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 devices 40A to 40C that store a data file generated by a service server apparatus 30 are included. A migration manager 11 of a management server apparatus 10 acquires preservation period information that indicates a preservation period of the data file from the service server apparatus 30, and calculates a preservation term of the data file based on the preservation period information. The migration manager 11 of the management server apparatus 10 also acquires data amount information of the data file from the service server apparatus 30, and calculates a necessary time needed for migrating the data file to other disk devices A40A to 40C.

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 devices 40A to 40C that store a data file generated by a service server apparatus 30 are included. A migration manager 11 of a management server apparatus 10 acquires preservation period information that indicates a preservation period of the data file from the service server apparatus 30, and calculates a preservation term of the data file based on the preservation period information. The migration manager 11 of the management server apparatus 10 also acquires data amount information of the data file from the service server apparatus 30, and calculates a necessary time needed for migrating the data file to other disk devices A40A to 40C.

Abstract: This storage system collectively manages a plurality of types of file groups reaching storage time limit, and carries out data migration spanning a plurality of storage devices. Based on the respective file information, of the respective files distributed among the respective volumes, files, whose storage time limit arrives within a prescribed period of time, are grouped together as a migration group. The storage term of the group is made to coincide with the file having the most distant storage time limit of the respective files. A first migration is carried out on the basis of the priority of the respective storage devices. A second migration is executed on the basis of the device life of the respective storage devices and the storage term of the group.

Abstract: This storage system collectively manages a plurality of types of file groups reaching storage time limit, and carries out data migration spanning a plurality of storage devices. Based on the respective file information, of the respective files distributed among the respective volumes, files, whose storage time limit arrives within a prescribed period of time, are grouped together as a migration group. The storage term of the group is made to coincide with the file having the most distant storage time limit of the respective files. A first migration is carried out on the basis of the priority of the respective storage devices. A second migration is executed on the basis of the device life of the respective storage devices and the storage term of the group.