In the failover process of the cloud server disaster recovery service CSDR of FusionCloud R6, there are mainly Next few steps, which of the following is the correct failover sequence? ( one)

1. Through BCManager, one-click completion (the storage layer LUN configuration can be read and mounted to the disaster recovery side computing node

Pull up the disaster recovery cloud host and access the disaster recovery VPC) related configuration.

2. Switch the access authentication component Keystone.

3. Switch the Host domain name record of ManageOne SC to resolve the IP address and switch the external DNS record.

4. Switch the service delivery system to ManageOne SC.

5. The tenant logs in to the disaster recovery virtual machine, and checks and starts the business system.