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:
Oct. 21, 2003
Filed:
Mar. 27, 2002
Applicant:
Inventor:
Yuichiro Tomishima, Sendai, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
A method for reading data from an unbalanced disk in a disk drive is disclosed. The method includes the steps of measuring a degree of unbalance of the disk while starting up a rotation of the disk, determining a suitable rotating speed for error-free reading (e.g., a maximum error-free reading speed) corresponding to the measured degree of unbalance, based on a previously stored relationship between degree of unbalance and suitable rotating speed, and beginning a reading operating while rotating the disk at the determined rotating speed. In accordance with the method, it is possible to suppress an unbalanced disk from vibrating, thereby achieving a stable data reading from the disk.