unmount


# umount /media/disk/

umount: /media/disk: device is busy


# fuser -m /dev/sdc1

/dev/sdc1: 538


# ps auxw|grep 538


donncha 538 0.4 2.7 219212 56792 ? SLl Feb11 11:25 rhythmbox

http://ocaoimh.ie/2008/02/13/how-to-umount-when-the-device-is-busy/