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公开(公告)号：CA1066410A
公开(公告)日：1979-11-13
申请号：CA268486
申请日：1976-12-22
Applicant: IBM
Inventor： LOUIS HELMUT , MATLA ARNO , SCHALLER KARL H , ZIMMERMANN VOLKER
Abstract: POSITIONING DEVICE FOR THE ACCESS ARM OF THE MAGNETIC HEAD OF A MAGNETIC DISK STORAGE The surface of a magnetic disk (23) is divided into servo sectors (S1) and data sectors (S2). A selectively positionable magnetic head (24) effects, in predetermined time intervals controlled by clock signals of a clock sensor (26), the transfer of servo and data signals. The servo signals sensed in the servo sectors are used for the track following control of the magnetic head. The servo markings (Ma) recorded in the servo sectors (S1) are arranged, with twice the width (2d) of the data tracks in radial distances of one respective track width (d), one beside the other in a row along a disk radius. In each servo sector at least three rows (A, B, C) of servo markings (Ma) are provided. The servo markings are arranged in track direction one behind the other in such a manner that between each of the rows (A, B, C) a distance (g) is formed, and that each servo marking of one row overlaps a servo marking of the following row by one track width (d).
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公开(公告)号：AU2437777A
公开(公告)日：1978-10-26
申请号：AU2437777
申请日：1977-04-18
Applicant: IBM
Inventor： LOUIS HELMUT , MATLA ARNO , SCHALLER KARL HEINZ , ZIMMERMANN VOLKER
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公开(公告)号：FR2336760A1
公开(公告)日：1977-07-22
申请号：FR7634523
申请日：1976-11-08
Applicant: IBM
Inventor： LOUIS HELMUT , MATLA ARNO , SCHALLER KARL H , ZIMMERMANN VOLKER
Abstract: The surface of a magnetic disk (23) is divided into servo sectors (S1) and data sectors (S2). A selectively positionable magnetic head (24) effects, in predetermined time intervals controlled by clock signals of a clock sensor (26), the transfer of servo and data signals. The servo signals sensed in the servo sectors are used for the track following control of the magnetic head.
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