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:
Dec. 02, 2008
Filed:
Nov. 28, 2006
Hideaki Fukuda, Odawara, JP;
Naoki Moritoki, Odawara, JP;
Hideaki Fukuda, Odawara, JP;
Naoki Moritoki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Proposed is a highly reliable storage apparatus with fast access speed and low power consumption, as well as a controller and control method for controlling such a storage apparatus. This storage apparatus is equipped with a flash memory that provides a storage extent for storing data, a disk-shaped memory device with more data write cycles than the flash memory, and a cache memory with faster access speed than the flash memory. Data provided from a host system is stored in the cache memory, this data is read from the cache memory at a prescribed timing, data read from the cache memory is stored in the disk-shaped memory device, and, when a prescribed condition is satisfied, this data is read from the disk-shaped memory device, and the data read from the disk-shaped memory device is stored in the flash memory.