TopicBackup & PRA →
Simple definition
A backup that cannot be modified or deleted for a defined period.
Technical definition
Immutability uses software, object or storage locking mechanisms to prevent even some administrative accounts from altering protected points.
What is it used for ?
Resist accidental removals and attacks ransomware.
Practical example
A repository can lock backups for 30 days, even if a management account is compromised.
Common issues
- Period of immutability too short
- Saturated storage impossible to purge before maturity
- Poorly protected control account
Related terms
Ransomware · Rule 3.2-1 · Air gap
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.