backup
Sign in to saveIn information technology, a backup, or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is "back up", whereas the noun and adjective form is "backup". 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 IT disaster recovery; however not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer c
AI overview
A backup is a copy of computer data that's stored separately so it can be restored if the original data is lost, deleted, or corrupted. Backups are an important way to protect against data loss and help recover information from an earlier point in time if something goes wrong.
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Article
40 sectionsContents
- Storage
- 3-2-1 Backup Rule
- Backup methods
- Unstructured
- Full only/System imaging
- Incremental
- Near-CDP{{anchor|Continuous_data_protection}}
- Reverse incremental
- Differential
- Storage media
- Magnetic tape
- Hard disk
- Optical storage
- Solid-state drive
- Remote backup service
- Management
- Online
- Near-line
- Off-line
- Off-site data protection
- Backup site
- Selection and extraction of data
- Files
- Filesystems
- Live data
- Metadata
- Manipulation of data and dataset optimization
- Automated data grooming
- Compression
- Deduplication
- Duplication
- Encryption
- Multiplexing
- Refactoring
- Staging
- Objectives
- See also
- Notes
- References
- External links
In information technology, a backup, or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is "back up", whereas the noun and adjective form is "backup". 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 IT disaster recovery; however not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer cluster, active directory server, or database server.
A backup system contains at least one copy of all data considered worth saving. The data storage requirements can be large. An information repository model may be used to provide structure to this storage. There are different types of data storage devices used for copying backups of data that is already in secondary storage onto archive files. There are also different ways these devices can be arranged to provide geographic dispersion, data security, and portability.