| 摘要 |
PURPOSE: To facilitate transfer operation and restore data efficiently at a high speed in the case of fault occurrence by providing plural storage means, a data bus, and a selecting means having a function for parity arithmetic operation. CONSTITUTION: Two channels of 4-channel crossbar switches 11a and 11b having an exclusive OR operation function are connected to data buses DDO and DD1 as common buses. Other two channels of the crossbar switch 11a as the selecting means are connected to drives HDDO and HDD1. Other two channels of the crossbar switch 11b are connected to drives HDD2 and HDD3. Further, the crossbar switches 11a and 11b are controlled with an address signal and a control signal outputted from a data bus controller 13, and connections in optional combinations of drives and data buses are enabled. Thus, the selecting means itself is provided with the function for parity arithmetic operation. |
