Below are the restrictions if you are looking at larger R2. All swap and SRDF/Star operations are blocked. If SYMAPI_RDF_CREATEPAIR_LARGER_R2 is set to DISABLE in the options file, all operations are blocked.  Data mirrored to a larger R2 device cannot be restored back to its R1 device.  Concatenated metadevices are not supported but striped metadevices are supported.  Usually we only see this used in migration activities because of the restrictions.
Hi,  What are the limitations of R2 device attributes, in reference to R1.  I have few  devices which are stripped 80gb( few 3 way meta and few no meta) devices. By new standard we are following 4 way stripped 100gb device.Usually SRDF we do same config as R1 device, but can I change the size and meta members for R2 device?? Please let me know if I can find any documentation on it. symm code is 5876
SRDF R1-R2 device attributes