is this... -> $ systemctl stop ceph-9f4f9dba-72c7-11f0-8052-525400519d29@osd.10.service -> $ ceph-bluestore-tool bluefs-bdev-sizes --path /var/lib/ceph/9f4f9dba-72c7-11f0-8052-525400519d29/osd.10/ inferring bluefs devices from bluestore path 1 : device size 0x4affc00000(300 GiB) : using 0x36f49bd000(220 GiB) -> $ ceph-bluestore-tool bluefs-bdev-expand --path /var/lib/ceph/9f4f9dba-72c7-11f0-8052-525400519d29/osd.10/ inferring bluefs devices from bluestore path 1 : device size 0x4affc00000(300 GiB) : using 0x36f49bd000(220 GiB) Expanding DB/WAL... 1 : nothing to do, skipped not weird(wrong) - would not all agree? -> $ ceph osd df ... 10 hdd 0.29300 1.00000 300 GiB 219 GiB 218 GiB 567 KiB 632 MiB 81 GiB 72.91 0.99 165 up -> $ ceph-volume lvm list ... ====== osd.10 ====== ... devices /dev/vdc ... -> $ fdisk -l /dev/vdc Disk /dev/vdc: 400 GiB, 429496729600 bytes, 104857600 sectors Something, somewhere Ceph is ignoring, not picking up...? From what I can find 'ceph-volume' does not offer re-sizing volumes.