Patent ID: 8411386
Filing Date: 2013-04-02
Classification: G11B

Abstract:
1. A data write control apparatus comprising: a magnetic disk comprising a track having sectors in which data is recorded; a write controller configured to execute control to write a sector data block to a predetermined sector in the track; and a retry controller configured to execute control to retry a process of writing to a predetermined number of sectors including a first sector to which data has been written, according to an error in a process of writing a sector data block to the first sector, and to manage a number of retries performed on each sector, wherein the write controller is configured to detect a first temporary defective sector based on the number of retries performed on each sector, and to exclude the first temporary defective sector from a target for the write process, the write controller is further configured to execute control to rewrite a plurality of sector data blocks that have been requested for rewriting to a plurality of sectors according to a rewrite instruction, and the retry controller is configured to recover the first temporary defective sector as a first normal sector, and include the first normal sector in the target for the write process when a rewrite to the first temporary defective sector is completed without an error, and to manage a number of rewrites to the first temporary defective sector with errors.