Patent ID: 8856442

Claim:
A non-transitory computer-readable record medium storing a volume management program, the program comprising: a volume manager configured to form and manage a plurality of storage devices into a plurality of layers of storage space; an access manager configured to manage a record state and access state of each data block; a re-arrangement manager configured to determine a layer of each data block based on whether or not each data block is accessed, and change a storage location of each data block according to the determined layer of each data block; and a mapping manager configured to connect a physical block number with a logical block number of a file system, and manage the physical block number connected with the logical block number of the file system, wherein the plurality of layers comprises: a level 1 layer where data having an first access frequency is stored, a level 2 layer where data having an second access frequency is stored, and a level 3 layer where data having an third access frequency is stored, wherein the first access frequency is higher than the second access frequency, and the second access frequency is higher than the third access frequency, and wherein the level 1 layer is where the storage devices are maintained in a spin-up condition, and the level 3 layer is where the storage devices are maintained in a spin-down condition.