Abstract: A record carrier having essentially circular tracks concentrically located around a point of rotation. The record carrier is divided into circular zones each having m tracks, where m is an integer. Each track within a zone is subdivided into n sectors, where n is an integer which is constant per zone and which increases as the zone is more remote from the point of rotation. Each sector including a header portion and a data portion. The header portions in the radial direction in each zone are in line. In each zone the condition of m*n=j*k is satisfied, where is j an integer greater than or equal to 2 and is constant for each zone, and k is an integer.
Type:
Grant
Filed:
July 2, 1993
Date of Patent:
May 23, 1995
Assignees:
International Business Machines Corporation, U.S. Philips Corporation
Inventors:
Johannus L. Bakx, Paulus G. P. Weijenbergh, Karl A. Belser, Glen A. Jaquette, John E. Kulakowski, Judson A. McDowell, Rodney J. Means