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.