A method and apparatus for testing a dual layer DVD+R disk are disclosed. The disk includes a first recording area and a second recording area. First, read data distribution of the disk from the first recording area. Next, determine if the disk is blank, and if the disk is blank, format the disk and logically divide the disk into a number of sessions. Read detailed information of the sessions from the second recording area if the disk is not blank. Afterward, write writing data into a selected session to test the disk. Finally, close the selected session and write the detail information of the selected session into the second recording area.