Hitachi Global Storage Technologies Netherlands B.v.

Akira Osaki

Nobuhiro Kuwamura

Masaomi Ikeda

Yoshihiko Maeda

Toshihiko Tsunokawa

A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisional boundaries. The method also includes determining a linear recording density for a selected zone. The method further includes selecting the number of data sectors per data track corresponding to the determined linear recording density from specified values. Moreover, the method includes resetting a boundary of the zone at a new boundary shifted from the provisional boundary according to a selected value.

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Kanagawa, Japan

Akira Osaki