Disaster recovery

In the event of a disaster that prevents access to the production storage, host access can be enabled to the recovery copy. When the original production system is accessible again, replication can be restarted in either direction to restore redundancy.

Replication for disaster recovery can be configured with or without the use of storage partitions. Using storage partitions allows high availability to be easily added later and will also allow the use of future Flash Grid functionality. Storage partitions can be used where the host environment meets the supported configurations. For more information, see Storage partitions.

Existing configurations using replication for disaster recovery without storage partitions can be migrated into a storage partition by using the CLI. This allows an existing 2-site disaster recovery (DR) configuration to be extended to a 3-site HA and DR configuration while continuing to support disaster recovery operations and without requiring resynchronization of the recovery copy.

Replication for disaster recovery offers the flexibility to use different replication policies for different volume groups to match business requirements for different recovery point objectives, even on the same partnership or within the same storage partition.