| 摘要 |
PROBLEM TO BE SOLVED: To provide hierarchical structure of an array controller to provide an upgrade path simplified to facilitate large capacity storability via a single virtual device. SOLUTION: The hierarchical structure is compiled by providing a series of disk arrays in parallel via fiber channel connection to form a 'virtual disk'. And extremely large number of independent disc units are made to be seen as a single drive by using the hierarchical structure of a storage controller.
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