A storage media is disclosed and comprises a storage body and a readable indelible mark formed in the body such that portions thereof are indelibly altered. Each pixel comprises a red sub-pixel, a green sub-pixel, a blue sub-pixel, and an auxiliary sub-pixel with a transflective area. The Rfdet signal is a signal having H level when a laser spot falls in a data-recorded area on an optical disk, and having L level when in a non-recorded area.