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:
May. 06, 2014
Filed:
Sep. 02, 2010
Takumi Sano, Odawara, JP;
Isamu Kurokawa, Odawara, JP;
Akihiro Mori, Odawara, JP;
Ran Ogata, Odawara, JP;
Yuya Goto, Odawara, JP;
Takumi Sano, Odawara, JP;
Isamu Kurokawa, Odawara, JP;
Akihiro Mori, Odawara, JP;
Ran Ogata, Odawara, JP;
Yuya Goto, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage apparatus includes a microprocessor package configured to access a logical volume and a local memory in the microprocessor package. An input/output (I/O) request range of one I/O request, including a start position address and an end position address of the logical volume which is a target of the one I/O request, is stored in the local memory. A counter value indicating a number of I/O requests to and from the logical volume associated with the one I/O request is acquired and stored in the local memory. If the counter value associated with the one I/O request is greater than the counter value associated with another I/O request, the I/O request ranges of the one I/O request and the other I/O request are compared. If there is no overlap between the I/O request ranges, the one I/O request is executed; otherwise, the one I/O request is placed on standby.