Patent ID: 7301878
Filing Date: 2007-11-27
Classification: G11B

Abstract:
1. An information storage medium having a spirally or coaxially formed track or tracks on which given areas are sequentially arranged, said given areas containing a first area configured to store record information, a second area configured not to store the record information, a third area configured to store a specific pattern, a fourth area configured to store next record information, a fifth area configured not to store the record information nor the next record information, and a sixth area configured to store the specific pattern, wherein the first, second, and third areas constitute a preceding unit, and the fourth, fifth, and sixth areas constitute a succeeding unit which is arranged just next to the preceding unit, the second area is arranged just next to the first area, the third area is arranged just next to the second area, the fourth area is arranged just next to the third area, the fifth area is arranged just next to the fourth area, and the sixth area is arranged just next to the fifth area, and the specific pattern of the third area and the next information of the fourth area are stored in continuous units of said preceding and succeeding units.