From: Marc Perkel <marc@perkel.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Andre Tomt <andre@tomt.net>, linux-kernel@vger.kernel.org
Subject: Re: Hardware vs. Software Raid Speed
Date: Wed, 23 Aug 2006 10:55:37 -0700 [thread overview]
Message-ID: <44EC9699.3040001@perkel.com> (raw)
In-Reply-To: <44EC94A9.4010903@gmail.com>
Tejun Heo wrote:
> 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.
>
Thanks - I suspected that Raid 0 didn't gain anything in hardware unless
they provided additional buffering or something but I just thought I'd
ask in case there was something I was overlooking.
next prev parent reply other threads:[~2006-08-23 17:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-23 6:52 Hardware vs. Software Raid Speed Marc Perkel
2006-08-23 7:25 ` Andre Tomt
2006-08-23 8:39 ` Alistair John Strachan
2006-08-23 17:47 ` Tejun Heo
2006-08-23 17:55 ` Marc Perkel [this message]
2006-08-24 5:13 ` Joel Jaeggli
2006-08-23 19:42 ` Mario 'BitKoenig' Holbe
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