Patent ID: 7986598

Claim:
A recording method for recording a user data stream on a dual layer recordable disk having a first layer and a second layer, the method comprising an act of performing an Optimum Power Control (OPC) procedure for determining an actual optimum writing power, said Optimum Power Control procedure being performed in variably located OPC-areas on the disk that are variably located on the first layer and the second layer, at least one of the variably located OPC-areas is positioned on the first or second layer and located relatively close to a radius where the user data stream switches from the first layer to the second layer, wherein a first user data area extends from a lead-in zone of the first layer to a radius R 1 of the of the first layer, and a first middle zone and a second user data area extends beyond radius R 1 of the first layer, and a third user data area extends from a lead out zone to a second radius R 2 in the second layer, and a second middle zone and a fourth user data area extends beyond radius R 2 , wherein approximately half of the user data stream is written to each of the first and third user data areas, and substantially none of the user data stream is written to the second and fourth user data areas, and at least one OPC-area is in at least one of the first middle zone and the second middle zone.