Patent ID: 11907113
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The magnetic disk device of claim 2, wherein
in the third allocation processing,
the controller allocates, when a next objective track to which logical addresses are to be allocated subsequently to the objective track including the sectors to which logical addresses are to be allocated is not included in the first area, logical addresses to the sectors of the objective track, and
when the next objective track is included in the first area, calculates each of a position of a sector-in-front-of-defect which is the sector to which a tail-end logical address is allocated on the objective track and a position of a sector-behind-defect which is the sector to which a top logical address is allocated on the next objective track on the basis of the skew value of the head relative to the next objective track, a seek sector number to be set according to the time required by the head to carry out seeks to tracks of a number included in the first area, and a defect area including the sector in which the defect exists and sectors of a predetermined number adjacent to the sector concerned.