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. 10, 2004
Filed:
Feb. 15, 2002
Satoshi Yagi, Ohi, JP;
Xiaoming Jiang, Minamiashigara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When only one type of a memory having an access rate necessary for high-speed data processing is equipped with a subsystem so as to accommodate the entire amount of storage required for the subsystem, a considerable rise in costs occurs. Therefore, in order to keep the rise in cost to a minimum, high-speed memory of a storage capacity required for the high-speed processing and low-speed memory of a storage capacity that can be safely employed for low-speed processing are both equipped with the disk memory system. With this arrangement, the rise in costs can be kept to a minimum, and access time to the memory can be reduced. The performance of the disk memory system can be thereby improved.