| 摘要 |
<p>A storage region providing device provides a physical storage region (a physical region) as a virtual storage region (a logical region). The device accepts a writing request including data and information for specifying a partial logical region that is part of the logical region. In a case that part of the physical region is not allocated yet to a partial logical region specified by a writing request, the device allocates at least part of an initial allocation region of the physical allocation region to the partial logical region. The device moves data stored in the partial physical region included in the initial allocation region, to a movement destination region that is at least part of a reallocation region other than the initial allocation region of the physical region, and reallocates the movement destination region to the partial logical region.</p> |
