Problem with 16-in-1 card reader

[Damian Gerow]

Thus spake Alex Dupre (ale at FreeBSD.org) [11/03/06 22:18]:
: > This problem has been discussed many times on the lists. In order to
: > update devfs you can use:
: > 
: > cat /dev/null > /dev/daX
: > 
: > I seem to remember another method using dd.
: > 
: > I hope this helps.
: 
: The 'cat' way works, thanks. Perhaps we should add this info somewhere
: in a man page.

Really?  Isn't there a nicer way to do this?  i.e. Doesn't the card reader
(or other USB-connected devices) notify that a disk/card/whatever has been
removed or inserted?