I'd like to watch disk activity on my USB external hard drive. I know that I can use
iotop to monitor disk I/O for each running process, but is there a way to get a measure per filesystem?
I'm not skilled in this area, but iostat comes to mind. You can install it with the sysstat package. Good luck!
dstat is better that iostat for monitoring strictly disk activity.
I am running the following command while moving files from one harddrive to another
for more info, have a look at this page