Hi, I’d like to remove some “spurious" data: root@nerffs03:/# ceph df --- RAW STORAGE --- CLASS SIZE AVAIL USED RAW USED %RAW USED hdd 1.0 PiB 1.0 PiB 47 GiB 47 GiB 0 TOTAL 1.0 PiB 1.0 PiB 47 GiB 47 GiB 0 --- POOLS --- POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL .mgr 1 1 70 MiB 19 209 MiB 0 327 TiB .nfs 3 32 572 B 4 36 KiB 0 327 TiB root@nerffs03:/# as you can see, there are no data pools. The 47GiB could be from previous pools/filesystems that I used for testing. how can I remove this “spurious” data without affecting the OSDs? I was checking "ceph-volume lvm zap”, but I am not sure it this is the right one. (I am running ceph version quincy 17.2.7) Thanks, Giuliano.