# vgscan -P
  Partial mode. Incomplete volume groups will be activated read-only.
  Reading all physical volumes.  This may take a while...
  Couldn't find device with uuid '5voaFk-fAc7-W9SU-h3Iy-3r5X-E96U-RmvyM3'.
  Couldn't find device with uuid '5voaFk-fAc7-W9SU-h3Iy-3r5X-E96U-RmvyM3'.
  Couldn't find device with uuid '5voaFk-fAc7-W9SU-h3Iy-3r5X-E96U-RmvyM3'.
  Found volume group "xen" using metadata type lvm2