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Date:      Mon, 28 Feb 2011 06:18:27 -0600 (CST)
From:      Robert Bonomi <bonomi@mail.r-bonomi.com>
To:        nr1c0re@gmail.com
Cc:        freebsd-questions@freebsd.org
Subject:   Re: / file system is full, but du does not show that it's full
Message-ID:  <201102281218.p1SCIR87034416@mail.r-bonomi.com>
In-Reply-To: <AANLkTikyiZD+O6BKCighmuyppo5j2NinzoJE04zW8sXB@mail.gmail.com>

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> From owner-freebsd-questions@freebsd.org  Mon Feb 28 05:31:46 2011
> Date: Mon, 28 Feb 2011 14:24:30 +0300
> From: c0re <nr1c0re@gmail.com>
> To: Matthew Seaman <m.seaman@infracaninophile.co.uk>
> Cc: FreeBSD <freebsd-questions@freebsd.org>
> Subject: Re: / file system is full, but du does not show that it's full
>
> 2011/1/6 Matthew Seaman <m.seaman@infracaninophile.co.uk>:
> > On 06/01/2011 11:26, c0re wrote:
> >> # df -h
> >> Filesystem     Size    Used   Avail Capacity  Mounted on
> >> /dev/ad0s1a    496M    466M   -9.8M   102%    /
> >>
> >> So it's full.
> >>
> >> But by du it's not appeared to be full
> >>
> >>
> >> # du -hxd 1 /
> >> 2.0K    /.snap
> >> 512B    /dev
> >> 2.0K    /tmp
> >> 2.0K    /usr
> >> 2.0K    /var
> >> 1.9M    /etc
> >> 2.0K    /cdrom
> >> 2.0K    /dist
> >> 1.0M    /bin
> >> 131M    /boot
> >>  10M    /lib
> >> 356K    /libexec
> >> 2.0K    /media
> >>  12K    /mnt
> >> 2.0K    /proc
> >> 7.2M    /rescue
> >> 296K    /root
> >> 4.7M    /sbin
> >> 4.0K    /lost+found
> >> 157M    /
> >>
> >
> > Do you have partitions mounted at /tmp, /usr, /var etc?  Does the 
> > output of your du command change if you unmount those partitions? (It 
> > might be an idea to boot into a livefs CD or DVD given that du(1) lives 
> > in /usr/bin, so a bit tricky to unmount /usr and then run du)
> >
> > My guess is that you've at one time created files beneath what is 
> > usually a mount point.  Mounting the partition over them makes those 
> > files inaccessible, but they still take up space on the drive.
> >
> >        Cheers,
> >
> >        Matthew
> >
> > --
> > Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
> >                                                  Flat 3
> > PGP: http://www.infracaninophile.co.uk/pgpkey     Ramsgate JID: 
> > matthew@infracaninophile.co.uk               Kent, CT11 9PW
> >
> >
>
> At last I found time to check it. Booted with frenzy life cd, mounted 
> only / partition and saw trash
> /var/spool. Deleted it and it solved problem.
> But later was and idea to mount device of / (/dev/da0s1a) as /mnt/root 
> and just delete those files without need of livecd. It works in Linux. 
> But in freebsd i got
>
> # mount /dev/da0s1a /mnt/root/
> mount: /dev/da0s1a : Operation not permitted
>
> So only single user mode or live cd could solve it.

*NOT* true.  Stopping any daemons that were using "/var/spooll", and then
umount(1)-ing it would have done the trick from multi-user mode.





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