Placement group bits, used to specify the default number of placement groups.
+
-NOTE: 'osd pool default pg num' does not work for default pools.
+Depreacted. This setting was deprecated in recent Ceph versions.
`--size` `<integer> (1 - 7)` ('default =' `3`)::
Enables encryption of the OSD.
+`--osds-per-device` `<integer> (1 - N)` ::
+
+OSD services per physical device. Only useful for fast NVMe devices"
+ ." to utilize their performance better.
+
`--wal_dev` `<string>` ::
Block device name for block.wal.