[ceph-users] Ceph raw capacity usage does not meet real pool storage usage

Hello everybody, I have a Ceph cluster (14.2.9) running with 18 X 600GB HDD OSDs. There are three pools (size:3, pg_num:64) with an image size of 200GB on each, and there are 6 servers connected to these images via iSCSI and storing about 20 VMs on them. Here is the output of "ceph df": POOLS: POOL ID STORED OBJECTS USED %USED MAX AVAIL cephfs_data 1 0 B 0 0 B 0 0 B cephfs_metadata 2 17 KiB 22 1.5 MiB 100.00 0 B defaults.rgw.buckets.data 3 0 B 0 0 B 0 0 B defaults.rgw.buckets.index 4 0 B 0 0 B 0 0 B .rgw.root 5 2.0 KiB 5 960 KiB 100.00 0 B default.rgw.control 6 0 B 8 0 B 0 0 B default.rgw.meta 7 393 B 2 384 KiB 100.00 0 B default.rgw.log 8 0 B 207 0 B 0 0 B rbd 9 150 GiB 38.46k 450 GiB 100.00 0 B rbd3 13 270 GiB 69.24k 811 GiB 100.00 0 B rbd2 14 150 GiB 38.52k 451 GiB 100.00 0 B Based on this, I expect about 1.7 TB RAW capacity usage, BUT it is currently about 9TBs! RAW STORAGE: CLASS SIZE AVAIL USED RAW USED %RAW USED hdd 9.8 TiB 870 GiB 9.0 TiB 9.0 TiB 91.35 TOTAL 9.8 TiB 870 GiB 9.0 TiB 9.0 TiB 91.35 And the cluster is down because there is very little capacity remaining. I wonder what makes this and how can I get it fixed. Your help is much appreciated Thank You