From owner-freebsd-arch@FreeBSD.ORG Mon Jun 26 21:03:34 2006 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2DD8116A404 for ; Mon, 26 Jun 2006 21:03:34 +0000 (UTC) (envelope-from phk@critter.freebsd.dk) Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1755F4456F for ; Mon, 26 Jun 2006 20:40:12 +0000 (GMT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (critter.freebsd.dk [192.168.48.2]) by phk.freebsd.dk (Postfix) with ESMTP id 40895170C6; Mon, 26 Jun 2006 20:40:10 +0000 (UTC) To: Paul Schenkeveld From: "Poul-Henning Kamp" In-Reply-To: Your message of "Mon, 26 Jun 2006 21:47:07 +0200." <20060626194707.GA44234@psconsult.nl> Date: Mon, 26 Jun 2006 20:40:07 +0000 Message-ID: <57613.1151354407@critter.freebsd.dk> Sender: phk@critter.freebsd.dk Cc: freebsd-arch@freebsd.org Subject: Re: Accessing disks via their serial numbers. X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Jun 2006 21:03:34 -0000 In message <20060626194707.GA44234@psconsult.nl>, Paul Schenkeveld writes: >Back in the old days the AT&T 3B [...] Yes, everything was better in the good old days, wasn't it ? :-) You could even order and eat a pizza while a 3B700 rebuilt its kernel, these days you can barely make a decent cup of tea :-) Anyway, seriously: I am not against change in this area, but I somewhat fear having a multiplicity of philosophies about it is going to help us. Justin@ renamed /dev/sd%d to /dev/da%d when he introduced CAM and sos@ renamed /dev/wd%d to /dev/ad%d with ATA, and both of them got so much grief for it that I didn't even mention to anybody that I had thought about going to /dev/disk%d for GEOM. Considering that all other contemporary filesystems is moving in the direction of on-media identification, I think that is the only sane direction for us to move as well. UFS labels takes us a long way in that direction. >So having a choice between several different schemes is perhaps the best >way to keep many sysadmins happy. ... and drive the documentation people insane. >Like /dev/[r]dsk/c0b0t0d0l0s1a as in SysV ;-( There were a certain level of madness to that method, and vice versa, so I wouldn't entirely object, provided we don't cause regression in too many personal traumas :-) >Having a choice is good, especially if one can choose which scheme to >use by including GEOMs in the kernel or loading them at boot time. If done in moderation: yes. >The >current default of ad*, da* and so on could (IMO should) stay and remain >the default to not violate POLA. Agreed. My main objection to what Pawel proposes is that it is not what anybody really want. Pawel sees it as a legitimate quick fix for 60% of the itch people want scratched, I want the percentage to be a fair bit higher than that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.