3.2. Combining LVM volume groups
To combine two volume groups into a single volume group, use the vgmerge command. You can merge an inactive "source" volume with an active or an inactive "destination" volume if the physical extent sizes of the volume are equal and the physical and logical volume summaries of both volume groups fit into the destination volume groups limits.
Procédure
Merge the inactive volume group databases into the active or inactive volume group myvg giving verbose runtime information:
# vgmerge -v myvg databases
Ressources supplémentaires
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vgmerge(8)man page
