On Fri, Jan 06, 2017 at 08:10:20PM +0100, Xen wrote: > This is what I mean: > > Found duplicate PV 3U9ac3Ah5lcZUf03Iwm0cgMMaKxdflg0: using /dev/sdb4 not > /dev/sdc4 The handling of duplicate PVs has been entirely redone in recent versions. The problems you are having are well known and should now be fixed.