To expand an RDF meta device pair you have to do the following   1) Split or suspend the RDF  2) Symrdf deletepair  3) Expand R1 meta  4) Expand R2 meta  5) Symrdf createpair  6) Full establish  You do not have to remove the RDF capability attribute.  Sam Claret
What are the ways we can expand a thin striped meta whihc is an R1 device??
Expanding an thin Striped meta which is in active SRDF session.