Folks,

I am fairly new to SRDF and i need your help in understanding SRDF/A. I will highly appreciate if you could answer the following questions:

i)  If i understand correctly, the SRDF devices get replicated using the SRDF directors and the hosts access the SRDF devices using the front end directors. Correct?
ii) What are RA groups?. When i configure new R1 and R2 device pairs , i understand i must add the new devices to the existing/new disk group, do i need to add the new pair to RA groups as well?
iii) If i need to add new R1, R2 pairs to the RA groups as well. Can i add the new pair to any of the existing RA groups?.

iv) Do all the devices in a device group need to be assigned to the same RA group?. If so, what command will tell which devices currently belong to which RA group?
v)  Is there any pairing between the RA group in Source Symmetrix and RA group in the target Symmetrix?. If there is any pairing, how is the pairing done?

vi) If there is any pairing between the RA group in Source Symmetrix and RA group in the target Symmetrix, how is that pairing created?. If i do not put the new devices in the paired RA groups,  will the replication not work? What is the command to check the pairing of RA groups in source and target symmetrix?

Thanks in Advance,