The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 1994
Filed:
Aug. 17, 1993
Shunji Kitamura, Saitama, JP;
Tomihisa Ogawa, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A magnetic disk apparatus using a servo-surface servo and a data-surface servo is disclosed which comprises a servo disk which is disposed on a rotating axis and which has a servo surface on which first servo information is written and a data disk which is disposed on the rotating axis and which has a data surface. A servo head is provided for reading the first servo information from the servo disk and a read/write head is provided which works in association with the servo head for reading and writing information from and to the data surface. Structure is provided to generate a second servo information to be written on the data surface, to command a write timing of the second servo information, to control the write operation, and to control the positioning of the read/write head position. Thus, according to servo information being read from the servo head, servo information to be written to the data surface is generated and written to the data surface.