Identifying hidden disk space using bind mounts

Issue

• Discrepancies exist between df and du command outputs.

• The filesystem reflects 100% utilization, but standard directory scans do not account for the consumed space.

  # df -h /
  Filesystem                  Size  Used Avail Use%  Mounted on
  /dev/mapper/vg_data-lv_data   6G    6G     0 100%  /data
  
  # du -sch /
  3G    /data
  3G    total