When installed by default, Proxmox 5 VE adds a partition called local-lvm which can hold data, however it isn’t very useful as it cannot be accessed directly from the filesystem and takes around 50% of the total OS drive space.
In this short tutorial I will explain how to remove the local-lvm partition.
First you will need to delete local-lvm from the Storage area using the GUI.
Then log in to the console (via the GUI or SSH) and run the following three commands:
lvremove /dev/pve/data lvresize -l +100%FREE /dev/pve/root resize2fs /dev/mapper/pve-root
If everything went well you should have now reclaimed all of the space taken out by the local-lvm partition.