Patent ID: 7920352
Filing Date: 2011-04-05
Classification: G11B

Abstract:
1. A magnetic disk apparatus that uses a head to write data in a plurality of unit areas arranged in an adjacent relationship to each other on a surface of a magnetic disk, comprising: a first recording section that records, in a memory, the position of a unit area which is a target of data write; a first counting section that counts the number of times of data write operation performed for the unit area corresponding to the position recorded by the first recording section; a second recording section that records, in a non-volatile storage medium different from the memory, the side position which is the position of a unit area adjacent to the unit area whose number of records counted by the first counting section is more than a predetermined value; a second counting section that counts the number of records of the side position recorded by the second recording section; and a rewriting section that reads out data recorded on the side position in the case where the number of records of the side position counted by the second counting section is more than a predetermined value, writes the read out data in a first position which is the position of a unit area different from the side position, and writes the same read out data in the side position after the write operation for the first position.