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:
Jan. 18, 2011
Filed:
Oct. 21, 2008
Yusuke Nonaka, Sagamihara, JP;
Akira Nishimoto, Sagamihara, JP;
Yusuke Nonaka, Sagamihara, JP;
Akira Nishimoto, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Maintenance storage system by storage system is enabled, and the removal or replacement of a storage system is enabled while continuing the operation of a system. In a computer system including a first storage system having a plurality of first storage devices and a second storage system having a plurality of second storage devices, when the number of the first storage devices under normal operation in the first storage system is equal to or smaller than a predetermined threshold, and data stored in the first storage devices under normal operation can be migrated to the second storage devices, the data stored in the first storage devices under normal operation are duplicated to the second storage devices, and information indicating that the first storage system can be removed from the computer system is output.