Home > Workload Solutions > SAP > Guides > SAP HANA TDI Guides > Business Continuity and Disaster Recovery with Dell PowerMax Storage for SAP HANA TDI Deployments > Detailed steps
The following steps include command examples.
Note: For a full explanation of the command structure, see Dell EMC Solutions Enabler SRDF Family: CLI User Guide.
symcg –type RDF2 create HANA_CG_REMOTE –rdf_consistency
symcg –sid 016 –cg HANA_CG_REMOTE add dev 01A data1
symcg –sid 016 –cg HANA_CG_REMOTE add dev 01B data2
symcg –sid 016 –cg HANA_CG_REMOTE add dev 01E data3
symcg –sid 016 –cg HANA_CG_REMOTE add dev 019 log1
symcg –sid 016 –cg HANA_CG_REMOTE add dev 01C log2
symcg –sid 016 –cg HANA_CG_REMOTE add dev 01D log3
symcg –cg HANA_CG disable
To verify the SRDF consistency of the group, run:
symrdf –cg HANA_CG query
symrdf –cg HANA_CG_REMOTE failover
Note: If consistency is enabled on SRDF/A-capable devices within the group, the –force option must be applied for failover.
The R2 devices in the composite group HANA_CG_REMOTE should now be in a read/write enabled state.
To verify the status of the devices, run:
symrdf –cg HANA_CG_REMOTE query
SAP HANA can now be restarted at the remote site. Ensure that the global.ini file of the standby SAP HANA servers contains the partition entries with the pointers to the UUIDs of the R2 devices.
Run the query command to verify the status of the device. When the values for SRDF pair state are set to Failed Over or Partitioned, the personality of the devices can be swapped and the SRDF link can be reestablished to continue to storage replication.
symrdf –cg HANA_CG_REMOTE swap
The personality of the devices is changed.
To verify the personality swap:
symrdf –cg HANA_CG_REMOTE query
symrdf –cg HANA_CG_REMOTE establish
The SRDF link is reestablished.
To verify the status of the synchronization:
symrdf –cg HANA_CG_REMOTE query
symcg –cg HANA_CG_REMOTE enable
To verify the status of the synchronization:
symrdf –cg HANA_CG_REMOTE query