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:
Feb. 07, 1989
Filed:
Apr. 20, 1987
Toshiyuki Haruna, Odawara, JP;
Kenji Nishimura, Kanagawa, JP;
Yuji Yoshida, Odawara, JP;
Kiyotaka Takahashi, Atami, JP;
Tsuneo Hirose, Odawara, JP;
Katsuhiro Tsuneta, Odawara, JP;
Riichi Nakano, Odawara, JP;
Kazuto Takahashi, Hadano, JP;
Akira Kurano, Odawara, JP;
Tadayuki Ichiba, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Computer Peripherals Co., Ltd., Tokyo, JP;
Abstract
In a magnetic disk unit for recording/reproducing data onto/from a disc by means of a magnetic head on the basis of a seek command and a recording/reproducing command received from a host processor, the execution of the data reproducing command for the disk is started upon detection of a state that the magnetic head has sought on a desired track to an extent that the centering state is still unstable but the data can be reproduced, and the execution of the data recording command is started upon detection of a condition that the magnetic head has reached the stable centering state on the desired track after the detection of the reproducible state.