公开(公告)号：SG46192A1

公开(公告)日：1998-02-20

申请号：SG1996000419

申请日：1991-09-06

Applicant: IBM

Inventor： BROWN DANA HENRY ,  CUNNINGHAM EARL ALBERT ,  ERICKSON KEVIN JACK ,  ESTRY RICHARD HUNT ,  GLASER THOMAS WILLIAM ,  HAGEN MARK DAVID ,  OTTESEN HAL HJALMAR ,  PALMER DEAN CURTIS ,  STEPHENSON JOHN JEFFREY

IPC: G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B7/08 ,  G11B21/02 ,  G11B21/08 ,  G11B5/265

Abstract: Disclosed is an apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element (40) and write element (42). Basically, the offset is determined at a first position and at a second position of the actuator arm (48) 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.

公开(公告)号：DE69125447D1

公开(公告)日：1997-05-07

申请号：DE69125447

申请日：1991-09-06

Applicant: IBM

Inventor： BROWN DANA HENRY ,  CUNNINGHAM EARL ALBERT ,  ERICKSON KEVIN JACK ,  ESTRY RICHARD HUNT ,  GLASER THOMAS WILLIAM ,  HAGEN MARK DAVID ,  OTTESEN HAL HJALMAR ,  PALMER DEAN CURTIS ,  STEPHENSON JOHN JEFFREY

IPC: G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B7/08 ,  G11B21/02 ,  G11B21/08 ,  G11B5/265

Abstract: Disclosed is an apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element (40) and write element (42). Basically, the offset is determined at a first position and at a second position of the actuator arm (48) 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.

公开(公告)号：GB2286481A

公开(公告)日：1995-08-16

申请号：GB9501719

申请日：1995-01-24

Applicant: IBM

Inventor： BROWN DANA HENRY ,  HAGEN MARK DAVID ,  PURKETT JOHN CHARLES

IPC: G11B21/10 ,  G11B5/596 ,  G11B5/55

Abstract: A phase modulated servo method and apparatus provides acceptable position linearity for servo positioning with a narrow transducer head in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface for storing data and has a transducer mounted for movement across the disk surface for writing to and for reading data and servo patterns from the disk surface. The transducer includes a read element and a write element. The read element has a width less than the write element and the read element width is greater than 113 of a data cylinder and less than 1/2 of a data cylinder. A servo pattern is written on the data disk surface having a track pitch of less than 1/2 of a data cylinder and the servo pattern repeats in a selected binary number of data cylinders.