From owner-freebsd-i386@FreeBSD.ORG  Fri Nov 19 21:58:48 2004
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Date: Fri, 19 Nov 2004 21:58:47 GMT
From: Lukas Ertl <le@FreeBSD.org>
Message-Id: <200411192158.iAJLwlVW039291@freefall.freebsd.org>
To: ole.thomsen@itechnology.de, le@FreeBSD.org,
	freebsd-i386@FreeBSD.org
Subject: Re: i386/74109: df -h displays wrong values using FreeBSD 4.10 with
	Promise ATA RAID Fasttrack TX 2
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Synopsis: df -h displays wrong values using FreeBSD 4.10 with Promise ATA RAID Fasttrack TX 2

State-Changed-From-To: open->closed
State-Changed-By: le
State-Changed-When: Fri Nov 19 21:55:34 GMT 2004
State-Changed-Why: 
That's normal behaviour.  The UFS filesystem reserves a certain amount
of space called the 'minimum free space treshold'.  This free space is
used to optimize write performance on the filesystem and to avoid
fragmentation.  The default value is 8% of the filesystem size.

Have a look at the tunefs(8) man page, especially the -m parameter,
for how to change this treshold value.

http://www.freebsd.org/cgi/query-pr.cgi?pr=74109