date > /var/log/lfsck_2017-12-06-n.log
lctl clear
lctl get_param debug
  debug=ext2 warning error emerg console
lctl set_param debug=lfsck
lctl debug_daemon start /var/log/lfsck_2017-12-06-n.debug
lctl lfsck_start -M nbp7-MDT0000 -A -t layout -r -n
  # wait for "lctl get_param -n osd-ldiskfs.*.oi_scrub | grep status" to show "completed"
lctl debug_daemon stop
lctl set_param debug="ext2 warning error emerg console"
lctl debug_file /var/log/lfsck_2017-12-06-n.debug >> /var/log/lfsck_2017-12-06-n.log 2>/var/log/lfsck_2017-12-06-n.err
date >> /var/log/lfsck_2017-12-06-n.log
lctl get_param -n osd-ldiskfs.*.oi_scrub > /var/log/lfsck_2017-12-06-n.status
grep -c "inconsistent file owner for" /var/log/lfsck_2017-12-06-n.log
  1794839