Re: Intel 875P Raid 0

From: Rick Moen (rick_at_linuxmafia.com)
Date: 01/26/04 

Date: Mon, 26 Jan 2004 09:42:18 GMT

Daniel Lidström <someone@microsoft.com> wrote:

> I have a Shuttle SB75 with Intel 875P chipset. Is it possible to use raid 0
> with the two SATA discs under linux?

The Intel 875P is the North Bridge motherboard chipset. It's paired on
that motherboard with an Intel ICH5R chipset, which is what actually
provides the SATA support.

> I really am a beginner in this area so any pointers or comments would
> be greatly appreciated. I did read a recent post that Intel had not
> yet support for linux.

As it happens, the ICH5R chipset is very unusual in that it supports
(optional) RAID 0 disk-spanning entirely via a BIOS trick, which
functionality is therefore completely OS-independent. (Please be aware
that RAID 0 gives you performance at the expense of increased failure
risk: It's the _opposite_ of the usual "RAID" benefit in that sense.)

I have more about this matter on my page about SATA support in Linux:

"Serial ATA" on http://linuxmafia.com/kb/Hardware .

> Btw, is it the north bridge or the south bridge that contains the raid
> hardware? Or is that even a valid question?

No, that's a very logical and intelligent question! I hope my follow-up
is of help to you. 

-- 
Cheers,        "Linux means never having to delete your love mail."
Rick Moen                                              -- Don Marti
rick@linuxmafia.com

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