Disaster recovery and Incident handling

what is the most important between Disaster recovery and Incident Handling?

Answer:

The main difference is in timing. When a disruption takes place (related to information security), it can be handled through the procedure of security incidents (and can be generated a register with information about the incident related to the disruption), and after you can activate the Disaster recovery. Here maybe can be interesting to use a tool that help you to activate automatically, under certain parameters, the Disaster recovery when a disruption is detected. 

Finally, I think that this article about security incidents can be interesting for you “How a change in thinking can stop 59% of security incidents” : https://advisera.com/27001academy/blog/2015/02/16/change-thinking-can-stop-59-security-incidents/