Write/read apparatus to control overwriting

A write/read method for writing and reading data on a disk-like rotating recording medium, comprising:

• generating unique addresses in relation to a write operation of data in a recording area of said recording medium;
• generating flags;
• adding the flags and the unique addresses to the data input via an external interface section for data input and writing the data in the recording area of said recording medium;
• determining the value of the flags of the data written in the recording area when the data is written in a certain recording area of said recording medium;
• and
• not writing the data in the recording area according to the value of the flags as a result of said determining and, thereafter, writing the data in the recording area according to consecutive unique addresses when the recording area where the flags permit the write operation is reached.

A write/read method for writing and reading data on a disk-like rotating recording medium, comprising:

• generating unique addresses in relation to a write operation of data in a recording area of said recording medium;
• writing a certain type of data input via an external interface section for data input in the recording area of said recording medium with the addition of flags to prohibit an overwrite operation and the unique addresses in a first recording mode;
• writing other type of data input via an external interface section for data input in the recording area of said recording medium with the addition of flags to permit the overwrite operation and the unique addresses in a second recording mode;
• determining the value of the flags of the data written in the recording area when the data is written in the recording area of said recording medium and, then, permitting the write operation in either the first or second recording mode when the overwrite operation is permitted;
• and
• determining the value of the flags of the data written in the recording area when the data is written in the recording area of said recording medium and, then, skipping the recording area when the overwrite operation is not permitted and, thereafter, writing the data according consecutive unique addresses in either the first or second mode when the recording area where the write operation is permitted is reached.