Subj : Re: Find out what process using what drive?
To   : comp.os.linux
From : noone
Date : Wed Aug 18 2004 02:21 am

dhenson02@gmail.com (Deryck) tried to express:
> Anyone know how I can figure out what process is accessing a certain
> drive (along with the PID)?  I can't dismount certain drives because
> they are "busy", as root.  Thanks all.

Well, someone mentioned lsof but that's overkill.  There is a utility
for just what you need.  "man fuser"

.