Patent ID: 7606129

Claim:
A disk controlling apparatus that controls a disk apparatus, comprising: a storage disk into which the disk apparatus writes and rewrites data and from which the disk apparatus reads data; an environment information creating unit that creates environment information that includes at least information relating to a temperature inside the disk apparatus as one type of information relating to an environment of the disk apparatus, wherein the temperature is detected when the data is written; a storing unit that inputs the environment information in a wasteful data region that is generated when a byte of data is converted to a symbol of data, in which dummy data is stored, as data to be written to the storage disk instead of the dummy data, wherein each environmental information inputted and each data that corresponds to each environmental information are written into the storage disk in a correlated form, and the wasteful data region and the data are included in a symbol data generated by converting units of the data from bytes to symbols; and a rewrite process determining unit that determines whether to execute a rewrite process for rewriting data in the storage disk based on the environment information that corresponds to the data read from the storage disk.