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Date:      Wed, 15 Apr 1998 23:45:28 +0100
From:      Karl Pielorz <kpielorz@tdx.co.uk>
To:        Brandon Huey <brandon@epigram.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: root filesystem on an array?
Message-ID:  <35353888.D6E02D6A@tdx.co.uk>
References:  <3535371F.B8B5EABA@epigram.com>

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I would have thought - that so long as the array is done in hardware, and
has a suitable number of drives in it - then the usual RAID 5 rules apply,
i.e. you take a 'nasty' hit on writes (when compared to reads) - but
_overall_ the array is usually faster... ;-)

I don't think putting the 'root' filesystem on it (if supported) would be
any better / worse than other filesystems (e.g. /usr etc.) - and if I was
given the choice (i.e. had the hardware) it would be there allready...
<grin> (i.e. go for the redundancy... Afterall - the root FS is pretty
important... ;-)

Regards,

Karl Pielorz

Brandon Huey wrote:
> 
> what performance issues are there when the root filesystem in on a
> RAID-5 array?
> i'm mainly wondering if there are performance hits big enough to lessen
> the benefit of redundancy.
> 
> thanks,
>    -bh
> 
> 
> 
> --
> 
> Brandon Huey            Epigram, Inc.
> bh@epigram.com          +1 408 720 3027

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