ceph/doc/ceph-volume/lvm/newdb.rst

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.. _ceph-volume-lvm-newdb:
``new-db``
===========
Attaches the given logical volume to OSD as a DB.
Logical volume name format is vg/lv. Fails if OSD has already got attached DB.
Attach vgname/lvname as a DB volume to OSD 1::
ceph-volume lvm new-db --osd-id 1 --osd-fsid 55BD4219-16A7-4037-BC20-0F158EFCC83D --target vgname/new_db