Can't kill a umount

[Michael Hennebry]

On Sun, 6 Sep 2015, Tom Horsley wrote:

> That's probably because the data is just in memory and hasn't
> been flushed to the actual USB device yet. If you do manage
> to kill the umount, you'll probably have corrupted data on
> the USB drive.

Sometimes I get a "drive busy" message from umount,
which then fails.
In that case, a file has usually been open.
Does umount regard this as a different situation?

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
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