| 摘要 |
PURPOSE:To execute a secure transmission without deleting transaction data by storing data when the transmission of the transaction data is not normally executed and reading and transmitting data from a memory means when the data transmission cannot be executed. CONSTITUTION:When a fault exists at the communicating line between a cluster controller 1 and a storing controller 4, it is discriminated that a transmission error is present. In such a case, a CPU 10 stores the transaction data to the non-transmitting transaction data memory area 122 of a RAM 12 and adds the number of the counting of a non-transmitting transaction data counter 121 by 1 only. Thereafter, when the data transmission is executed from a host computer 3, the transaction is established, the CPU 10 discriminates that the transmission error is absent, the number of the counting of the counter 121 is checked. When the number of the counting is not 0, the non-transmitting transaction data are read from the area 122 and transmitted to a storing controller 4. The reading is executed by the last-in first-out system. |
