Quincy is right that BCV's work in clone emulation mode on VMAX  In one of the environment I worked we used BCV's on VMAX but the BCV's were TDEV's.   So the steps for setting up the R2-BCV relationship  is as follows:-  1)Convert the Raid-5 device that you want to use as BCV  as BCV+R-5 symconfigure -sid XXX "convert dev YYY to BCV+R-5;" preview  2) Do an establish with symmir command , use the r2bcv_pairs file for the pairing info between R2 and BCV's  symmir -sid XXXX -f  r2bcv_pairs.txt est -full -nop                  
DMX-4 and VMAX  need info for created BCV need BCVs to be associated with R2s on VMAX side   Raid 5 striped meta devices,  by adding to storage group through command line or SMC  we have SRDF/S  Thanks in advance
VMAX -R2-BCV