公开(公告)号：WO1991006947A1

公开(公告)日：1991-05-16

申请号：PCT/US1990005835

申请日：1990-10-11

Applicant: CONNER PERIPHERALS, INC.

Inventor： CONNER PERIPHERALS, INC. ,  SQUIRES, John, P. ,  BAGNELL, Glade, N. ,  SANDER, Charles, M. ,  ANDERSON, Kurt, M.

IPC: G11B05/596

CPC classification number: G06F3/0601 ,  G06F2003/0692 ,  G11B5/4813 ,  G11B5/5578 ,  Y10S360/902 ,  Y10S360/903

Abstract: A multiple actuator disk drive (20) utilizes multiple heads (46a-j, 47a-j) associated with respective ones of multiple actuators (341, 342) to read data from and write data to all tracks on the surface of a disk. The positioning of each head by the respective actuators (341, 342) is controlled by embedded servo-information recorded in the data tracks. The data tracks have a density of greater than 2000 tracks per inch. Utilizing two actuators (341, 342) provides access times which are reduced with respect to the access times provided by disk drives having a single actuator and an increased data transfer rate.

公开(公告)号：WO1990012391A1

公开(公告)日：1990-10-18

申请号：PCT/US1990001866

申请日：1990-04-05

Applicant: DIGISYS CORPORATION

Inventor： DIGISYS CORPORATION ,  LIU, Hsinlai, Chris

IPC: G11B05/596

CPC classification number: G11B5/59633

Abstract: Method and apparatus is provided for writing and reading data from a rotatable disk (12). Utilizing the apparatus of the present invention, the method includes the steps of formatting the disk (12) with a plurality of spaced apart generally circular servo tracks (26) with data tracks (28) disposed therebetween. A servo signal is recorded on the servo tracks (26) and in one embodiment of the invention the position of adjacent data tracks (28) is determined from the position of the servo track (26) on an open loop basis. No embedded servo tracks are utilized in the present invention, nor is there a need for closed loop servo system.

公开(公告)号：WO1989008308A1

公开(公告)日：1989-09-08

申请号：PCT/DE1989000084

申请日：1989-02-13

Applicant: SIEMENS AKTIENGESELLSCHAFT ,  PELLERT, Martin ,  ETZBACH, Rupert

Inventor： SIEMENS AKTIENGESELLSCHAFT

IPC: G11B05/596

CPC classification number: G11B5/5965

Abstract: Servo position information is recorded conventionnally by data heads (34) independently of the position of a servo head (33) above a servo surface (220). During writing and reading of data, however, the position of the data heads is controlled to permit track following and readjusted on the basis of the servo position information, and thus the range of dynamic and static control of the data heads is unnecessarily restricted. Recording of the servo position information is carried out by means of data heads controlled to permit track following. The data heads so positioned are then transferred to a preassembled magnetic disc store (1) for recording the servo position information of each data track centre predetermined by the servo head in accordance with a constant value (ya) in a radial direction and with variable values (yi) of a transfer matrix (Yht) in the opposite radial direction of the record carrier. The process is used to increase the track density per data surface (221) of the record carrier and hence the storage capacity of the magnetic disc store.

公开(公告)号：WO1988002913A1

公开(公告)日：1988-04-21

申请号：PCT/US1987002646

申请日：1987-10-14

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  SEAVER, Jay ,  SEUBERLING, Frank

IPC: G11B05/596

CPC classification number: G11B5/5547

Abstract: Methods and apparatus for performing track to track seeking on a hard disk drive memory. The present invention utilizes a gradual acceleration and deceleration profile to reduce the acoustical noise generated during seek operations. A seek profile is defined based on the starting position and desired ending position of the seek (11, 12). Programmable parameters (13-15) contained in the servo information are used in generating a seek profile. These parameters may be altered for different disk drive systems without the need to alter the control circuitry for performing the seek. In the present invention, a closed control loop (16-19) is utilized for both performing seeks and for the control of track following (centering the head on a desired track). In addition to reducing the acoustical noise during seek operations, the present invention results in reduced settling times of the head at the end of a seek resulting in seek time equal to or less than those of conventional methods.

Abstract translation: 用于在硬盘驱动器存储器上执行跟踪追踪的方法和装置。 本发明利用逐渐的加速和减速曲线来减少在寻道操作期间产生的声音噪声。 基于搜索的起始位置和期望的结束位置来定义搜索简档（11,12）。 包含在伺服信息中的可编程参数（13-15）用于产生寻道曲线。 这些参数可以针对不同的磁盘驱动器系统而改变，而不需要改变用于执行搜索的控制电路。 在本发明中，闭合控制回路（16-19）用于执行寻道和用于控制轨道追踪（将磁头定位在期望轨道上）。 除了在搜索操作期间降低声音噪声之外，本发明导致在搜索结束时头部的建立时间减少，导致寻找时间等于或小于常规方法的寻道时间。