Defragmentation needed with FreeBSD ...

Andrew P. infofarmer at gmail.com
Sun Oct 2 09:03:29 PDT 2005


On 10/2/05, Kiffin Gish <kiffin at gish.demon.nl> wrote:
> On Sun, 2005-10-02 at 17:11 +0400, Andrew P. wrote:
> > On 10/2/05, Tamouh H. <hakmi at rogers.com> wrote:
> > >
> > > >
> > > > I was just wondering if like in Windows disk fragmentation
> > > > arises, and if so then how should one go about defragmenting it?
> > >
> > > There is no fragmentation in the BSD file systems, that is something related
> > > to Windows only. You might want to add the line:
> > >
> > > fsck_y_enable="YES"
> > >
> > > to your /etc/rc.conf  in the event fsck finds errors on your disks.
> > >
> > >
> > > _______________________________________________
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> > > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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> > >
> >
> > Of course there is fragmentation.
> >
> > UFS, particularly its implementation in FreeBSD is
> > more intelligent than NTFS/FAT32. When there is
> > enough free space on the disk (typically more than
> > 15%, see tunefs(8) for details), I/O is automatically
> > optimized to minimize fragmentation.
> >
> > When your win32 box is idle, but the hdd is scratching
> > it's very annoying, because you know that windows
> > is swapping something.
> >
> > When your bsd box is idle, but the hdd is scratching
> > it's quite pleasant, 'cuz that's some hard-working
> > daemons make sure that you don't loose any data,
> > and always can enjoy the maximum performance.
> > _______________________________________________
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>
> So if I understand you correctly, this means that the disk is
> defragmented automatically in the background during idle use, e.g. I do
> not have to do anything else to enable it because it is already enabled.
>
> Correct?
>
> --
> Kiffin Gish
> Gouda, The Netherlands
>
>

It's not that simple, but the fact is that you don't
need to worry about fragmentation at all. Just
make sure that your drives have at least 15-20%
free space for maximum performance.


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