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 [email protected] with "unsubscribe freebsd-hackers" in the body of the message
