| VGMERGE(8) | System Manager's Manual | VGMERGE(8) | 
vgmerge - merge two volume groups
vgmerge [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [-l|--list]
  [-t|--test] [-v|--verbose] DestinationVolumeGroupName SourceVolumeGroupName
vgmerge merges two existing volume groups. The inactive SourceVolumeGroupName
  will be merged into the DestinationVolumeGroupName if physical extent sizes
  are equal and physical and logical volume summaries of both volume groups fit
  into DestinationVolumeGroupName's limits.
See lvm for common options. -l, --list Display merged
  DestinationVolumeGroupName like "vgdisplay -v".
  - -t, --test
- Do a test run WITHOUT making any real changes.
"vgmerge -v databases my_vg" merges the inactive volume group named
  "my_vg" into the active or inactive volume group named
  "databases" giving verbose runtime information.
lvm(8), vgcreate(8), vgextend(8), vgreduce(8)