Magnetic disk apparatus.

摘要

Disclosed is a highly reliable magnetic disk apparatus having a large storage capacity, which comprises a magnetic disk (1) on which a magnetic clock pattern region (42) for giving a common timing reference between a data recording region (44) and adjacent tracks and a unique pattern region (43) for specifying position of the magnetic clock pattern (42) in the circumferential direction are independently formed; a playback means (48) for reproducing information recorded on the magnetic disk (1); a clock generating means (51) for generating a data existing point clock using reproduced signals of the magnetic clock pattern region (42) and unique pattern region (43) on the magnetic disk (1); and a data detecting means (50) for detecting data from the reproduced signals of the data region (44) of magnetic disk (1) depending on a data existing point clock generated by the clock generating means (51). <IMAGE>