Method of recording servo information.

摘要

Storage capacity of a magnetic recording medium is increased by providing a nonconductive layer 11 over a magnetic layer 12 on which magnetic data 17 is writable in a series of recording tracks 17, and applying a pattern of electrostatic charges 21 to the nonconductive layer above at least one of the recording tracks 26 to write track-position-denoting servo information in overlying relation to magnetic data. The pattern may be applied by electrostatic charges selectively of negative or positive polarity that are imprinted while the medium is in a mold or advanced over an electro-photographic charge transfer drum, for thereby preprinting the pattern as a step in fabrication of the medium. <IMAGE>