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Message-ID: <44EC94A9.4010903@gmail.com>
Date: Thu, 24 Aug 2006 02:47:21 +0900
From: Tejun Heo <htejun@gmail.com>
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To: Andre Tomt <andre@tomt.net>
CC: Marc Perkel <marc@perkel.com>, linux-kernel@vger.kernel.org
Subject: Re: Hardware vs. Software Raid Speed
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Andre Tomt wrote:
> Marc Perkel wrote:
>> Running Linux on an AMD AM2 nVidia chip ser that supports Raid 0 
>> striping on the motherboard. Just wondering if hardware raid (SATA2) 

SATA2 has nothing to do with hardware RAID.

>> is going to be faster that software raid and why?
> 
> Beeing a consumer type board (AM2), the "raid on the motherboard" is in 
> 99.999% of the cases just software raid implemented in their Windows 
> drivers, a bootup setup screen plus some BIOS magic to get the OS booting.

And, yeah, they're all software RAID.  Also, there isn't much to be 
gained from making RAID0/1 hardware.  The software overhead isn't that 
big.  For RAID5, having XOR done in hardware helps.

-- 
tejun
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