The disk is mounted by sudo mount /dev/sdd5 /media/SDD/Docs and sudo mount /dev/sdd6 /media/SDD/Images and so on, thus there are some directories corresponding to the volumes of the mounted disk.
And when I wanted to eject the disk, i.e. using sudo umount /media/SDD/* to unmount the disk, there is an alert message saying
Failed to eject medium; one or more volumes on the medium are busy.
I've tried the command sudo lsof | grep "/media/SDD" to check the status of the mounted disk, but no information is shown.
Are there any commands to show what application are using the mounted disk? I want to check this to protect the files from disasters. Thank you!
UPDATE:
$ fuser -mv /media/SDD/
USER PID ACCESS COMMAND
/media/SDD: root kernel mount /
ubuntu 2831 Frce. Xvnc4
ubuntu 2839 Frce. vncconfig
ubuntu 2841 Frce. gnome-session
ubuntu 2844 .rce. dbus-launch
ubuntu 2849 .rce. dbus-launch
ubuntu 2850 .rce. dbus-daemon
ubuntu 2851 .rce. dbus-daemon
ubuntu 2858 .rce. gconfd-2
ubuntu 2872 Frce. gnome-settings-
ubuntu 2900 .rce. gvfsd
ubuntu 2907 Frce. gsd-printer
ubuntu 2911 Frce. metacity
ubuntu 2987 .rce. gconfd-2
ubuntu 2988 Frce. gnome-panel
ubuntu 2992 .rce. dconf-service
ubuntu 2997 Frce. gnome-fallback-
ubuntu 2998 Frce. notification-da
ubuntu 3003 Frce. bluetooth-apple
ubuntu 3004 Frce. nautilus
ubuntu 3014 .rce. gvfs-gdu-volume
ubuntu 3025 .rce. gvfs-gphoto2-vo
ubuntu 3027 .rce. gvfs-afc-volume
ubuntu 3035 frce. gvfsd-trash
ubuntu 3037 .rce. gvfsd-burn
ubuntu 3041 Frce. indicator-apple
ubuntu 3043 .rce. trashapplet
ubuntu 3053 Frce. gvfsd-metadata
ubuntu 3058 .rce. indicator-sessi
ubuntu 3060 .rce. indicator-appli
ubuntu 3062 .rce. indicator-messa
ubuntu 3064 .rce. indicator-sound
ubuntu 3099 Frce. pulseaudio
ubuntu 3251 .rce. gconf-helper
ubuntu 3262 Frce. gnome-screensav
ubuntu 3263 Frce. zeitgeist-datah
ubuntu 3271 Frce. zeitgeist-daemo
ubuntu 3277 Frce. zeitgeist-fts
ubuntu 3285 Frce. cat
ubuntu 3527 Frce. deja-dup-monito
ubuntu 5516 .rce. bash
ubuntu 6170 .r.e. bash
ubuntu 6488 .r.e. bash
ubuntu 8940 Frce. gnome-terminal
ubuntu 13309 Fr.e. MATLAB
ubuntu 13468 .r.e. matlab_helper
ubuntu 17913 .rce. ssh
ubuntu 19035 .r.e. bash
ubuntu 19615 fr.e. MATLAB
ubuntu 19621 fr.e. MATLAB
ubuntu 19623 fr.e. MATLAB
ubuntu 19625 fr.e. MATLAB
ubuntu 19627 fr.e. MATLAB
ubuntu 19629 fr.e. MATLAB
ubuntu 19632 fr.e. MATLAB
ubuntu 19634 fr.e. MATLAB
ubuntu 19813 .r.e. matlab_helper
ubuntu 19814 .r.e. matlab_helper
ubuntu 19819 .r.e. matlab_helper
ubuntu 19822 .r.e. matlab_helper
ubuntu 19824 .r.e. matlab_helper
ubuntu 19826 .r.e. matlab_helper
ubuntu 19827 .r.e. matlab_helper
ubuntu 19834 .r.e. matlab_helper
ubuntu 20716 .r.e. git
ubuntu 20717 .r.e. pager
ubuntu 20725 .rce. bash
$ fuser -mv /media/SDD/*
USER PID ACCESS COMMAND
/media/SDD/Data2010: root kernel mount /media/SDD/Data2010
/media/SDD/Data2012: root kernel mount /media/SDD/Data2012
/media/SDD/Docs: root kernel mount /media/SDD/Docs
/media/SDD/Doctor: root kernel mount /media/SDD/Doctor
/media/SDD/Files1: root kernel mount /media/SDD/Files1
/media/SDD/Files2: root kernel mount /media/SDD/Files2
/media/SDD/Papers: root kernel mount /media/SDD/Papers
/media/SDD/Temp: root kernel mount /media/SDD/Temp
/media/SDD/Videos: root kernel mount /media/SDD/Videos
/media/SDD/Work: root kernel mount /media/SDD/Work