What is Immutable Backup?
An immutable backup cannot be altered or deleted by anyone — including administrators and attackers — for a defined retention period. Because modern ransomware deliberately targets backups before encrypting production data, immutability has become the gold standard for backup protection.
Why Immutable Backup matters for Australian businesses
Data is one of your most valuable business assets, and losing it — whether through ransomware, hardware failure, or natural disaster — can be catastrophic. Understanding backup and disaster recovery concepts ensures you can make informed decisions about protecting your business and recovering quickly when things go wrong.
For small and medium businesses in particular, immutable backups can make a real difference in maintaining a secure, efficient, and resilient IT environment. Whether you are reviewing your current setup or planning improvements, understanding the role of immutable backups in your broader IT strategy will help you have more informed conversations with your IT provider and make better decisions for your business.
Related terms
Ransomware • 3-2-1 Backup Rule • Air-Gapped Backup
How All IT Services can help
At All IT Services, we help businesses across Sydney, Brisbane, Melbourne, and regional NSW implement and manage immutable backups as part of our comprehensive backup and disaster recovery services. If you have questions about how this fits into your IT strategy, contact our team for a no-obligation consultation.
Frequently Asked Questions
What is an immutable backup?
A backup written in a form that cannot be modified or deleted until its retention lock expires — by anyone, including compromised administrator accounts.
Why do immutable backups matter against ransomware?
Attackers routinely delete or encrypt accessible backups before triggering ransom demands; immutable copies are technically beyond their reach, preserving recovery.
How is immutability achieved?
Through object-lock storage in the cloud, purpose-built backup appliances, or service providers offering retention-locked vaults — configured so the lock cannot be lifted early.