A storage control apparatus comprises a first storage area and a second storage area. Data in the first storage area is stored according to a first data format, and a host computer can exchange data with it using data access commands of the first data format. Data in the second storage area is stored according to a second data format different from the first data format, and a host computer can exchange data with it using data access commands of the second data format. The storage control apparatus further comprises a data recording format conversion unit that is configured to convert and store data that is stored in the first storage area to the second storage area.