Storage control apparatus and computer-readable recording medium storing program therefor

Abstract

A storage control apparatus is provided, which includes a memory and a control unit. The memory stores information about reference counts each indicating the number of logical addresses that reference a data block and information indicating an update status of each reference count. When a reference count is changed, the control unit updates the information about the reference count in the memory, sets the update status such as to indicate that the reference count has been updated, and at prescribed timing, stores the information about the reference count that has been updated in a storage device and sets the update status such as to indicate that the reference count has not been updated. When performing a process based on the reference counts, the control unit excludes data blocks corresponding to the reference counts that have been updated, from the process.

Dependencies are inferred from the claim text.