| 摘要 |
PURPOSE:To improve the working performance and to reduce the fault occurring rate in the title system by storing a copy executing address, its operating flag, and a process wait flag in a main storage. CONSTITUTION:The copy processing current addresses TTR of duplex files 7 and 8 are recorded together with a flag FLAG1 showing the execution of the copy processing, and a flag FLAG2 which shows a fact that a duplex file input/output control means DFCF 2 waits for the end of the copy processing related to the relevant current address when the DFCF 2 and a copy means 3 process the same address. Then both the DFCF 2 and the means 3 can be actuated at one time. Therefore a duplex file having a fault can be restored without stopping the on-line operation in a 24-hour on-line system. |
