Letting LVM set the meta-data size internally was not a good idea, as it produces really small metadata LVs. Adapts the same logic as the installer. Signed-off-by: Tim Marx <t.marx@proxmox.com> Reviewed-By: Dominik Csapak <d.csapak@proxmox.com> Tested-By: Dominik Csapak <d.csapak@proxmox.com>