Abstract: A recording device for recording data on a rewritable optical record carrier (11). The device comprises recording means (21, 22, 25) for forming marks on the record carrier during recording operations by irradiating the record carrier with a radiation beam (24), the marks representing the data. Further, the device comprises control means (20) for controlling the recording operations and beam control means (31) for controlling a write power of the radiation beam with reference to an optimum write power by changing the write power within a predetermined write power range around the optimum write power for subsequent write cycles, each of the write cycles comprising at least one recording operation. Variation of the write power improves the overwrite quality, in particular, in the management area, such as the file system area.

Abstract: A method for reducing overall power calibration time and increasing the number of power calibrations that can be done on an optical record carrier includes performing a first set of power calibration procedures on an optical record carrier at a first recording speed in a first set of calibration areas, and performing a further set of power calibration procedures on the optical record carrier at a recording speed different from the first recording speed. The further set of power calibration procedures partly uses information from the first set of calibration areas.

Abstract: A method comprising performing a first set of power calibration procedures on an optical record carrier at a first recording speed in a first set of calibration areas and performing a further set of power calibration procedures on the optical record carrier at a recording speed different from the first recording speed, wherein the further set of power calibration procedures partly uses information from the first set of calibration areas is disclosed. The technique is useful in scenarios where the recording is required to be done with more than one speed on the same optical record carrier. The technique reduces the overall power calibration time and increases the number of power calibrations that can be done on the optical record carrier. The technique is useful for data, audio and video recorders.

Abstract: A recording device for recording data on a rewritable optical record carrier (11). The device comprises recording means (21, 22, 25) for forming marks on the record carrier during recording operations by irradiating the record carrier with a radiation beam (24), the marks representing the data. Further, the device comprises control means (20) for controlling the recording operations and beam control means (31) for controlling a write power of the radiation beam with reference to an optimum write power by changing the write power within a predetermined write power range around the optimum write power for subsequent write cycles, each of the write cycles comprising at least one recording operation. Variation of the write power improves the overwrite quality, in particular, in the management area, such as the file system area.

Abstract: A recording device writes and reads marks that represent information. A radiation source (22) is controlled for writing the marks according to a write strategy on a record carrier (11) arranged according to a predefined recording format. The recording format defines pre-recorded disc information including a disc type identifier and disc recording parameters. The device has a control unit (20) for setting the write strategy, a strategy table (31) containing strategy data sets, each strategy data set containing parameters defining a respective, preset write strategy, and a lookup table (32) for containing disc type entries, each disc type entry being retrievable based on a disc type identifier and indicating one of the strategy data sets.