Results of investigation of operation mode of programs for film information processing on the CDC-6500 computer

The experience with mass processing of results of measuring photographs from a heavy liquid bubble chambers on the CDC-6500 computer by a special system of programs indicates that at reading data from the input magnetic tape and recording results on the output magnetic tape there is a significant waste of of computer time owing to failures in tape recorder operation because of bad quality of magnetic tapes. Moreover, due to big expence of peripherial processor time required for operation with magnetic tapes the efficiency of central processors applying dereases. Different modes of operation of programs for film information processing with different types of devices for reading an input data and those for recording results are investigated. It is shown that the most reasonable operation mode for programs of film information processing on the CDC-6500 computer providing their reliable operation and effective use of a computer is that when information from magnetic tapes is copied on a magnetic disk and all further operations are made with files on this disk. On a final stage of information processing the results necessary to keep are copied again from a disk onto a magnetic tape