Hierarchical Storage Management (HSM) is another feature in Windows Server 2003 made possible by reparse points. HSM enables some or all of a file to be stored remotely, and reparse points mark these files accordingly. The reparse point data stores the location of the remote data and allows NTFS to retrieve the data when needed. HSM works in conjunction with Remote Storage Services (RSS) and Removable Storage to enable files to be archived to tape or disk and automatically restored when requested by a user or process.
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