Magnetic recording apparatus and magnetic recording and reproducing apparatus
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United States of America Patent
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Jun 29, 2010
Grant Date -
Sep 6, 2007
app pub date -
Sep 27, 2006
filing date -
Mar 6, 2006
priority date (Note) -
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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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