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A backup or the process of backing up is making copies of data which may be used to restore the original after a data loss event. Backups have two distinct purposes. The primary purpose is to recover data after its loss, be it by data deletion or corruption. The secondary purpose of backups is to recover data from an earlier time, according to a user-defined data retention policy, typically configured within a backup application for how long copies of data are required.

Questions with the backup tag regards the process of, implementation and configuration of backing up.

http://en.wikipedia.org/wiki/Backup

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