Date: Tue, 26 Feb 2013 10:14:42 +0100 From: "Ronald Klop" <ronald-freebsd8@klop.yi.org> To: freebsd-fs@freebsd.org, "Ronald F. Guilmette" <rfg@tristatelogic.com> Cc: Jeremy Chadwick <jdc@koitsu.org> Subject: Re: Hard drive device names... Serial Numbers? Message-ID: <op.ws3vyst08527sy@ronaldradial.versatec.local> In-Reply-To: <10096.1361835497@server1.tristatelogic.com> References: <10096.1361835497@server1.tristatelogic.com>
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On Tue, 26 Feb 2013 00:38:17 +0100, Ronald F. Guilmette <rfg@tristatelogic.com> wrote: > [snip some talk about spam from comcast.net] > > I've tried to plow through the references Jeremy gave regading the "wired > down" capability of CAM(4). I think that I may sort-of understand it. > It does appear to be _a_ solution. I'm not yet 100% persuaded that it > is the _best_ solution, and the idea of using serial numbers (or WWN > numbers) is still appealing, at least to me. But I'm not going to > advocate for that, mostly because I don't feel that I fully understand > this "wired down" stuff yet. I need to look into that more before I > say anything else. > > At least I come away with the the satisfaction of knowing that (a) I am > indeed not the first person to have either thought of or suggested using > drive serial numbers and also (b) that this idea _has_ already been well > and truly discussed, apparently by and among better minds than mine. > > > Regards, > rfg > > > P.S. I confess that I've only skimmed the material on the "wired down" > capability of CAM(4). Perhaps the answer to this question is burried in > there someplace, but I'd just like to ask: What are the rules, if any > regarding what I can rename a given controller channel to within the > /boot/loader.conf file? Could I rename one to, for example > /dev/foobar707 > if I wanted to? If not, then what are the rules? This cam wiring can be very good for complex setups with dedicated sysadmins, but for a lot of FreeBSD users mounting on serial number makes administrating their servers really easy. I would think both ways can exist together. Ronald,
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