Archive in EV from an Exchange 2010 non-primary DAG?

EV 10 SP2.  Exchange 2010.

They want to perform archiving from the 'non-primary DAG to reduce the IO on the primary DAG.

I do not think this is possible (for one thing, the tlogs go from the primary DAG to the repicas, NOT the other way around and the 'stubbing' is a logged transaction.

Anyway, asking if anyone knows of a way to do that.