Magnetic disk having improved servo area for protecting equal time interval characteristics and for preventing azimuth loss

摘要

A magnetic disk is provided with a track divided by servo areas to record servo signals and data areas to record data signals. Within the servo area, an exclusive region is previously formed to specifically record the servo signal. In one embodiment, the servo region is formed along the moving locus of a magnetic head while writing and reading data, which extends both along the radial direction and peripheral direction of the magnetic disk.