You have lost the setuid bits of the files you copied.
	Its mentioned in passing at:

http://www.netbsd.org/Documentation/misc/index.html#problems_becoming_root

	You can probably fix it by using the '-p' flag when copying,
	or by reextracting the install tarfiles.

		David/absolute

       What _is_, what _should be_, and what _could be_ are all distinct.

On Wed, 13 Jan 1999, Ashley Campbell wrote:

> I installed a new rz56 drive and set it as my /usr partition. The problem
> is, whenever I boot with that drive set as /usr in /etc/fstab, su doesn't
> work. It says 'Sorry,' despite the correct password. 'su' works when I
> change fstab back to my old disk and use that /usr.
> 
> Is there something I'm missing? I simply disklabeled, 'newfs'ed and 'cp'ed
> all of my old /usr stuff to the new disk.
> 
> Thanks for the help.
> 
> -Ashley
>