公开(公告)号：DE3750380T2

公开(公告)日：1995-03-30

申请号：DE3750380

申请日：1987-05-05

Applicant: IBM

Inventor： NG CHAN YIU ,  OUCHI NORMAN KEN ,  WANG DAVID TAR-WEI ,  YU WELLINGTON CHIA-PEIR

IPC: G11B20/12 ,  G11B27/30

Abstract: A record that emulates a first recording format, which includes a track reference point, such as an index field, used for determining a position of a record on a track according to the first recording format, is recorded on a moving storage device operating according to a second recording format which also includes a track reference point by the following method. The method comprises the steps, responsive to location information generated according to the first recording format, of: (1) determining an original angular position of a record according to the first recording format; (2) calculating in response to the original angular position and a parameter a preferred angular position for the record according to the second recording format; (3) determining an actual angular position of the record recorded according to the second recording format; and (4) recording an extension of the record to compensate for the difference between the preferred angular position and the actual angular position. h

公开(公告)号：DE3750380D1

公开(公告)日：1994-09-22

申请号：DE3750380

申请日：1987-05-05

Applicant: IBM

Inventor： NG CHAN YIU ,  OUCHI NORMAN KEN ,  WANG DAVID TAR-WEI ,  YU WELLINGTON CHIA-PEIR

IPC: G11B20/12 ,  G11B27/30

Abstract: A record that emulates a first recording format, which includes a track reference point, such as an index field, used for determining a position of a record on a track according to the first recording format, is recorded on a moving storage device operating according to a second recording format which also includes a track reference point by the following method. The method comprises the steps, responsive to location information generated according to the first recording format, of: (1) determining an original angular position of a record according to the first recording format; (2) calculating in response to the original angular position and a parameter a preferred angular position for the record according to the second recording format; (3) determining an actual angular position of the record recorded according to the second recording format; and (4) recording an extension of the record to compensate for the difference between the preferred angular position and the actual angular position. h