| 摘要 |
PURPOSE: A duplexing device using a hard disk is provided to embody a duplexing using a cheap and high capacity hard disk capable of being bought easily. CONSTITUTION: In a duplexing device having a master(30) and a slave(40), CPU units(31,41) are provided for performing a main calculation of a board. An auxiliary devices(32,42) are controlled by the CPU units(31,41) and perform a parking of a hard disk when the board is initialized. Hard disk units(33,43) are connected to the CPU units(31,41) and store data necessary for a duplexing. Logic units(34,44) create a control signal for the duplexing of the hard disk units(33,43). The auxiliary devices(32,42) include a switch unit which is controlled by the CPU units(31,41) for securing a predetermined time in a trial of a board dismounting in hardware and a parking operation unit for parking the hard disk units(33,43) for the dismounting trial time when a duplexing control signal is inputted by the logic units(34,44).
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