On a VMAX 5876 series and with Solution Enabler / SYMCLI 7.4.0.2, does emc recommends Adaptive Copy as best method for replication !?  ACP is best when you are Migrating huge chunks of data between the Symms. Not an ideal solution for replication.  Why is the default -rdf_mode value is Adaptive while creating/using symrdf createpair command  !? Before 5876, the default mode while creating SRDF pair was Synchronous which was creating some confusion for the customers who have not purchased the SRDF/S licenses. They had to use -rdf_mode async or acp_dsk while creating the srdf pair. Thats why the default mode is changed to ACP in 5876 code.  Regarding your third question, i am not sure if SRDF/AR works with ACP mode? I need to check the docs...   regards, Saurabh
On a VMAX 5876 series and with Solution Enabler / SYMCLI 7.4.0.2, does emc recommends Adaptive Copy as best method for replication !?   Why is the default -rdf_mode value is Adaptive while creating/using symrdf createpair command  !?   Some of the doucments indicate that       Base/First Transfer (Replication) be done via ACP mode then set the srdf mode to sync or async depending on the requirement !       Incase of broken links/Large data transfers use ACP mode.  Does Adpative Copy add much value when AR ( Automatic Replication )  topology been used/under consideration !? 
Does EMC recommends Adaptive Copy as recommended/best replication topology