Patent ID: 8755137
Filing Date: 2014-06-17
Classification: G11B

Abstract:
1. A disk drive comprising: a disk comprising a sequential access area where data of a first size is sequentially written, the sequential access area comprising a second size larger than the first size; a head configured to concentrically or spirally write data to the disk; a management table configured to associate a calibration area with a physical address of the calibration area, the calibration area configured to calibrate a write condition for writing data to the disk using the head; a calibration module configured to calibrate the write condition using a first area as the calibration area when calibration is required, the first area configured to be where data is written next, a manager configured to manage a state where the first area is used as the calibration area to enter the calibration area in the management table in association with a physical address of the first area, and to delete an entry of the first area as the calibration area from the management table when the calibration is not required and when use of the first area as the calibration area has been entered in the management table; and a sequential write module configured to skip the first area used as the calibration area and to use the head to sequentially write from a second area, the second area following the first area in the sequential access area.