As the computational speed of the central processing unit (CPU) is increased, the demand for high data rate memory is emphasized. Although many kinds of large capacity optical memory like one with near field optics are being studied, the data transfer rate of them will be still too low for it's disk capacity. Therefore, the optical cluster drive is realistic solution. because it is applicable to all kinds optical memory1'2 Therefore, it can be promising candidates for network server in the future. The precise analysis of the data integrity of the optical disk cluster drive has not be presented This paper describes the analysis on data integrity and reliability of it.