Proxmox : Installation Failed – unable to create volume group ‘pve’

  1. If you have existing proxmox installation before, you might getting this error.
  2. Since proxmox uses logical volume management (lvm), the existing group of pve already been there. 
  3. To solved this problem follow this instructions:

a. Select debug mode on the installer.

b. cd to /sbin

c. lvm lvremove /dev/pve/root

d. lvm lvremote data

e. lvm vgremove pve


Ref : 

This article was written by matn0t.