msa 2050 active/active setup on RHEL 6

Hello,

I try to use my 2050 with 4 paths connected to the host as active/active array (2 dual-port HBA) . I use the Linux own dm-multipath solution, but it seems that whatever I do, it's running as round-robbin with only one path active at the same time.

I couldn't find any best practices about this so I hope here for help.

regards
Thomas