Method and apparatus for recording and reproducing information on and from disk

A method of recording and reproducing information on and from a disk ECC-block by ECC-block, every ECC block being composed of plural sectors, the method comprising the steps of:

• generating a recording command for a specified ECC block on the disk, the recording command containing information of a recording position on the disk and information of a recording size, the specified ECC block having sectors designated by the recording command and sectors undesignated by the recording command;
• writing the information of the recording position and the information of the recording size into a first nonvolatile memory;
• calculating the undesignated sectors among sectors in the specified ECC block;
• reproducing existing data from the calculated undesignated sectors in the specified ECC block on the disk;
• writing the reproduced existing data into a second nonvolatile memory;
• recording record data on the designated sectors in the specified ECC block on the disk in response to the recording command;
• writing the record data into a third nonvolatile memory;
• and
• in cases where power supply is turned on after interruption of power supply terminates, combining the existing data in the second nonvolatile memory and the record data in the third nonvolatile memory into restored data and recording the restored data on a whole of the specified ECC block on the disk in response to the information of the recording position and the information of the recording size in the first nonvolatile memory.

A method of recording and reproducing information on and from a disk ECC-block by ECC-block, comprising the steps of:

• recording disk identification information on a specified position on a disk;
• writing the disk identification information and information of the specified position into a nonvolatile memory;
• in cases where power supply is turned on after interruption of power supply terminates, reproducing information from a position on a disk which corresponds to the specified position represented by the information in the nonvolatile memory;
• deciding whether or not the reproduced information and the disk identification information in the nonvolatile memory are equal to each other;
• and
• when it is decided that the reproduced information and the disk identification information in the nonvolatile memory are equal to each other, updating a wrong ECC block on the disk into a normal ECC block, the wrong ECC block being caused by the interruption of power supply during data recording on the disk.

An apparatus for recording and reproducing information on and from a disk ECC-block by ECC-block, every ECC block being composed of plural sectors, the apparatus comprising:

• means for generating a recording command containing information of a recording position on the disk;
• a nonvolatile memory;
• means for storing the information of the recording position into the nonvolatile memory;
• means for recording data on the disk in response to the recording command;
• means for, in cases where power supply is turned on after interruption of power supply terminates, detecting a specified ECC block from the information stored in the nonvolatile memory, the specified ECC block being adversely affected by the interruption of power supply during the recording of data on the disk;
• means for generating one of a reproducing command and a verify command for at least one sector of the specified ECC block;
• means for reproducing data from the specified ECC block on the disk in response to the one of the reproducing command and the verify command;
• means for deciding whether or not the reproduction of data from the specified ECC block succeeds or fails;
• and
• means for, in cases where it is decided that the reproduction of data from the specified ECC block fails, recording data on a whole of the specified ECC block to convert the specified ECC block into a normal ECC block.

An apparatus for recording and reproducing information on and from a disk ECC-block by ECC-block, every ECC block being composed of plural sectors, the apparatus comprising:

• means for generating a recording command for a specified ECC block on the disk, the recording command containing information of a recording position on the disk and information of a recording size, the specified ECC block having sectors designated by the recording command and sectors undesignated by the recording command;
• a first nonvolatile memory;
• means for writing the information of the recording position and the information of the recording size into the first nonvolatile memory;
• means for calculating the undesignated sectors among sectors in the specified ECC block;
• means for reproducing existing data from the calculated undesignated sectors in the specified ECC block on the disk;
• a second nonvolatile memory;
• means for writing the reproduced existing data into the second nonvolatile memory;
• means for recording record data on the designated sectors in the specified ECC block on the disk in response to the recording command;
• a third nonvolatile memory;
• means for writing the record data into the third nonvolatile memory;
• and
• means for, in cases where power supply is turned on after interruption of power supply terminates, combining the existing data in the second nonvolatile memory and the record data in the third nonvolatile memory into restored data and recording the restored data on a whole of the specified ECC block on the disk in response to the information of the recording position and the information of the recording size in the first nonvolatile memory.

An apparatus for recording and reproducing information on and from a disk ECC-block by ECC-block, comprising:

• means for recording disk identification information on a specified position on a disk;
• a nonvolatile memory;
• means for writing the disk identification information and information of the specified position into the nonvolatile memory;
• means for, in cases where power supply is turned on after interruption of power supply terminates, reproducing information from a position on a disk which corresponds to the specified position represented by the information in the nonvolatile memory;
• means for deciding whether or not the reproduced information and the disk identification information in the nonvolatile memory are equal to each other;
• and
• means for, when it is decided that the reproduced information and the disk identification information in the nonvolatile memory are equal to each other, updating a wrong ECC block on the disk into a normal ECC block, the wrong ECC block being caused by the interruption of power supply during data recording on the disk.