Patent ID: 7525748
Filing Date: 2009-04-28
Classification: G11B

Abstract:
1. An apparatus for recording or reproducing data on a magnetic disk that employs a perpendicular magnetic recording and includes a recording area and a monitor area storing data of a neighboring area of the recording area, the apparatus comprising: a determining unit that retrieves status information relating to recording or reproducing data on the recording area, and determines whether to re-record data recorded in the neighboring area based on the retrieved status information; and a re-recording unit that re-records data recorded in the neighboring area by retrieving data of the neighboring area from the monitor area, when the determining unit determines to re-record, and resets the status information corresponding to the recording area, wherein the re-recording unit includes a temporary storing unit that stores the data recorded in the monitor area whose address is spaced from both the recording area and the neighboring area to be re-recorded in a place other than on the magnetic disk until re-recording.