Patent ID: 8139455

Claim:
An apparatus for recording data on a recordable information storage medium comprising a plurality of recording layers, each of the recording layers comprising a user data area, the apparatus comprising: a pickup to irradiate a beam onto the recordable information storage medium; a recording signal processor to receive a beam reflected from the recordable information storage medium through the pickup for signal processing; and a controller to control the pickup to record data in the user data area of a first recording layer closest to the pickup and the user data area of a second recording layer farther from the pickup so that a difference between a size of a recordable portion of the user data area of the first recording layer and a size of a recordable portion of the user data area of the second recording layer is substantially equal to a number of tracks of the first recording layer through which the beam irradiated from the pickup passes to record data on the second recording layer; wherein each of the first recording layer and the second recording layer further comprises a first area located on an inner circumference of, the user data area, and a second area located on an outer circumference of the user data area; the size of the first area of the first recording layer is smaller than the size of the first area of the second recording layer; the size of the second area of the first recording layer is smaller than the size of the second area of the second recording layer; the first area on the inner circumference of the user data area is the only region between the inner circumference of the user data area of each of the.first recording layer and the second recording layer and an inner periphery of each of the first recording layer and the second recording layer; the second area on the outer circumference of the user data area is the only region between the outer circumference of the user data area of each of the first recording layer and the second recording layer and an outer periphery of each of the first recording layer and the second recording layer; the first area on the inner circumference of the user data area of the first recording layer closest to the pickup is a lead-in area.