Date: Sat, 2 Apr 2011 12:36:16 -0400 From: Andrew Duane <aduane@juniper.net> To: Warner Losh <imp@bsdimp.com>, "perryh@pluto.rain.com" <perryh@pluto.rain.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, "m.e.sanliturk@gmail.com" <m.e.sanliturk@gmail.com>, "avg@freebsd.org" <avg@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: RE: looking for error codes Message-ID: <AC6674AB7BC78549BB231821ABF7A9AEB52F1950CE@EMBX01-WF.jnpr.net> In-Reply-To: <CEB5BE4D-5F52-4A64-A22F-168D2BE40CEA@bsdimp.com> References: <4D95E162.40605@FreeBSD.org> <F98114A0-0C00-46EF-BD0C-E48F97FFF3E1@bsdimp.com> <AC6674AB7BC78549BB231821ABF7A9AEB52F1950BB@EMBX01-WF.jnpr.net> <4D95ECDE.1020504@FreeBSD.org> <BANLkTik_ypKnZPn1TXT6LwNH%2BX1tO2eu0w@mail.gmail.com> <4d96d545.e/wWTIUATgk2CGjt%perryh@pluto.rain.com>, <CEB5BE4D-5F52-4A64-A22F-168D2BE40CEA@bsdimp.com>
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My work around read-only systems extended this, to allow a general FreeBSD = system to come up with "main media" write locked. In the RC files, MFS part= itions were made for /tmp, /var, and other places we needed to write. Now t= hat we're upgrading to a later BSD, I hope to refit these with union filesy= stems instead, to save space and complexity. -- Andrew Duane Juniper Networks 978-589-0551 10 Technology Park Dr aduane@juniper.net Westford, MA 01886-3418 ________________________________________ From: owner-freebsd-hackers@freebsd.org [owner-freebsd-hackers@freebsd.org]= On Behalf Of Warner Losh [imp@bsdimp.com] Sent: Saturday, April 02, 2011 11:54 AM To: perryh@pluto.rain.com Cc: freebsd-hackers@freebsd.org; m.e.sanliturk@gmail.com; avg@freebsd.org; = freebsd-arch@freebsd.org Subject: Re: looking for error codes On Apr 2, 2011, at 1:50 AM, perryh@pluto.rain.com wrote: > >> With respect to my knowledge , no one of the operating systems >> has a facility to separate read-only and modifiable parts ... > > SunOS 4 had a partial solution to this, by rearranging the FS layout > so that /usr could be mounted read-only (and often, from a server -- > IIRC a single /usr could be shared among multiple diskless clients). > They used quite a few symlinks so that things could be found in > their accustomed places although actually located elsewhere. The > scheme was fairly well described in the SunOS 4 manual set; granted > _finding_ a SunOS 4 manual set these days may be a challenge :) FreeBSD can do this too. In fact, NanoBSD relies heavily on having most of= the system mounted read-only, and has MFS partitions for /etc and /var. Warner _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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