Patent ID: 7068462

Claim:
A magnetic recording apparatus comprising: a magnetic head for recording and reproducing information, perpendicular magnetic recording media having a servo area for storing servo pattern recordings and a user data area for storing user data recordings, and a signal processing means for processing servo information or user data read by said magnetic head, wherein said servo area has a burst block in which burst patterns for positioning said magnetic head are recorded and a gray code block in which track information is recorded with patterns of “1” and “0” representing the information indicated by two different perpendicular magnetization directions, and wherein said information “1” and said information “0” are recorded respectively with a “++−−” pattern and a combination of “+−” patterns, or said information “1” and said information “0” are recorded respectively with a “−−++” pattern and a combination of “−+” patterns when said two different perpendicular magnetization directions are expressed as “+” and “−”.