It seems there is a known issue with the EMC Mirrorview SRA if all the MirrorView replicated LUNs are within a consistency group. Site Recovery Manager errors out during device discovery with the following error:
SRA command ‘discoverDevices’ failed. No replicated devices could be found. Please verify the correct array managers and array pairs are configured.
The SRA version is 5.0.2 and the Mirroview Enabler version is 18.104.22.168
The workaround is to create a new replicated LUN but DO NOT put it in any consistency group. I got this workaround from this post. Tried it and SRM was able to discover the replicated LUN’s.