Abstract: A storage management apparatus configured to allocate physical addresses in a physical storage area, to virtual addresses in a virtual storage area for storing data is provided. The storage management apparatus includes a processor that executes a process to define, in the physical area, a continuous area having a plurality of continuous physical addresses, and define, based on a virtual address to which a physical address in the continuous area has initially been allocated, an allocation range of virtual addresses for allocating the defined continuous area; and allocate a physical address in the defined continuous area to a virtual address in the defined relation range.

Abstract: A storage management apparatus configured to allocate physical addresses in a physical storage area, to virtual addresses in a virtual storage area for storing data is provided. The storage management apparatus includes a processor that executes a process to define, in the physical area, a continuous area having a plurality of continuous physical addresses, and define, based on a virtual address to which a physical address in the continuous area has initially been allocated, an allocation range of virtual addresses for allocating the defined continuous area; and allocate a physical address in the defined continuous area to a virtual address in the defined relation range.

Abstract: A storage controller that generates multiple versions of a snapshot of a storing device and that includes a first calculator that counts a first number of segments updated in a first snapshot that is to be deleted among the multiple versions of the snapshot but not updated in a second snapshot of a successive version to the first snapshot, a second calculator that counts a second number of segments updated in the second snapshot, and a determining processor that determines, when the first number is the second number or more, that the second snapshot and the first snapshot are a merging source and a merging destination in merging processing, respectively, and determines, when the first number is less than the second number, that the first snapshot and the second snapshot are the merging source and the merging destination, respectively, the merging source being merged into the merging destination.