[arch-general] Moving the root filesystem to a multipath device

Hi there, I'm working with a EMC Fibre Channel storage and I need to move the root filesystem to a multipath device. Ubuntu has a package named "multipath-tools-boot" that modify the initramfs and adds the script, modules and binary for multipath. I do not know much about mkinitcpio, but I think I need a hook for multipath. Can someone help me with this? Regards, Ary