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Date:      Fri, 25 Jul 2003 16:34:12 -0500
From:      Dan Nelson <dnelson@allantgroup.com>
To:        freebsd-questions <freebsd-questions@freebsd.org>
Subject:   Re: Defragment HDD
Message-ID:  <20030725213412.GF20823@dan.emsphone.com>
In-Reply-To: <20030725212857.GC1715@users.munk.nu>
References:  <Pine.BSF.4.21.0307241548210.73690-100000@lexus.isprime.com> <004501c3521d$e8532c40$3501a8c0@pro.sk> <20030724201242.GC32490@dan.emsphone.com> <20030725212857.GC1715@users.munk.nu>

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In the last episode (Jul 25), Jez Hancock said:
> On Thu, Jul 24, 2003 at 03:12:42PM -0500, Dan Nelson wrote:
> > I think he was joking :)  The FFS filesystem reserves 8% of the
> > disk space so that it can allocate contiguous blocks for files.  In
> > general, you don't have to worry about file fragmentation.  There
> > are no tools for optimizing the layout of a disk (putting files in
> > a directory next to each other on disk, for example) like SpeedDisk
> > does, though.
>
> Is this why occasionally a df call shows that a filesystem is over
> 100% full out of curiousity?

Yep.  When that happens, users cannot write anything until root removes
enough files to lower the freespace back below 100%.

-- 
	Dan Nelson
	dnelson@allantgroup.com



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