PURPOSE: To prevent the attraction of a floating head slider and a magnetic disk at the time of stopping by having a save zone where the floating head slider stops and a data zone where information is recorded and forming the save zone to the surface roughness larger than the surface roughness of the data zone.

CONSTITUTION: This disk has the save zone 9 where the head slider for writing and reading out of information stops and the data zone 10 where the information is recorded. The save zone 9 is formed to the surface roughness larger than the surface roughness of the data zone 10 and the heights at the tops of the projecting parts of the ruggedness on the surface of the save zone 9 and the data zone 10 are uniformized. The magnetic disk which obviates the contact of the floating head slider and the magnetic disk and obviates the attraction at the time of stopping in spite of a decrease in the spacing between the floating head slider and the magnetic disk in order to increase the recording density of the disk is obtd. in this way.