From owner-freebsd-hackers@FreeBSD.ORG  Mon Jun  9 11:14:18 2003
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From: Juli Mallett <jmallett@FreeBSD.org>
To: Joshua Oreman <oremanj@webserver.get-linux.org>
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cc: Ted Faber <faber@ISI.EDU>
Subject: Re: ramdisk??
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* Joshua Oreman <oremanj@webserver.get-linux.org> [ Date: 2003-06-09 ]
	[ w.r.t. Re: ramdisk?? ]
> On Mon, Jun 09, 2003 at 11:04:52AM -0700 or thereabouts, Ted Faber seemed to write:
> > On Mon, Jun 09, 2003 at 01:16:26PM -0400, romero3000@romero3000.com wrote:
> > > (sorry about cross-posting this question. not sure which list is better)
> > > 
> > > I want to to know how to create a ram file system for /var and /tmp so
> > > that i can boot from flash memory and mount those two file systems on
> > > ramfs. I've looked for howto's online but haven't found anything. any
> > > suggestions????
> > 
> > On CURRENT:
> 
> You mean -stable, don't you?
> 
> > 
> > man vnconfig
> > man vn
> > 
> > I mount a swap backed fs (which I what I suspect you want) with:
> > 
> > vnconfig -e -s labels -S ${vn_tmp_size} ${vn_tmp_device} && \
> > disklabel -r -w ${vn_tmp_device} auto && \
> > newfs /dev/${vn_tmp_device}c > /dev/null  && \
> > mount -o nosuid -o nodev /dev/${vn_tmp_device}c /tmp && \
> > chmod 1777 /tmp
> > 
> > N.B. I don't reserve the blocks on swap, which again is what I think you
> > want.
> 
> On -current:
> 
> man mdconfig
> man md
> 
> How to do the above:
> 
> vn_tmp_device=`mdconfig -a -t swap -s ${vn_tmp_size}m` &&
> disklabel -r -w ${vn_tmp_device} auto && \
> newfs /dev/${vn_tmp_device} >/dev/null && \
> mount -o nosuid,nodev /dev/${vn_tmp_device} /tmp && \
> chmod 1777 /tmp
> 
> Replace ${vn_tmp_size} with the size of the disk, in Mb.

Or if you don't need a disklabel and all that, you could just
look at using mount_mfs and fstab entries outright.  See the
appropriate manual pages.
-- 
juli mallett. email: jmallett@freebsd.org; efnet: juli;