Patent Number: 8,879,370

Title: Optical disk apparatus

Abstract: An optical disk apparatus which conducts overwriting of data on a rewritable optical disk or conducts write-once recording of data on a write-once optical disk includes a control unit for receiving a recording command which specifies a recording area and orders recording and receiving transfer data, and a collation unit for collating existing data on the optical disk with the transfer data. Upon reception of the recording command and the transfer data by the control unit, the existing data is collated with the transfer data by the collation unit, and overwrite recording of data in places where the transfer data is different from the existing data is conducted on the rewritable optical disk, or data in places where the transfer data is different from the existing data is recorded in an unrecorded area of the write-once optical disk.

Inventors: Kobayashi; Masayuki (Kuki, JP)

Assignee: Hitachi Consumer Electronics Co., Ltd.

International Classification: G11B 7/007 (20060101); G06F 17/00 (20060101); G06F 12/00 (20060101)

Expiration Date: 2019-11-04 0:00:00