A copy-on-write shadow copy is a mapping of all the data blocks at a designated point in time. As the original data set changes, the pointers to data that has changed then replicate the original data, enabling the point-in-time restore. Because of the way it works, copy-on-write shadow copies typically only take up a small percentage of the disk space of the original data set.
VSS coordinates with the application Writers, the Agent for Open Files, and Arcserve Backup to create shadow copies of applications and their files and the file system.
Note: Copy-on-write shadow copy data block map is created on (and must stay within), a particular server.
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