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Your administrator determines how many backup versions Tivoli Storage Manager maintains for each file on your workstation. Frequently, the administrator allows more than one version of each file. Having multiple versions of a file allows you to restore older versions in case the most recent backup is damaged.
Tivoli Storage Manager considers the most recent backup version to be the active version. Any other backup version is considered an inactive version.
Every time you back up your files, the new backup version becomes the active version, and the previous active backup version becomes an inactive version. When the maximum number of inactive versions is reached, Tivoli Storage Manager deletes the oldest inactive version.
If you want to restore an inactive backup version, you need to display both active and inactive versions, by clicking on the View menu> Show active/inactive files item. To display only the active versions (the default), click on the View menu> Show active/inactive files item again.