What is the difference between backup & disaster recovery?

Answer 1

The basic difference between Backup & disaster recovery solution is RTO & RPO.
Backup: In backup, the backup frequency defines the RPO & time to restore data defines the RTO.
disaster solution: in disaster solutions most of the organization will keep the real time data movement from source to Target so RPO is near zero & the RTO is just a network changing from source to Target. So there is small period of downtime of the production/

Backup is to have multiple copies with longer period.
Disaster recovery will give you business continuity without down time.

Answer 2

Backup need to restore to production site for use. Disaster recovery site will become production site when Primary/production site is not available.

Answer 3

Backup: Creating the copy of your data in secondary location to restore it back when any disaster happens at primary location.
Disaster Recovery: The process of restoring your data from a backup site/DR site at the time of disaster/data loss.