BCV

Using BCVs to Preserve a Copy of the Remote SRDF/A Data

Although SRDF/A replication does not require TimeFinder/Mirror software during normal operation, you may find it useful to mirror the R2 data on TimeFinder BCVs at the remote site to preserve a consistent image of the data on the R2 devices before resynchronization operations. SRDF/A allows you to perform a consistent split on R2-side BCVs without dropping the RDF links, allowing you to preserve point-in-time copies of the R2 data without disrupting the SRDF/A operation between the R1 and R2 devices.

You can control the R2-side BCVs through the RDF1 type device group defined on the local host or an RDF2 type device group defined on the remote host. Controlling remotely-associated BCVs from the R1 side requires using the -rdf option. Controlling from the R2 side omits the option.

From the R1-side host, the symmir split -rdf command with the -consistent option splits the R2-side BCV pairs, making the BCV data available to the R2-side host. For example: symmir -g AsyncGrp split -rdf -consistent