Patent ID: 7752405

Claim:
A data recording apparatus that stores same data in a first storage device and a second storage device, the first storage device and the second storage device being formed of a plurality of areas each having a data volume, the data recording apparatus comprising: a determining unit that: determines whether a storable area is present in the first storage device, the storable area being a combination of a plurality of empty areas having contiguous physical addresses with a total data volume larger than that of a volume of the data, and determines, when no storable area is present in the first storage device, whether a combined area is present in the first storage device, the combined are being a combination of a plurality of backed-up areas storing therein data that has already been stored in the second storage device or a combination of the empty area and the backed-up area, and the combined area having contiguous physical addresses with a total volume larger than or equal to that of the volume of the data; a first storage unit that: stores the data in the storable area, when the determining unit determines that the storable area is present in the first storage device, and stores the data in the combined area, when the determining unit determines that the combined area is present in the first storage device; and a second storage unit that: stores the data that has been stored by the first storage unit as a lump into the second storage device.