公开(公告)号：GB2286481B

公开(公告)日：1997-12-10

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 provide 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 at least one 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 ⅓ of a data cylinder and less than ½ of a data cylinder. A servo pattern is written on the data disk surface having a track pitch of less than ½ of a data cylinder and the servo pattern repeats in a selected binary number of data cylinders.

公开(公告)号：SG48989A1

公开(公告)日：1998-05-18

申请号：SG1996004947

申请日：1995-01-24

Applicant: IBM

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

IPC: G11B21/10 ,  G11B5/596 ,  G11B

Abstract: A phase modulated servo method and apparatus provide 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 at least one 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 ⅓ of a data cylinder and less than ½ of a data cylinder. A servo pattern is written on the data disk surface having a track pitch of less than ½ of a data cylinder and the servo pattern repeats in a selected binary number of data cylinders.

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.