Oracle VM 3, multipathing and HP EVA 8400

Hi all,

we are testing an Oracle VM environment with 3 nodes, 2 HP EVA 8400 Arrays and 2 Netapp configure in Metrocluster.

We are facing some problems with multipath configuration. Netapp is working perfectly. Hp EVA totally not.

Here is our configuration for device HP EVA:

        device {

                vendor "(HP|COMPAQ)"

                product "HSV1[01]1\(C\)COMPAQ|HSV[2][01]0|HSV300|HSV4[05]0"

                path_grouping_policy group_by_prio

                getuid_callout "/sbin/scsi_id -g -u -s /block/%n"

                path_checker tur

                path_selector "round-robin 0"

                prio hp_sw

                rr_weight uniform

                failback immediate

                hardware_handler "0"

                no_path_retry 12

                rr_min_io 100

                }

The questions:

1) it seems that "Rescan physical disks" on OVM interface is totally different from doing "service multipathd reload" on the physical server. Infact it seems that "rescan physical disk" does not read /etc/multipath.conf. So the first question is WHAT DOES ACTUALLY DO THE COMMAND "RESCAN PHYSICAL DISKS" IN THE OVM INTERFACE?