Unable to umount

[perryh at pluto.rain.com]

John Levine <johnl at iecc.com> wrote:
> >> [robert at dell64] ~> umount Flash
> >> umount: unmount of /home/robert/Flash failed: Device busy
>
> ... The problem is likely that HAL or one of its friends helpfully
> has the device open just in case you might want to ask questions
> about it.

I that case, shouldn't lsof(8) have reported something?