Optical recording and reproducing apparatus for controlling a laser driver current according to test data on the disc

An optical information recording method of writing data into an optical recording medium connected to a host device, comprising:

• (a) receiving data write command from said host device;
• (b) wring data into user data areas of data areas of said optical recording medium by an optical information recording head in accordance with said write command;
• (c) determining, if there is a defective block in data writing, the pre-write testing of test data inclusive of two continuous signals in accordance with the number of occurrences of a defective block in data writing;
• (d) supplying different laser driving currents for plural ones of pre-write testing areas in said data areas of said optical recording medium to said optical information recording head to perform the pre-write testing of said test data;
• (e) reproducing the respective pre-write testing data to determine a difference in an average voltage level between the two continuous signals of each test data;
• (f) setting the laser driving current supplied for the pre-write testing of the test data indicative of the smallest value of said difference, as a laser driving current which is to be supplied to said optical information recording head when the recording of user data is to be performed;
• (g) performing the positioning of said optical information recording head for said user data area to write said data again by said laser driving current;
• (h) writing said data into another user data area by said laser driving current if there is a defective block in data writing and completing the writing of said data into an optional block of said user area if there is no defective block in data writing;
• and
• (i) setting a time interval until the next pre-write testing of test data is executed in accordance with a difference between the laser driving current set at the time of the previous pre-write testing and the laser driving current set at the time of the present pre-write testing.

An optical information recording apparatus for performing the pre-write testing of test data for an optical recording medium connected to a host device, comprising:

• an optical information recording control device for receiving at least a command for writing of data from said host device, and an optical information recording medium controlled by said optical information recording controller in accordance with said command for writing of data so that said data is stored into said optical information recording medium,
• wherein said optical information recording controller includes:
• first means for issuing an instruction for pre-write testing of test data inclusive of two predetermined continuous signals independently from a write command from said host device;
• first means for indicating the pre-write testing of said test data by supplying different laser driving currents for plural ones of pre-write testing areas of said optical recording medium to an optical information recording head in accordance with said pre-write testing instruction;
• third means for reproducing the respective pre-write test data to determine a difference in an average voltage level between the two continuous signals of each test data;
• fourth means for indicating the supply of the laser driving current supplied for the pre-write testing of the test data indicative of the smallest value of said difference when the recording of user data is to be performed;
• and
• fifth means for setting a time interval until the next pre-write testing of test data is executed in accordance with a difference between the laser driving current set at the time of the previous pre-write testing and the laser driving current set at the time of the present pre-write testing.