体，可旋转主轴，至少一个盘和多个头部。 盘被固定地安装到可旋转的主轴上，并且可旋转的主轴由壳体内的电动机旋转。 盘的第一盘表面具有第一轨道密度，盘的第二盘表面具有第二轨迹密度; 其中第二轨道密度优选地大于第一轨道密度。 在磁盘旋转期间，几个磁头中的每一个都包含一个读取和写入信息的传感器。 在该配置下，第一盘表面的较低存储密度用于存储经常访问的数据，而较高存储密度第二磁盘表面用于存储容量补充，使得可以增加直接存取存储设备的总数据存储容量 而不会降低数据访问性能。

公开(公告)号：US6104566A

公开(公告)日：2000-08-15

申请号：US989471

申请日：1997-12-12

申请人： John Jeffrey Stephenson

发明人： John Jeffrey Stephenson

IPC分类号： G11B19/28 ,  H02P6/06 ,  H02P23/00 ,  G11B15/46

CPC分类号： G11B19/28

摘要： A method and apparatus are provided for variable spindle rotation speed in a direct access storage device (DASD). The direct access storage device (DASD) includes a multi-phase, brushless, direct current (DC) spindle motor. Speed and commutation control signals are applied to a plurality of spindle motor drivers for normally operating the plurality of spindle motor drivers in saturation mode while performing read and write operations. A spindle rotational speed is detected and compared with a predetermined spindle speed range. Responsive to the detected spindle rotational speed being within said predetermined spindle speed range, normal operations of the direct access storage device (DASD) are enabled. One or more write sync fields are provided on each surface of a magnetic disk media. The write sync field is used for timing write operations in the direct access storage device.

摘要翻译： 在直接存取存储装置（DASD）中提供了用于可变主轴转速的方法和装置。 直接存取存储设备（DASD）包括多相，无刷直流（DC）主轴电机。 速度和换向控制信号被施加到多个主轴电动机驱动器，用于在执行读取和写入操作的同时在饱和模式下正常地操作多个主轴电机驱动器。 检测主轴旋转速度并与预定的主轴转速范围进行比较。 响应于检测到的主轴转速在所述预定的主轴转速范围内，直接存取存储装置（DASD）的正常操作被启用。 在磁盘介质的每个表面上提供一个或多个写同步字段。 写入同步字段用于直接访问存储设备中的定时写入操作。