Is this a gmirror bug?

Polytropon freebsd at
Tue May 26 23:13:10 UTC 2009

On Tue, 26 May 2009 16:05:22 -0700, Chris Cowart <ccowart at> wrote:

> 10% of the disk space is reserved for the superuser. The 10% free
> mark is what shows as 0% in df. If you're negative, it means you've
> tapped into the super-user reserve. This is not good, because it means
> you've lost a lot of the FS-level optimizations from UFS.

Wouldn't it look like

Filesystem          1K-blocks      Used     Avail Capacity  Mounted on
/dev/mirror/gm0d      4058062   -377792   4111210   110%    /tmp
/dev/mirror/gm0e     15231278   -113942  14126718   101%    /var

then? I always assumed that a disk occupation > 100% would go into
this reserved area, which would turn the Capacity field to be more
than 100%, and not less than 0%? This is the case when I have more
data on a UFS partition than it "is allowed to"...

>From Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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