| 摘要 |
A magnetic disk unit writes, on a magnetic disk, a burst position error data which is used for correcting a positional error of a burst pattern which is used for correcting an error within one track, next to the burst pattern. A write head is controlled a position so as to satisfy a relationship M=N when (N-1)K <WHD<NK, where WHD denotes a core width of a write head, K denotes a pitch of burst boundaries of the burst pattern, and M denotes a number of regions of the burst position error data which need to be provided after the burst pattern. The burst position error data is written on the magnetic disk by the write head the position of which is controlled in this manner.
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