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. 29, 2000
Filed:
Mar. 27, 1998
Tetsuo Ueda, Sagamihari, JP;
Kiyoshi Satoh, Fujisawa, JP;
Hiroyuki Ono, Fujisawa, JP;
Toshiaki Wada, Sagamihara, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A disk drive and a control method for the disk drive to reduce the number of unnecessary write inhibition operations. A microprocessor unit (MPU) 6 sets an allowable value Cv for the velocity of a magnetic head 1 to V0 until the head passes over N1 sectors after completion of a seek operation, Cv to V1 until the head passes over N2 sectors after passage of N1 sectors, and Cv to V2 after passage of N2 sectors. (N1<N2 and V0<V1<V2) A hard-disk controller (HDC) 10 detects the velocity of the magnetic head 1, based on a position error signal PES from a servo sector regeneration section 8a, and prohibits the write operation of the magnetic head 1 if the velocity exceeds Cv.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile