Assuming you want to completely eliminate the vg so that you can
rebuild it from scratch and the lv's are no longer mounted, then this
should work: IF the lv is mounted you should remove it from fstab and
reboot, and see what state it comes up in and first attempt to
vgchange it off as that is
OK Chaps I've broken it.
I have a VG containing one LV and made up of 3 live disks and 2 failed disks.
Whilst the disks were failing I attempted to move date off the failing
disks, which failed so I now have a pvmove0 that won't go away either.
So if I attempt to even remove a live disk I get
