Comment 2 for bug 230006

I tried your settings, this is before reboot:

$ sudo pvdisplay
  --- Physical volume ---
  PV Name /dev/mapper/mpath1-part1
  VG Name vg0
  PV Size 2,00 TB / not usable 1,23 MB
  Allocatable yes (but full)
  PE Size (KByte) 4096
  Total PE 524287
  Free PE 0
  Allocated PE 524287
  PV UUID znfa6r-X7FD-VXTd-WdsJ-LAu2-8SdS-relheA

I created a PV and a LV: /dev/vg0/lv0, /dev/mapper/mpath1-part1 is present.

After reboot, /dev/vg0/lv0 is still there, but /dev/mapper/mpath1-part1 has disappeared and /dev/mapper/vg0-lv0 is showing up.

"pvdisplay" and "multipath -ll" give no output but /dev/vg0/lv0 can be mounted (probably using only one static path)

I used your "devices" part in /dev/lvm/lvm.conf and my /etc/multipath.conf contains only "defaults { user_friendly_names yes }".

If you want to run more tests, go ahead, I'm using a sandbox blade server.