umount partition is busy

[Hugo Vanwoerkom <hvw59601@care2.com>]

Hi,

I do:

umount /hda14

and get:

umount: /hda14: device is busy
umount: /hda14: device is busy


Is there a way of finding out *why* it is busy? Obviously it is linked 
to someplace, but where?

Thanks!

H