| 摘要 |
PROBLEM TO BE SOLVED: To prevent the data breakdown of a disk by error-detecting the write transfer of correct data to any erroneous disk device caused by the failure of a bus or the internal failure of a disk array control part. SOLUTION: This disk device 20 which has received transfer data from a disk array control part 10 performs the calculation of a data assurance code by including not only the transfer data but also its own unique ID 25. When data transfer to a correct disk device 20 is executed, ID used for generating the data assurance code by the disk array control part 10 is matched with the unique ID 25 of the disk device 20 which executes the check of the data assurance code, and write data are written to the disk. When the transfer to the erroneous disk device 20 is executed, and the check error of the data assurance code is detected, the write data are not written to the disk but discarded so that the data writing to the erroneous disk device can be prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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