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.
--
udev breaks multipath after reboot when using LVM
https://bugs.launchpad.net/bugs/230006
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