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. 11, 2011
Filed:
Mar. 31, 2008
Mitsumasa Kubo, Tachikawa, JP;
Yutaka Kobayashi, Musashino, JP;
Mitsumasa Kubo, Tachikawa, JP;
Yutaka Kobayashi, Musashino, JP;
TEAC Corporation, Tama-shi, Tokyo, JP;
Abstract
A disk drive and an information processing system optimizes the number of rotations of a disk. Data read from a disk and previously-read cache data are temporarily stored in buffer memory. When a total amount of cache data achieved during a given period of time Tor an average amount of the same is equal to or less than a threshold value X, a system controller controls the number of rotations in an increasing manner, thereby optimizing the number of rotations. When a total amount of cache data achieved during a given period of time T(TT) or an average amount of the same is equal to or greater than a threshold value X, a system controller controls the number of rotations in an decreasing manner, thereby optimizing the number of rotations.