**Description of the false positive** Indeed, the loop variable `suffix` is not used in the loop body. That's not an issue though, the variable `suffix` is used **after** the loop. **URL to the alert on the project page on LGTM.com** https://lgtm.com/projects/g/ceph/ceph/snapshot/98d21225116c2bc83ed7761408f91d2e983311d9/files/src/ceph-volume/ceph_volume/util/disk.py?sort=name&dir=ASC&mode=heatmap#xd3036dc0d011c07e:1