Patent ID: 7382710

Claim:
A recording method for recording information on an information storage medium comprising at least one pair of neighboring tracks, on which sectors are provided, formed on the information storage medium having a center of rotation, wherein one of said neighboring tracks is configured to record information of a combination of first group recording units and a first non-data portion which is located between the first group recording units, an other of said neighboring tracks is configured to record information of a combination of second group recording units and a second non-data portion which is located between the second group recording units, an angular position of the first non-data portion with respect the center of rotation is different from an angular position of the second non-data portion with respect to the center of rotation, a plurality of ECC blocks are formed on any of neighboring tracks such that one of the first and second non-data portions is formed after an end of one of the ECC blocks and before a start of a next one of the ECC blocks, one of the ECC blocks is formed as a combination of two small ECC blocks, one of the small ECC blocks includes outer-code parity data PO, and a set of two of the sectors is provided with the outer-code parity data PO, said method comprising: recording digital information on one of the tracks using the small ECC blocks, and recording digital information on the other of the tracks using the small ECC blocks.