We have allocated 10 TB storage to a AIX cluster which has a DMX 4 has the backend. We used two FA's 7c:0 and 10c:0. Now due to some performance issues we decided to add two more FA's(04 and 13) other than 7c and 10c. So, my doubt is can i map the existing devices on 7c and 10 c to 4 and 13 when the AIX cluster is up and running. Will there be any impact to the applications. Also do i need to ensure any other things before adding two more FA pair. Is there any need that devices mapped to other FA (4 and 13 ) must have same Lund address as mapped to (7c and 10c). I was thinking it should be a straight forward change(online). Please let me know if i am missing anything.

Thanks,