Patent ID: 8705193
Filing Date: 2014-04-22
Classification: G11B

Abstract:
1. A magnetic disk control device, comprising: a write controller to control, in a magnetic disk having tracks, the each track being a storage area made by concentrically dividing a magnetic recording layer formed onto a disk into a plurality of areas, the each track being further divided into a plurality of areas in a rotative direction as sectors, writing information into the each sector; and a substitution controller to make, by detecting the sector or the track written at a frequency higher than a prescribed writing frequency based on a number of times of writing by the write controller to the sector or the track per prescribed unit time and by moving information recorded in an adjacent track adjacent to a high-writing-frequency track including the detected high writing frequency sector or to a high-writing-frequency track which is detected as a high writing frequency track to a track of a substitution area set in advance, the adjacent track be in an idle status, the idle status being a status of not being used.