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. 08, 2007
Filed:
Jul. 02, 2004
Aki Tomita, Kawasaki, JP;
Aki Tomita, Kawasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A data I/O system comprises a plurality of storage devices and a controller which controls the storage devices. In the data I/O system, the controller further includes a read/write unit, responsive to the subsequent receipt of a read request and a write request, for reading data stored in the storage devices and writing data in the storage devices, a logical volume management unit for mapping between a logical image of the data storage of a host processor (logical volume) and an actual space in the storage devices, a volume management unit for managing an active primary production volume (P-VOL) and second multiple mirror volumes (S-VOL) created as mirror images of the primary volume, and an S-VOL restoring unit for restoring the data of a first S-VOL with the data of a second S-VOL depending on the type of an error that happens in the first S-VOL.