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:
Oct. 22, 2019
Filed:
Jan. 28, 2015
Hitachi, Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The processor provides a host computer with a logical volume based on a physical storage device. Based on a command from the host computer, the control device writes, into a memory, address information that associates a logical address in the logical volume with a device address in the physical storage device. The control device receives a command from the host computer and if it is determined that the command is a read command, identifies a first logical address designated by the command and determines whether or not the first logical address is included in the address information. If the first address is included in the address information, the control device specifies a first device address corresponding to the first logical address, reads read data stored in an area indicated by the first device address, and transmits the read data to the host computer.