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:
Sep. 30, 2003
Filed:
Oct. 13, 2000
Atsushi Kanamaru, Kanagawa-ken, JP;
Hideo Asano, Machida, JP;
Akira Kibashi, Zama, JP;
Takahiro Saito, Yokohama, JP;
Keiji Kobayashi, Fujisawa, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method are provided that reduce the amount of data held commonly in both high-ranking and low-ranking cache memories, thereby having each of those cache memories hold data more efficiently. More particularly, a computer system is provided with an HDC card connected to an expansion bus and an HDD unit connected to the HDC card . The HDC card is provided with a disk cache (high-ranking cache memory) and the HDD unit is provided with a disk cache (low-ranking cache memory). The HDC card and the HDD unit exchange select information for selecting a swap mode of each cache memory when the system is started up, thereby selecting different swap modes according to the exchanged select information respectively.