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:
Jan. 17, 2006
Filed:
Mar. 07, 2003
Kyo Akagi, Fuchu, JP;
Kouki Uefune, Odawara, JP;
Naoki Satoh, Odawara, JP;
Terumi Takashi, Chigasaki, JP;
Atsushi Saito, Chigasaki, JP;
Kyo Akagi, Fuchu, JP;
Kouki Uefune, Odawara, JP;
Naoki Satoh, Odawara, JP;
Terumi Takashi, Chigasaki, JP;
Atsushi Saito, Chigasaki, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
In a magnetic disk apparatus which is removably mounted or embedded to a host apparatus and intermittently accessed for recording/reproducing data, a RAM contained in the host apparatus is utilized for a portion or entirety of a buffer RAM for use in the intermittent access to accomplish a reduction in size and cost of the magnetic disk apparatus. In addition, the magnetic disk apparatus is controlled to rotate a magnetic disk at a variable rotational speed, and operated at a rotational speed at which the total power consumption is minimized in accordance with the capacity of the utilized buffer RAM and whether an access is made for recording or reproduction, thereby improving a power saving effect.