From owner-freebsd-hackers Sat Jun 26 8:29:45 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from uni4nn.gn.iaf.nl (osmium.gn.iaf.nl [193.67.144.12]) by hub.freebsd.org (Postfix) with ESMTP id 842D414FD9 for ; Sat, 26 Jun 1999 08:29:14 -0700 (PDT) (envelope-from wilko@yedi.iaf.nl) Received: from yedi.iaf.nl (uucp@localhost) by uni4nn.gn.iaf.nl (8.9.2/8.9.2) with UUCP id RAA23396; Sat, 26 Jun 1999 17:15:39 +0200 (MET DST) Received: (from wilko@localhost) by yedi.iaf.nl (8.9.3/8.9.3) id LAA98821; Sat, 26 Jun 1999 11:45:37 +0200 (CEST) (envelope-from wilko) From: Wilko Bulte Message-Id: <199906260945.LAA98821@yedi.iaf.nl> Subject: Re: System unique identifier..... In-Reply-To: from Matthew Jacob at "Jun 25, 1999 2:38: 4 pm" To: mjacob@feral.com Date: Sat, 26 Jun 1999 11:45:36 +0200 (CEST) Cc: justin@apple.com, tech-kern@netbsd.org, freebsd-hackers@freebsd.org X-Organisation: Private FreeBSD site - Arnhem, The Netherlands X-pgp-info: PGP public key at 'finger wilko@freefall.freebsd.org' X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG As Matthew Jacob wrote ... > > Yes, you want the WWN to stay constant. That doesn't mean it should > necessarily be the same physical box. Nor does it mean it should be a > system that comes with a WWN assigned to by the manufacturer. Manufacturers have to register and 'get' a unique range they can assign to their products. How do you guarantee that your homegrown WWN is really unique? > I think I'm confusing myself and people. I have a WWN. By definition it > should be unique value. All I'm asking for is a kernel function to help me > generate such a thing (despite what Eduardo says). > > > On Fri, 25 Jun 1999, Wilko Bulte wrote: > > > As Matthew Jacob wrote ... > > > > > > > > FYI: The Compaq HSG80 Fibrechannel RAID controllers have their > > > > WWN in NVRAM. One is supposed to get the WWN from a label on the *cabinet* > > > > into the HSG controller. This allows for easy hardware swap in case of > > > > hardware grief. > > > > > > Yes, if you want the WWN to stay constant. > > > > Well, you do. Especially when you are using things like zoning (like > > that Brocade switches can do) or when the host directly ties things to > > the wwn it talks to. E.g. for connection to Sun we use Jaycor adapters > > that allow things like "target=foo lun=bar www="<64bitnumber>" in the > > Solaris /kernel/drv/sd.conf file > > And to boot a Sun over fibre channel, you use the WWN. Well, we currently don't support that, but indeed that is what you would do. Tru64 Unix does something similar. -- | / o / / _ Arnhem, The Netherlands - Powered by FreeBSD - |/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message