Date: Fri, 05 Oct 2007 06:47:49 -0400 From: "Brian A. Seklecki" <lavalamp@spiritual-machines.org> To: Albert.Shih@obspm.fr Cc: freebsd-questions@freebsd.org Subject: Re: Strange df Message-ID: <1191581269.28483.114.camel@soundwave.pitbpa0.priv.collaborativefusion.com> In-Reply-To: <20071005101226.GC34072@pcjas.obspm.fr> References: <20071005101226.GC34072@pcjas.obspm.fr>
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The math is off because some space is reserved for UID 0 / root. Read
these two man pages:
~BAS
NEWFS(8) FreeBSD System Manager's Manual NEWFS(8)
NAME
newfs -- construct a new UFS1/UFS2 file system
-m free-space
The percentage of space reserved from normal users; the minimum
free space threshold. The default value used is defined by
MINFREE from <ufs/ffs/fs.h>, currently 8%. See tunefs(8) for
more details on how to set this option.
TUNEFS(8) NetBSD System Manager's Manual TUNEFS(8)
NAME
tunefs -- tune up an existing file system
-m minfree
This value specifies the percentage of space held back from nor-
mal users; the minimum free space threshold. The default value
is set during creation of the filesystem, see newfs(8). This
value can be set to zero, however up to a factor of three in
throughput will be lost over the performance obtained at a 5%
threshold. Note that if the value is raised above the current
usage level, users will be unable to allocate files until enough
files have been deleted to get under the higher threshold.
On Fri, 2007-10-05 at 12:12 +0200, Albert Shih wrote:
> Hi all
>
> What's that mean ?
>
> Filesystem 1K-blocks Used Avail Capacity Mounted on
> /dev/ad4s1a 507630 69050 397970 15% /
> devfs 1 1 0 100% /dev
> /dev/ad4s1g 78017664 55539220 16237032 77% /home
> /dev/ad4s1e 507630 -8960 475980 -2% /tmp
> ^^^^^^
>
> Regards.
>
>
>
>
> --
> Albert SHIH
> Observatoire de Paris Meudon
> SIO batiment 15
> Heure local/Local time:
> Ven 5 oct 2007 12:11:30 CEST
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