Date: Wed, 4 Sep 2002 10:52:17 -0400 (EDT) From: Jerry McAllister <jerrymc@clunix.cl.msu.edu> To: jpb@sixshooter.v6.thrupoint.net (Jim Brown) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: creating extra partition on existing system Message-ID: <200209041452.g84EqHV24589@clunix.cl.msu.edu> In-Reply-To: <20020902154243.GB93281@sixshooter.v6.thrupoint.net> from "Jim Brown" at Sep 02, 2002 11:42:43 AM
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>
> * Jimmy Lantz <jimmy.lantz@lusidor.com> [2002-09-02 05:49]:
> > Hi,
> >
> > I have a filesystem where I would like to create /www and use like 1 GB
> > from the /usr .
> > how would I accomplish this without using fdisk and reinstall the system?
> > Tia
> > Jim.
> >
> >
> >
> > Filesystem 1K-blocks Used Avail Capacity Mounted on
> > /dev/ad0s1a 128990 34162 84510 29% /
> > /dev/ad0s1f 257998 20 237340 0% /tmp
> > /dev/ad0s1g 7103768 1430424 5105044 22% /usr
> > /dev/ad0s1e 257998 390 236970 0% /var
> > procfs 4 4 0 100% /proc
> >
> > /dev/ad0s1b none swap sw 0 0
> > /dev/ad0s1a / ufs rw 1 1
> > /dev/ad0s1f /tmp ufs rw 2 2
> > /dev/ad0s1g /usr ufs rw 2 2
> > /dev/ad0s1e /var ufs rw 2 2
> > /dev/acd0c /cdrom cd9660 ro,noauto 0 0
> > /dev/acd1c /cdrom1 cd9660 ro,noauto 0 0
> > proc /proc procfs rw 0 0
> >
>
>
> All roads out of your situation involve pain. The least pain is acquiring
> another disk and throwing it in.
You probably don't really need a separate partition/file system for it.
Why bother chopping up /usr and creating another file system?
If you plan to get your disk space from that /usr partition anyway, just
create a directory in /usr - say 'usr.www' and create a link called 'www'
in root that points to it. eg
cd /usr
mkdir usr.www
cd /
ln -s /usr/usr.www www
The only danger is that you might get overzealous and put more than
the 2 GB of stuff in their because you have 5 GB still available in
the /usr file system. That is lots of space. For the purists, they
might complain that the soft link adds some inefficiency, but you would
have to have an awful heavy demand on that directory for it to mean
anything. Outside of a slight improvement in efficiency, having a
separate file system could make backups slightly easier, but is it
worth the hassle of redesigning your disk system?
Of course, a whole nuther disk would geive you even more room
to roam, but given your original request, you already have lots
more room than you are looking for.
////jerry
>
> If that is not possbile for whatever reason, you can try the following
> after producing a recovery disk (or bootable CD):
>
> archive the /usr filesystem using dump onto tape or CD.
> (dump supports flags. Not all archive programs support flags.)
> Reboot onto the recover disk, ensuring that /dev/ad0s1g does not
> get mounted. Delete the slice and rework for smaller size.
> Add other slice. Update /etc/fstab with new entries. Reboot.
> Use restore to restore your files onto smaller /usr partition.
>
> See, I told you the least pain is just slapping on another disk :-).
>
> HTH,
> jpb
> ===
>
>
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