| 摘要 |
PURPOSE:To provide a storage device securing data when repeating obstacles occur in the restoration processing of an obstacle data block and realizing the minimization of an influence to a normal input/output processing. CONSTITUTION:A nonvolatile memory 270 is provided on a part of a disk array controller 200 lying between a CPU and a disk array device 300 and when the obstacle occurs in a data block constituting of logic data at a writing time, an updating block corresponding to an obstacle data block is stored in the nonvolatile memory 270 and other normal data block are written in the disk array device 300. Further, when the obstacle data block occurs at a reading time, other normal data blocks and restored data blocks restored based on the normal data blocks are transferred to the CPU and the restored data blocks are stored in the nonvolatile memory 270. |
