| 摘要 |
PURPOSE:To decrease the occurring frequency of the error of data replacement by discriminating the track form of a using disk, executing the data writing/ reading control at one track unit at the time of a double track form and executing the writing/reading control of the data at two track units at the time of a signal track form. CONSTITUTION:In the disk drive for a double track, it is discriminated whether the using disk is a double track form or a single track form. At the time of the double track form, the writing/reading control is executed for the data by one track unit and at the time of the single track form, the writing/reading control is executed for the data by two track units. Thus, the occurring frequency of the error at the time of executing the data replacement by the disk of the single track can be decreased between a double track disk drive and the single track disk drive.
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