| 摘要 |
PURPOSE:To provide the diskless duplicate controller with high reliability by applying transfer processing between controllers for data equivalence between both the controllers at a high speed without increasing a load on a CPU board and a system bus. CONSTITUTION:The system is provided with two sets of diskless controllers 4, 5 connecting to a 1st transmission line 3 and receiving/sending data via the transmission line 3, and the diskless controller 4(5) is made up of a system bus 14(24), a transmission interface 13(23) connecting a 1st transmission line 3 and the system buses 14, 24, a CPU board 10(20), an IC card controller 41(51) storing control arithmetic operation data, and a 2nd transmission line 43 connecting the IC card controllers 41, 51. The controller 4 is operated as an active system and the other controller 5 is used for a standby system and data are made equivalent at all times through data transmission via the 2nd transmission line 43 between the controllers of the active system and the standby system. |
