During a File Copy, each backed up file is made up of a collection of blocks that define the particular file. A catalog file is created for every version of the backed up file, along with the individual blocks that were used for these files. When you need to restore a particular file, you can browse and select the file you want to restore and the file copy versions you want to restore from. Then Arcserve UDP collects the version of the blocks that were used for the file copy of the specified file, which reassembles and restores the file.
The following flow diagram shows the process of how Arcserve UDP restores a specific file.
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