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. 05, 2014
Filed:
May. 02, 2013
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Takafumi Maruyama, Hadano, JP;
Megumu Hasegawa, Hadano, PA (US);
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
An HBA driver manages a queue number for enqueuing and dequeuing data to an I/O queue by the main storage, and HBA-F/W manages a storage region at inside of HBA. The HBA driver reduces the number of access times by way of the PCIe bus by noticing an enqueued queue number or a dequeued queue number of an I/O queue to HBA-F/W by utilizing an MMIO area of the main storage in which a storage region on HBA is mapped.