| 摘要 |
<P>PROBLEM TO BE SOLVED: To rapidly detect duplicated data concerning a storage controller by narrowing down the target for data comparison by comparing hash codes beforehand. Ž<P>SOLUTION: A hash value setting unit 7 sets a hash code in data received from a host 3. Hash code-attached data is stored in a logical volume 2A. A microprocessor unit 4 compares the hash codes for each comparison-targeted data. When hash codes match with one another, a data comparator 6 compares the target data, and determines whether or not the data is duplicated data. When duplicated data is detected, the microprocessor unit 4 removes the duplicated data. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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