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. 01, 2012
Filed:
Dec. 03, 2008
Toshiki Kamohara, Odawara, JP;
Shiori Inoue, Kawasaki, JP;
Naoto Yanagi, Kamakura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
By considering a device life and time needed for data migration, data stored in a storage apparatus is securely preserved until a retention term of each of the data. Multiple disk devicesA toC that store a data file generated by a service server apparatusare included. A migration managerof a management server apparatusacquires preservation period information that indicates a preservation period of the data file from the service server apparatus, and calculates a preservation term of the data file based on the preservation period information. The migration managerof the management server apparatusalso acquires data amount information of the data file from the service server apparatus, and calculates a necessary time needed for migrating the data file to other disk devices AA toC. When the preservation term comes later than an operation guarantee term recorded in advance for each of the disk devicesA toC, the migration managerof the management server apparatuscompares the end of the migration with the operation guarantee term, and determines the necessity of the migration.