Magnetic recording apparatus and magnetic recording and...

Details Magnetic recording apparatus and magnetic recording and... Magnetic recording apparatus and magnetic recording and...

2006-09-27

2010-06-29

Mercedes, Dismery E (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S031000, C360S039000, C369S047520, C369S275400

Reexamination Certificate

active

07746587

ABSTRACT:
In a magnetic recording apparatus, a magnetic recording medium has a RAM area on which rewritable information can be recorded. The magnetic recording medium also has a ROM area having a pattern area in which first-type segment sequence of magnetically rewritable magnetic segments and magnetically non-rewritable nonmagnetic segments is fixedly recorded as first-type modulation information. Predetermined segments in the first-type segment sequence are magnetized and changed to magnetized segments. A segment sequence of first and second segments magnetized in one and opposite directions is used to magnetically record second-type modulation information in the pattern area.

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