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

摘要

Information is recorded on and reproduced from a disk ECC-block by ECC-block. Every ECC block is composed of plural sectors. A recording command is generated which contains information of a recording position on the disk. The information of the recording position is stored into a nonvolatile memory. Data is recorded on the disk in response to the recording command. In cases where power supply is turned on after interruption of power supply terminates, a specified ECC block is detected from the information stored in the nonvolatile memory. The specified ECC block is adversely affected by the interruption of power supply during the recording of data on the disk. One of a reproducing command and a verify command is generated for at least one sector of the specified ECC block. Data is reproduced from the specified ECC block on the disk in response to the one of the reproducing command and the verify command. A decision is made as to whether or not the reproduction of data from the specified ECC block succeeds or fails. In cases where it is decided that the reproduction of data from the specified ECC block fails, data is recorded on a whole of the specified ECC block to convert the specified ECC block into a normal ECC block.