Information recording device and data erasing method

An information recording device capable of erasing data recorded on a write-once optical disc, comprising:

• a receiver that receives an erase command in which an erase start position and a size of data to be erased are designated;
• an optical head that forms a recording mark on the optical disc;
• and
• a controller that controls formation of the recording mark on the optical disc,
• wherein, when receiving the erase command, the controller erases data of an erased area by overwriting data in an information area, to corrupt the data in the information area, using an erasing pattern, the information area including information necessary for data reproduction, and the erased area being specified by the erase start position and the size of the data to be erased on the optical disc;
• and
• wherein the data in the information area is arranged as partial data in a series of data arranged in a direction of internal parity of error correction so that correction is disabled in both of a correction processing by the internal parity of the error correction and a correction processing by external parity of the error correction when the data in the information area is overwritten using the erasing pattern.