Magnetic recording reproducing apparatus and magnetic recording medium

Abstract

In information recording areas of a disc-shaped magnetic recording medium, recording columns adjacent to each other relative to a radial direction are formed to partially overlap with each other in the radial direction. A first recording and a second recording are selectively performed. In the first recording, a first recording column, a second recording column (the outer adjacent recording column of the first recording column) and a third recording column (the outer adjacent recording column of the second recording column) are formed so that the radial positions of the inner and outer circumferential edges of the first recording column, those of a second recording column, and those of a third recording column satisfy R<R<R<R<R<R. In the second recording, a non-overlapping portion which does not overlap with any of the recording columns in the radial direction is formed on each of the recording columns.