On Tue, Dec 07, 1999 at 10:59:46AM +0100, Leo Weppelman wrote:
> Since the close functions of sd & wd do no longer invalidate the disklabel,
> I wonder what the proposed method for forcing a reload is.
> 
> The problem I am experiencing is this:
>  [...]
> Any ideas of how to (temporarely?) fix it?
> 
> I can think of:
>    - make edahdi reboot the system (Ugh!)
>    - let an eject-ioctl on a fixed disk cause media-loaded to dropped (hacky)

Ok add another IOCTL for this.
There was a discussion about this some time ago in this list, you may want
to check the archives.