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:
Aug. 16, 1994
Filed:
Jul. 02, 1991
Yuji Yamane, Odawara, JP;
Toshimitsu Kaku, Sagamihara, JP;
Yasushi Fukuda, Odawara, JP;
Hitoshi Komatsu, Kanagawa, JP;
Nobuhiro Matsumura, Kanagawa, JP;
Shigenori Okamine, Kodaira, JP;
Kiyoshi Matsumoto, Kokubunji, JP;
Soichi Isono, Yokohama, JP;
Kunihiko Kizaki, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a rotary type storage apparatus and a control method thereof, a plurality of concentric or spiral information tracks are set and also each of the plural information tracks is subdivided into a plurality of sectors along a circumferential direction, which constitute a plurality of information recording planes. Also, in this apparatus and method, there are provided a plurality of read/write heads employed at each of the information recording planes and accessible to the information tracks, and also a head drive mechanism for positioning these plural read/write heads to the information tracks. At least one of the plural information recording planes corresponds to such a recording plane where a substitution information track has been set, on which a substitution sector corresponding to a failed sector present at another information recording plane is recorded.