A backup is a copy of data taken and stored elsewhere so that it may be used to restore the original after a data loss event. Backups can be used to recover data after its loss from data deletion or corruption, or to recover data from an earlier time. Backups provide a simple form of disaster recovery.


Replicating a ZFS dataset to another host.
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High Availability, RAID10, and 3-2-1 Backups with FreeBSD.
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A Minimal Backup Script
PUB 23MAY2021 1934Z