| 摘要 |
PURPOSE:To enhance a reliability of a memory information by copying an information after a correction at another memory position and reading the copied information when a correction enable error becomes a correction disable error. CONSTITUTION:When a magnetic disk control device 1 receives a reading request of an information from a host device 2, it reads a data from a magnetic disk device 3 and decides whether there is a correction enable error in the read data or not. When there is no error, the read data is transferred to the host device 2, finishing the processing. When there is a correction enable error, the error is corrected in the magnetic disk control device 1, and the data after the correction is transferred to the host device 2 and written in another memory position separated from the memory position reading the data of the magnetic disk device 3, finishing the processing. Thereby, when a correction enable error shifts to a correction disable error, the reading of the information can be protected. |
