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:
Apr. 27, 2004
Filed:
Mar. 20, 2001
Akira Yamamoto, Cupertino, CA (US);
Takao Satoh, Kanagawa, JP;
Shigeo Honma, Kanagawa, JP;
Yoshihiro Asaka, Kanagawa, JP;
Yoshiaki Kuwahara, Kanagawa, JP;
Hiroyuki Kitajima, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method of respectively reading and writing data to and from a plurality of physical disk units in response to I/O requests from a host computing system includes establishing a logical disk group having a number of logical disk elements, mapping each of the logical disk elements to corresponding physical disk units, receiving from the host computing system an I/O request for data to select a one of the number of logical disk elements, accessing the physical disk unit corresponding to the selected one logical disk to access for the data, and transferring the accessed data to the host computing system.