Purity ActiveDR is a near synchronous replication technique available in FlashArray//X and FlashArray//C. It provides near 0 Recovery Point Objective capabilities while not affecting response times. Volumes on the Active System can be read and written from while promoted and volumes on the disaster recovery system are read only until promoted.
Failover or migration to the disaster recovery system is achieved by demoting the Active Systems volumes, promoting the Disaster Recovery Systems volumes, attaching them to the Standby SAP HANA system, and then starting the instance.
Further information can be found on Active DR in the ActiveDR Installation Planning and Best Practices Guide.
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