The 3-2-1-1-0 Backup Strategy
A straightforward approach to keeping your data safe from accidents, disasters, and cyberattacks. Here is how the 3-2-1-1-0 rule works in simple terms, and how remote-backups.com supports your backup setup.
What is the 3-2-1-1-0 Rule?
The 3-2-1-1-0 backup strategy builds on the classic 3-2-1 rule and adds extra safety for modern threats like ransomware and data corruption.
3
Copies
of your data
2
Different
media types
1
Offsite
location
1
Offline
or immutable
0
Verification
errors
Breaking Down Each Component
3 Copies of Your Data
You should keep three copies: your working data and two backups. This guards against hardware failure, deletion, or loss.
- Original data on your main system
- Backup copy (usually local for quick access)
- Second backup (commonly offsite to protect from local disasters)
2 Different Media Types
Back up to two kinds of storage media to prevent loss caused by problems in one type of technology.
- Hard drives or SSDs
- Cloud or remote storage, backup servers
- NAS devices
- Tape storage
1 Offsite Copy
Keeping a backup at a remote location protects against fire, flooding, or theft in your office or data center.
1 Offline or Immutable Copy
This step addresses cyber threats: an offline or immutable backup can’t be changed or encrypted by malware.
- Storage that’s physically disconnected
- Immutable setups that block changes or deletion
- Write-once, read-many (WORM) systems
- Tape ejected for safekeeping
0 Verification Errors
Backups need regular verification: checking restores and integrity so you aren’t caught off guard by corrupted or missing data.
- Automated integrity checks
- Restore test runs
- Monitoring for backup issues
- Clear documentation for recovery
How remote-backups.com Completes Your 3-2-1-1-0 Setup
remote-backups.com is built for the single most important offsite element in your backup strategy. Your backups are stored in a secure remote location that’s easy to manage and quick to access.
Integration Examples:
- Proxmox Backup Server: Connect directly for VM/container backups
- Borg Backup: Encrypted, deduplicated backups
- rsync: For file-based backups
- Custom setups: SSH access for any tool
Remote-backups.com: Features
- Hardware owned: No public cloud – full control
- German data protection: Strict privacy, EU standards
- Transparent pricing: €10/TB per month, 100GB free tier
- Reliability: Enterprise hardware, certified datacenters
- Simple setup: SSH access, compatible with popular backup tools
Example 3-2-1-1-0 Setup
- Local backup (NAS or external drive)
- Offsite backup on remote-backups.com
- Offline copy (removable media)
- Verification of restores and data integrity
- Different media: Local plus remote systems
Implementation Best Practices
Backup Frequency
- Daily backups for important data
- Weekly for data with lower change rates
- Real-time for business-critical systems
- Check RPO needs for your case
Retention Policies
- Save daily backups for a month
- Weekly backups for a quarter
- Monthly for a year
- Keep yearly for long-term archives
Security
- Encrypt during transfer and storage
- Strong authentication
- Access controls and logging
- Regular security reviews
Testing & Verification
- Monthly restore tests for key data
- Quarterly full-system recovery tests
- Written recovery plans
- Staff training on recovery steps
Common Backup Mistakes to Avoid
Avoid these errors:
- Untested backups: Always run restore tests regularly
- Single location: Don’t rely on just local storage
- No offline backup: Online-only backups are risky
- Irregular schedule: Stick to regular backup routines
- Skipping verification: Discovering backup errors too late
- Same media: Mix different storage technologies
Explore Other Backup Strategies
The 3-2-1-1-0 approach offers strong protection, but you have other options depending on your needs:
- 3-2-1 backup strategy for a simpler, traditional approach that covers the basics
- 4-3-2 strategy for maximum geographic resilience and faster disaster recovery
Choose the strategy that best matches your risk tolerance and available resources.
Ready to Set Up Your 3-2-1-1-0 Backup?
Get started with remote-backups.com for robust offsite protection. Flexible plans, fair pricing, and support you need.