device. The storage device is normally partitioned into two parts:
#. A small partition is formatted with XFS and contains basic metadata
-for the OSD. This *data directory* includes information about the OSD
-(its identifier, which cluster it belongs to, and its private keyring.
+ for the OSD. This *data directory* includes information about the
+ OSD (its identifier, which cluster it belongs to, and its private
+ keyring.
+
#. The rest of the device is normally a large partition occupying the
-rest of the device that is managed directly by BlueStore contains all
-of the actual data. This *main device* is normally identifed by a
-``block`` symlink in data directory.
+ rest of the device that is managed directly by BlueStore contains
+ all of the actual data. This *primary device* is normally identifed
+ by a ``block`` symlink in data directory.
It is also possible to deploy BlueStore across two additional devices: