STORAGE APPARATUS AND STORAGE APPARATUS CONTROL METHOD

摘要

A storage apparatus, including a first group including first storage media storing data and a second group including second storage media storing no data, makes an area of the first storage media which stores updating target data an invalid area and to store updated data into an area of the first storage media, migrates to the second storage media data stored in an area other than the invalid areas of the set of the first storage media when determining that the first group includes the set of the first storage media in which the sum of the invalid areas is not less than the capacity of the one storage medium, and moves a group including the first storage media from which migration of the data is completed from the first group to the second group.

主权项

1. A storage apparatus, comprising:
a plurality of storage media; a group management unit configured to manage a first group including first storage media storing data among the storage media, and a second group including second storage media storing no data among the storage media; a data storage unit configured to make an area of the first storage media which stores update target data an invalid area and to store updated data into an area of the first storage media; a determination unit configured to determine whether or not the first group includes a set of the first storage media in which a sum of the invalid areas is equal to or larger than capacity of one of the storage media; a data migration unit configured to migrate to the second storage media data stored in an area other than the invalid areas of the set of the first storage media, when the determination unit determines that the first group includes the set of the first storage media in which the sum of the invalid areas is equal to or larger than the capacity of the one storage medium; and a movement unit configured to move a group including the first storage media from which migration of the data by the data migration unit is completed from the first group to the second group.