| 摘要 |
In an apparatus and method for data checking in a storage system such as a disk array system which includes a plurality of storage devices, the write data have error detecting codes for a host device thereof checked and stored in a register unit, the write data are divided, error detecting codes for storage devices are generated, and the write data are written in the storage devices are simultaneously transferred through paths used for the read data. The write data are combined into host data, error detecting codes for the host device are generated, and the generated codes are compared with the codes stored in the register unit so as to check whether they correspond to each other. Alternatively, the read data have error detecting codes for the storage devices thereof checked and stored in a register unit. In that case the read data are combined into host data to be transferred through the host device, the combined data is transferred through the paths used for the write data, the data are divided into storage device data, error detecting codes for storage devices are generated, and the generated codes are compared with the codes stored in the register unit so as to check whether they correspond to each other.
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