Magnetic disk device

Abstract

Abstract PURPOSE:To realize the easy control for the addition and replacement of information which is recorded on an optical disk, by forming a magnetic recording surface coaxially to the optical disk and reading the information recorded on the recording surface by means of an opposing magnetic head. CONSTITUTION:A magnetic recording surface 12 is formed at the inner circumference part of an optical disk 11, and a magnetic head 13 is installed opposedly to the surface 12. The track No. or the sector No. is erased and replaced on the surface 12 every time when the information is replaced and written on an optical recording surface 16. As a result, the information recorded on the surface 16 can be retrieved by reading the information recorded on the surface 12 with the head 13. Thus the control can be carried out in an easy and quick way for the addition and replacement of the information recorded on the disk 11.

Inventors

• 👤 Minoru Fujino

Bibliographic Details