Without redundancy, a single point of failure can take your entire service offline:
- Hardware failure: Disk failures, RAM errors, or PSU issues can happen anytime
- DDoS attacks: Even with protection, severe attacks may degrade performance
- Maintenance: OS updates, panel upgrades, and migrations require downtime
- Network issues: Datacenter outages, routing problems, or upstream provider issues
A backup server in a different location eliminates all single points of failure.