Hello,   Upgrade the firmware on the old group first then try again.  Revisions that far apart aren't tested nor supported.  The firmware upgrade instructions have a table of compatible revisions.   Regards, 
Dear FriendsWe need to backup volumes at old array to new array - Old array ( PS6010 with firmware V4.3.6 ) - Old Group- New array ( PS4110 with firmware V7.0.9 ) - New Group after i configured replication between two group when i try to replicate volume from Old Group to New Group it fail with error : . iSCSI: Unknown response code but replication from New Group to Old Group success without any error  is there any way to clone volumes from old array to new array ( online )? 
Replication between PS6010 and PS410 issue