3-2-1 Backup Rule
A backup rule recommending three copies of data, on two types of media, including one off-site.
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3-2-1-1-0 Backup Rule
An extension of the 3-2-1 rule recommending three copies, two media types, one offsite copy, one offline/immutable copy, and zero verified errors.
View →Air gap
A strong separation between a backup copy and the production system.
View →Application Item Restore
A backup or recovery mechanism used to protect data and meet recovery objectives.
View →Application-Aware Processing
Backup processing that coordinates the snapshot with the application to obtain a transactionally consistent state.
View →Application-Consistent Backup
A backup or recovery mechanism used to protect data and meet recovery objectives.
View →Backup
An independent copy of the data that allows it to be restored after a loss, error or attack.
View →Backup Catalog
A central index describing available backups, their contents, restore points, and locations.
View →Backup Chain
The ordered set of full and incremental/differential backups required to reconstruct a restore point.
View →Backup Copy
Backup Copy is a concept or mechanism used to backup to copy restoration points to a second independent location.
View →Backup Gateway
A backup or recovery mechanism used to protect data and meet recovery objectives.
View →Backup Health Check
A periodic check that rereads or recalculates backup data to detect corruption or inconsistencies before restore time.
View →Backup Immutability
A backup or recovery mechanism used to protect data and meet recovery objectives.
View →Backup Job
A configured backup-software task that defines what to protect, when, where, and under which policy.
View →Backup Metadata
The descriptive information of a backup: inventory, index, dates, objects, dependencies, checksums, or restore settings.
View →Backup Retention
The duration or number of backup points retained.
View →Backup Set
A coherent collection of backup data and restore points grouped for the same policy, source, or period.
View →Backup Validation
The process that confirms a backup meets defined consistency, integrity, and restorability criteria.
View →Backup Verification
An operation that checks the technical integrity of a backup file or restore point after creation.
View →Backup Window
The planned time window during which backups can run with acceptable production impact.
View →Bare-Metal Restore
A restoration that reconstructs a complete system on an empty or replaced machine.
View →Block-Level Backup
A backup that tracks and copies changed storage blocks instead of processing each file individually.
View →Capacity Tier
A backup or recovery mechanism used to protect data and meet recovery objectives.
View →Crash-Consistent Backup
A backup or recovery mechanism used to protect data and meet recovery objectives.
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