MEMORY CONTROLLER, NONVOLATILE STORAGE DEVICE, ACCESS DEVICE, AND NONVOLATILE STORAGE SYSTEM

摘要

A nonvolatile storage device reads and writes file data according to a file identifier specified by an access device. The nonvolatile storage device includes a capacitance parameter decision unit (260) which generates a capacitance parameter associated with a usable capacity of a nonvolatile memory (210). Even if a defective region of the nonvolatile memory is gradually increased as the use is continued, a capacity parameter decision unit (161) reduces the defective region to a normal region in accordance with increase of the defective region. The capacity parameter reporting unit reports the reduced capacity parameter to the access device. According to the reported capacity parameter, the access device manages the total size of all the files to be read and written.