| 摘要 |
PURPOSE: To establish the completion and maintenance of a data changing operation to a redundant array data storage system, and to establish the maintenance of redundancy in the system. CONSTITUTION: A check point is applied to an operation. After the completion of a buffer provided at a reliability host processing formed of main and second CPU 1a and 1b, written data in host CPU adapters 2a and 2b are blocked by a buffer 11 before the data are transmitted to array controllers 3a and 3b so that the completion of a data changing operation can not be disturbed by the fault of the CPU 1a and 1b. A reliability array processing is formed of the main and second array controllers 3a and 3b. A storage device 4 provided with the array controllers 3a and 3b and a storage array is backed up by a power battery. All data changing operation command information is stored by the non-volatile memory of an array controller for data records which are not sufficiently written in the storage devise 4 in order to prepare for the following retry. |
