Magnetic disk recording and reproducing apparatus

摘要

A magnetic recording and reproducing apparatus of a type wherein a magnetic disk having a magnetic recording layer formed on a rigid substrate is rotatable at a high speed and a magnetic head is disposed on the surface of the disk so that magnetic recording and reproduction are conducted by the head while rotating the disk at a high speed, wherein the surface roughness Rmax of the magnetic disk is adjusted at a level of at most 100 ANGSTROM , and the flying height of the magnetic head at the initiation of flying is adjusted at a level within a range of from 0.01 to 0.04 mu m.