Hello, My name is Mihai, and I have started using CEPH this mount for a HPC cluster. When was lunch in the production the available space shown was 80TB now is 16TB and I didn't do anything, while I'm having 12 OSD (SSD of 14TB): sudo ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 167.64825 root default -3 167.64825 host sto-core-hpc01 0 ssd 13.97069 osd.0 up 1.00000 1.00000 1 ssd 13.97069 osd.1 up 1.00000 1.00000 2 ssd 13.97069 osd.2 up 1.00000 1.00000 3 ssd 13.97069 osd.3 up 1.00000 1.00000 4 ssd 13.97069 osd.4 up 1.00000 1.00000 5 ssd 13.97069 osd.5 up 1.00000 1.00000 6 ssd 13.97069 osd.6 up 1.00000 1.00000 7 ssd 13.97069 osd.7 up 1.00000 1.00000 8 ssd 13.97069 osd.8 up 1.00000 1.00000 9 ssd 13.97069 osd.9 up 1.00000 1.00000 10 ssd 13.97069 osd.10 up 1.00000 1.00000 11 ssd 13.97069 osd.11 up 1.00000 1.00000 sudo ceph df detail --- RAW STORAGE --- CLASS SIZE AVAIL USED RAW USED %RAW USED ssd 168 TiB 156 TiB 12 TiB 12 TiB 7.12 TOTAL 168 TiB 156 TiB 12 TiB 12 TiB 7.12 --- POOLS --- POOL ID PGS STORED (DATA) (OMAP) OBJECTS USED (DATA) (OMAP) %USED MAX AVAIL QUOTA OBJECTS QUOTA BYTES DIRTY USED COMPR UNDER COMPR .mgr 1 1 705 KiB 705 KiB 0 B 2 1.4 MiB 1.4 MiB 0 B 0 8.1 TiB N/A N/A N/A 0 B 0 B cephfs.cephfs.meta 2 16 270 MiB 270 MiB 0 B 85.96k 270 MiB 270 MiB 0 B 0 16 TiB N/A N/A N/A 0 B 0 B cephfs.cephfs.data 3 129 12 TiB 12 TiB 0 B 3.73M 12 TiB 12 TiB 0 B 42.49 16 TiB N/A N/A N/A 0 B 0 B While on the client side I have this: $ df -h 10.18.31.1:6789:/ 21T 13T 8.1T 61% /data I don't know where it's gone all the space that was at the beginning. Someone has any hint? Best regards, Mihai