From owner-freebsd-arch Fri Jul 28 9:13:59 2000 Delivered-To: freebsd-arch@freebsd.org Received: from post.mail.nl.demon.net (post-11.mail.nl.demon.net [194.159.73.21]) by hub.freebsd.org (Postfix) with ESMTP id 193D037BE95; Fri, 28 Jul 2000 09:13:54 -0700 (PDT) (envelope-from wkb@freebie.demon.nl) Received: from [212.238.54.101] (helo=freebie.demon.nl) by post.mail.nl.demon.net with smtp (Exim 3.14 #4) id 13IClj-000B1g-01; Fri, 28 Jul 2000 16:13:52 +0000 Received: (from wkb@localhost) by freebie.demon.nl (8.9.3/8.9.3) id SAA06771; Fri, 28 Jul 2000 18:13:13 +0200 (CEST) (envelope-from wkb) Date: Fri, 28 Jul 2000 18:13:13 +0200 From: Wilko Bulte To: Matthew Jacob Cc: wilko@freebsd.org, Adrian Chadd , freebsd-arch@freebsd.org Subject: Re: How much do we need the all-singing, all-dancing devfs? Message-ID: <20000728181312.A6724@freebie.demon.nl> Reply-To: wilko@freebsd.org References: <20000728110827.A3470@freebie.demon.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from mjacob@feral.com on Fri, Jul 28, 2000 at 06:33:38AM -0700 X-OS: FreeBSD 4.1-STABLE X-PGP: finger wilko@freebsd.org Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Jul 28, 2000 at 06:33:38AM -0700, Matthew Jacob wrote: > > > > No- I want to map a *device*- I don't *particularly* care what it's name is > > > (the thing put in /etc/fstab or handed to 'mt')- but I do not necessarily want > > > to have to write to it (for a label) to address it. I can guarantee that the > > > > After all this is not NT ('it is harmless to write a signature'). > > No, no, no. Some folks are serious about you can't do this in their SAN. Also, > what about read-only devices? Sorry, I should have put a ;-) after that line. I've seen it happen too often that NT scribbles it's darned signature on LUNs hanging off a fabric. OK, the RAIDboxes had not been setup correctly to only allow the right machines (so excluding the NT ones) access, but still. Writing is evil here. > > Can you? Assuming a LIP on a FC-AL that is setup for soft addressing and > > where devices come/go. > > Look at isp_pdb_sync in isp.c, around line ~1609- I mean that I can guarantee > that with respect to the system, while it is running, the 'target' won't > change. The loopids can wander all over the map... OK, makes sense now. Bottom line is you trace them on the only thing guaranteed to be unique: the WWN. If someone is interested in knowing what happens when a duplicate WWN is present on a single fabric: it is entertaining.. Once had to figure out what happens. -- Wilko Bulte wilko@freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message