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Date: Fri, 15 Mar 2002 17:52:47 +0100 (CET)
From: Luigi Genoni <kernel@Expansa.sns.it>
To: Thunder from the hill <thunder@ngforever.de>
cc: linux-kernel@vger.kernel.org, Martin Eriksson <nitrax@giron.wox.org>
Subject: Re: HPT370 RAID-1 or Software RAID-1, what's "best"?
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On Fri, 15 Mar 2002, Thunder from the hill wrote:

> Hi,
>
> Luigi Genoni wrote:
> > HPT370 IDE Raid is not really an hardware raid.
> > It is a software Raid, since Linux does not use tha raid implementation
> > that comes with the BIOS, but it uses softwareraid.
> That doesn't prevent me from saying that real hardware raid might be
> better. But is the thing you wish to say that there's no difference, or
> what?
Hardware RAID is indeed better, but what you get using HPT370 IDE
controlelr is not hardware raid at all. Just read the code of the driver.
You get a software raid, period.
>
> Alan Cox wrote:
> > The raid rebuild time is identical for pretty much any set up. With the
> > softraid its intentionally defaulting to a low fraction of I/O bandwidth
> > so it doesnt disrupt normal operation.
> I experienced it took at about twice the time for a rebuild. I don't
> exactly remember the test results, and they aren't available to me until
> Monday. If you're interested...
> Maybe things have changed a lot since last year, when I did the tests.
>
> > Also as far is his question goes - both are software raid
> See above.
>
> Thunder
> --
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> ====
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