Storage control apparatus, data management system and data management method

A storage system comprising:

• a plurality of disk devices storing data received from a host computer;
• a plurality of non-volatile devices storing data received from the host computer;
• and
• a processing unit controlling read/write requests received from the host computer to a plurality of logical volumes corresponding to the plurality of disk devices and the plurality of non-volatile devices, and managing relation between storage layers of the plurality of disk devices and the plurality of non-volatile devices corresponding to the plurality of logical volumes and attribution information of each of the plurality of disk devices and the plurality of non-volatile devices,
• wherein the processing unit determines a first storage layer of the storage layers as a source storage layer and a second storage layer of the storage layers as a destination storage layer, based on a user policy, and migrates data stored in at least one of the logical volumes of the first storage layer to at least one of the logical volumes of the second storage layer, based on the user priority.