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Inside Windows Storage: Server Storage Technologies for Windows® 2000, Windows® Server 2003, and Beyond by Dilip C. Naik

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7.8. Hierarchical Storage Management

Hierarchical Storage Management (HSM) is sometimes confused with backup products and backup auxiliary products that help keep track of a file's archival position on a tape, or even its archival condition. Although both HSM and backup do deal with moving files and data between a primary medium (typically disk) and a secondary medium (typically tape or optical media), there is a big difference. The difference is the degree of transparency that backup and HSM provide. With HSM, the file appears to be present still. In some cases the file may have special attributes to indicate that the access time may be higher. With backup products, the application does not see a previously backed-up and deleted file.

Another ...

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