| 摘要 |
A hierarchical storage management apparatus manages data access to a plurality of hierarchical storage devices that have different performances. The hierarchical storage management apparatus includes the following elements: an access history recorder that records an access history of a data file stored in one of the plurality of hierarchical storage devices, the access history being recorded when the data file is accessed and including information about a hierarchical level in which the accessed data file is stored; and an image data generator that generates image data that shows an access status using information about one or more specified arbitrary hierarchical levels, each piece of the information being extracted from the access history.
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