root@admin:/media# umount /media/scan
umount: /media/scan: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
root@admin:/media# fuser -m /media/scan/
/media/scan:          2237c  2307c
root@admin:/media# fuser -m -k TERM /media/scan/
/media/scan:          2237c  2307c
root@admin:/media# umount /media/scan