| 摘要 |
PURPOSE:To improve the processing efficiency of the whole system by storing a fault when the fault is detected by access from one access unit in case that one memory unit is shared among plural access units, and then by inhibiting access to a fault area according to the memory contents. CONSTITUTION:Processors 5 and 6 are provided with internal-circumference reading circuit 9 and outer-circumference reading circuit 10 for magnetic disk device 8 to attain access to device 8. Further, processor 5 is provided with error detecting circuit 20, AND gate 13 and FFs 11 and 12. Once an error is detected by circuit 20, the operation of circuit 9 is stopped via line 15 and then circuit 10 is actuated to set FF11. Further, as a reading of the outer circumference area is normally finished by circuit 10, circuit 20 sets FF12. Next, when processor 6 is put into operation, a reading of the inner circumference by circuit 9 of processor 6 is stopped with the output of gate 13 and a reading of the outer circumference is taken by circuit 10, improving the processing efficiency of the system. |
