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Date:      Fri, 25 Aug 2000 20:05:37 -0600
From:      Warner Losh <imp@village.org>
To:        Alan Clegg <abc@firehouse.net>
Cc:        Greg Lehey <grog@lemis.com>, freebsd-questions <freebsd-questions@FreeBSD.ORG>, freebsd-small@FreeBSD.ORG
Subject:   Re: read only / filesystem 
Message-ID:  <200008260205.UAA20725@harmony.village.org>
In-Reply-To: Your message of "Sat, 26 Aug 2000 01:47:50 -0000." <20000826014750.F32393@diskfarm.firehouse.net> 
References:  <20000826014750.F32393@diskfarm.firehouse.net>  <20000824002732.A45983@dogma.freebsd-uk.eu.org> <20000824101341.D66923@wantadilla.lemis.com> <20000824130404.A51338@dogma.freebsd-uk.eu.org> <20000825111535.F548@wantadilla.lemis.com> <20000824234917.A93373@mammalia.org> <20000826110117.F52219@wantadilla.lemis.com> 

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In message <20000826014750.F32393@diskfarm.firehouse.net> Alan Clegg writes:
: In my recent bashing around with my NIC and NFS booting, I've come
: across several issues regarding both read-only / and problems with 
: installing on NFS-only systems.  I can see that both of these are
: intertwined, and I'd be willing to work on this project. 

OK.

: I'd recommend working with (around?) the existing /etc/rc.diskless[12]
: which already deal in a rather painful (when mount_null is disfunctional)
: way with a possible read-only /.

Hmmm, we've found it to be relatively easy.  The biggest problems that
we've seen are with /dev (which is hard to update with the current
rc.diskless2), the need to customize /var directories (a simple mtree
helped to fix this and the need to have a few files in /etc read/write
(/etc/resolv.conf and /etc/ttys are needed for our product).  For
those files we've had OK luck with symbolic liks to a writable
partition.  However, could use some improvement.

: As to the question of it being worth the effort, yes, it is, if for no 
: reason other than '-small' installations that may rely on booting from 
: un-modifiable devices such as CD-ROM, or from devices with a limited
: write-lifetime such as flash.
: 
: Anyway, Yes, I'll take up the banner (in my spare time 8-) to get this
: on-task.

I know that Timing Solutions would be very interested in this.

Warner


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