OPTICAL SERVO SYSTEM MAGNETIC RECORDING MEDIUM, ITS CONTROL DATA RECORDING METHOD, OPTICAL SERVO SYSTEM MAGNETIC RECORDER AND ITS HEAD CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To obtain a stable ID output by forming ID information in a land part on a magnetic recording medium with a pit and optically detecting the ID data. ;SOLUTION: In the optical servo system magnetic recording medium 2 forming a groove on the magnetic recording medium 2 and making a magnetic head 7 optically trackable by cracking this groove 3, a recessed pit for optically detecting an ID field 4 is formed on a track recording the data, and read/write control for the magnetic recording medium is made possible by using this pit.;COPYRIGHT: (C)1999,JPO