Large discrepancy in reported disk usage on USR partition

[Jeremy Chadwick]

On Thu, Oct 30, 2008 at 11:12:32AM +1030, Brendan Hart wrote:
> I have inherited some servers running various releases of FreeBSD and I am
> having some trouble with the /usr partition on one of these boxen.
> 
> The problem is that there appears to be far more space used on the USR
> partition than there are actual files on the partition. The utility "df -h"
> reports 25GB used (i.e. nearly the whole partition), but "du -x /usr"
> reports only 7.6GB of files.

Have you tried playing with tunefs(8), -m flag?

I can't reproduce this behaviour on any of our systems.

icarus# df -k /usr
Filesystem   1024-blocks    Used     Avail Capacity  Mounted on
/dev/ad12s1f   167879968 1973344 152476228     1%    /usr
icarus# du -sx /usr
1973344 /usr

eos# df -k /usr
Filesystem  1024-blocks    Used    Avail Capacity  Mounted on
/dev/ad0s1f    32494668 2261670 27633426     8%    /usr
eos# du -sx /usr
2261670 /usr

anubis# df -k /usr
Filesystem  1024-blocks    Used    Avail Capacity  Mounted on
/dev/ad4s1f    80010344 1809620 71799898     2%    /usr
anubis# du -sx /usr
1809620 /usr

horus# df -k /usr
Filesystem  1024-blocks    Used    Avail Capacity  Mounted on
/dev/ad4s1f    32494668 1608458 28286638     5%    /usr
horus# du -sx /usr
1608458 /usr

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |