usage: ceph-osd -i <ID> [flags]
  --osd-data PATH data directory
  --osd-journal PATH
                    journal file or block device
  --mkfs            create a [new] data directory
  --mkkey           generate a new secret key. This is normally used in combination with --mkfs
  --monmap          specify the path to the monitor map. This is normally used in combination with --mkfs
  --osd-uuid        specify the OSD's fsid. This is normally used in combination with --mkfs
  --keyring         specify a path to the osd keyring. This is normally used in combination with --mkfs
  --convert-filestore
                    run any pending upgrade operations
  --flush-journal   flush all data out of journal
  --osdspec-affinity
                    set affinity to an osdspec
  --dump-journal    dump all data of journal
  --mkjournal       initialize a new journal
  --check-wants-journal
                    check whether a journal is desired
  --check-allows-journal
                    check whether a journal is allowed
  --check-needs-journal
                    check whether a journal is required
  --debug_osd <N>   set debug level (e.g. 10)
  --get-device-fsid PATH
                    get OSD fsid for the given block device
  --run-benchmark   run a throughput benchmark test against the OSD and dump the result

  --conf/-c FILE    read configuration from the given configuration file
  --id/-i ID        set ID portion of my name
  --name/-n TYPE.ID set name
  --cluster NAME    set cluster name (default: ceph)
  --setuser USER    set uid to user or uid (and gid to user's gid)
  --setgroup GROUP  set gid to group or gid
  --version         show version and quit

  -d                run in foreground, log to stderr
  -f                run in foreground, log to usual location

  --debug_ms N      set message debug level (e.g. 1)