[DRBD-user] multipathd ignores my drbd0

[Dan Barker]

How do I get multipathd to notice my drbd block devices?

RHEL5 (Oracle VM 3.0.3.127, actually), 2.6.32.21-45xen.
Drbd 8.4.1:
multipath-tools says v0.4.9. I can't seem to find the multipath version.

resource r0 {
    on OVMPam {
        volume 0 {
            device       /dev/drbd0 minor 0;
            disk         /dev/sdb;
            meta-disk    internal;
        }
        address          ipv4 172.30.0.167:7789;
    }
    on DRPam {
        volume 0 {
            device       /dev/drbd0 minor 0;
            disk         /dev/sdb;
            meta-disk    internal;
        }
        address          ipv4 172.30.0.170:7789;
    }
    startup {
        become-primary-on OVMPam;
    }
}

As-distributed global.

All multipath commands reply "Apr 09 08:10:50 | DM multipath kernel driver
not loaded", as if no devices were detected at boot time.

I have drbd start before multipathd.

Relax, I have no plans to multipath to this device, Oracle VM looks only in
/dev/mapper for repository candidates.