Delete Local LVM and increase Local Partition - gorect/Proxmox GitHub Wiki

As long as you do not have any data stored on you LVM partition, you can delete it and increase the size for your main partition with the following commands.

  1. Delete the local-lvm directory

Go to Datacenter > Storage
Select the Local-LVM partition and choose the remove option near the top of the page.

  1. Delete local-lvm from CLI:

Next you will need to login to the shell as root to remove the partition and reallocate the space.
lvremove /dev/pve/data

  1. Reallocate the space

lvresize -l +100%FREE /dev/pve/root
resize2fs /dev/mapper/pve-root

Just give Proxmox a few seconds for the WebUI to catch up and you should see your local reflect the proper size for you disk!