sda
? Looks like it might be an old PVE installation, if you don't need that anymore you can select /dev/sda
and then click "Wipe disk", after that you can select it under "Directory" when clicking "Create: Directory", there you can select to use it as a new datastore.vgchange -a n <VG_NAME>
vgs
, it should just be pve
, but just to be sure check with vgs
. Then wiping it should work.