the object of the present invention is to provide a test writing method for seeking the optimum write power correctly and in a short time under a high speed recording condition in a test writing method and an information recording device for recording information by forming different marks from the unrecorded part by injecting energy onto the recording medium . to achieve the above object , even number length marks and odd number length marks are separately test written in the 2t strategy to seek the respective optimum write power . due to the possibility of enhancing the precision of test writing , a good recording ability can be obtained .