Move DB to new drive

• set global flags noout and noin.
• stop OSD systemctl stop ceph-osd@3 and disable autostart systemctl disable ceph-osd@3
• dump NVM DB partition: dd if=/dev/nvme0n1p3 of=DB.img bs=4M
• shutdown machine and replace NVM drive

zfs create -V 5GB rpool/data/DB
 
ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-3 --devs-source /var/lib/ceph/osd/ceph-3/block.db --command bluefs-bdev-migrate --dev-target /dev/zvol/rpool/data/DB
 
inferring bluefs devices from bluestore path
 device removed:1 /var/lib/ceph/osd/ceph-3/block.db
 device added: 1 /dev/zd144

DRAFT:

ceph-bluestore-tool –path /var/lib/ceph/osd/ceph-12 –devs-source /var/lib/ceph/osd/ceph-12/block –devs-source /var/lib/ceph/osd/ceph-12/block.db –command bluefs-bdev-migrate –dev-target –dev-target /dev/vdg1