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Date:      Mon, 18 May 2009 16:37:39 -0400
From:      Glen Barber <glen.j.barber@gmail.com>
To:        yuri@rawbw.com
Cc:        freebsd-questions@freebsd.org
Subject:   Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?
Message-ID:  <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com>
In-Reply-To: <4A11C53C.3090008@rawbw.com>
References:  <4A00B3FA.5050905@rawbw.com> <alpine.BSF.2.00.0905060818230.28367@wojtek.tensor.gdynia.pl> <4A11C53C.3090008@rawbw.com>

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Hi, Yuri

On Mon, May 18, 2009 at 4:29 PM, Yuri <yuri@rawbw.com> wrote:
>
> So if I will put 6 hard drives with stripping each of them is 85MB/s (in the
> beginning sectors) I will get 6X85MB/s=4.08Gb/s?
>
> Is it reasonable to expect this kind of speed? Something tells me that there
> will be some other factors like bus speed that would potentially limit the
> speed in such case.
>

No, that is not reasonable (but in a perfect world, would be correct).

You are limited by the bus speed and controller buffer speed
(whichever is slower).

-- 
Glen Barber



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