Date: Mon, 26 Jun 2006 20:40:07 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Paul Schenkeveld <fb-arch@psconsult.nl> Cc: freebsd-arch@freebsd.org Subject: Re: Accessing disks via their serial numbers. Message-ID: <57613.1151354407@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 26 Jun 2006 21:47:07 %2B0200." <20060626194707.GA44234@psconsult.nl>
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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.
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