Opbzil

After you edit the multipath.conf file you can run the following commands to load and start it as well as to show you wht is detected.

modprobe dm-multipath
service multipathd start
multipath -v2

The multipath -v2 command prints out multipathed paths that show which devices are multipathed. If the command does not print anything out, ensure that all SAN connections are set up properly and the system is multipathed.

if all is ok then run

chkconfig multipathd on

to ensure that the service starts everytime after a reboot