Patent ID: 8688941
Filing Date: 2014-04-01
Classification: G06F

Abstract:
1. A storage system comprising: a plurality of storage devices; and a controller being operable to manage a plurality of logical storage areas, each of the plurality of logical storage areas having the same fixed-length, and the controller being operable to manage a plurality of volumes including a volume to which at least one of the plurality of logical storage areas is allocated on a logical storage area basis in order to write data to the volume, so that the data can be written to at least one of the plurality of storage devices, the controller being operable to compress data and, if the data is compressed, to store the compressed data to a set of the plurality of logical storage areas allocated to the volume, so that a number of allocated logical storage areas in the set is based on the compressed size of the data and the number of allocated logical storage areas in the set can be decreased relative to a status in which the data is not compressed.