From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bill Davidsen <davidsen@tmr.com>
Subject: Re: Linux: Why software RAID?
Date: Mon, 04 Sep 2006 13:31:27 -0400
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Marc Perkel <marc@perkel.com>, Adam Kropelin <akropel1@rochester.rr.com>, Jeff Garzik <jeff@garzik.org>, Linux Kernel <linux-kernel@vger.kernel.org>, Linux RAID Mailing List <linux-raid@vger.kernel.org>
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Alan Cox wrote:

>Ar Iau, 2006-08-24 am 07:31 -0700, ysgrifennodd Marc Perkel:
>  
>
>>So - the bottom line answer to my question is that unless you are
>>running raid 5 and you have a high powered raid card with cache and
>>battery backup that there is no significant speed increase to use
>>hardware raid. For raid 0 there is no advantage.
>>
>>    
>>
>If your raid is entirely on PCI plug in cards and you are doing RAID1
>there is a speed up using hardware assisted raid because of the PCI bus
>contention.
>

I would expect to see this with RAID5 as well, for the same reason...

-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979