Backups
Backup copies are required when:
- Data is (accidentally) deleted
- The main storage medium fails
- As a corporate data repository
To optimise the backup process we can distinguish the following
types of backup:
- Full backup (contains a complete copy of the data - also called level-0)
- Incremental backup (often multiple levels - also called level-n)
Every level contains differences from previous level.
Ensure that:
- Backup copies are stored in a different, but safe location (off-site)
- Periodically the ability to recover a single file or a complete disk is verified