From: Christoph Hellwig <hch@infradead.org>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-ide@vger.kernel.org
Subject: Re: [PATCH] ahci: Add Intel Emmitsburg PCH RAID PCI IDs
Date: Mon, 23 Nov 2020 12:51:14 +0000 [thread overview]
Message-ID: <20201123125114.GA4264@infradead.org> (raw)
In-Reply-To: <20201123122820.GD2495@lahna.fi.intel.com>
On Mon, Nov 23, 2020 at 02:28:20PM +0200, Mika Westerberg wrote:
> On Mon, Nov 23, 2020 at 11:38:01AM +0000, Christoph Hellwig wrote:
> > The point is: these AHCI controllers do not support RAID in form
> > despite the confusing naming.
>
> Are you sure?
>
> I looked at the Emmitsburg data sheet and it actually seems to support
> some sort of RAID but it requires some special Rapid Storage Technology
> [1] drivers from Intel. Probably the idea is that when in "RAID mode"
> the thing, as AHCI spec says, does not announce itself to be AHCI
> compliant which makes Windows inbox AHCI driver to not to load, and this
> allows the Intel propriatery driver to load that then takes advantage of
> this somehow.
Yes, and that is purely (badly implemented) software RAID.
next prev parent reply other threads:[~2020-11-23 13:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 10:43 [PATCH] ahci: Add Intel Emmitsburg PCH RAID PCI IDs Mika Westerberg
2020-11-19 16:50 ` Christoph Hellwig
2020-11-20 10:53 ` Mika Westerberg
2020-11-23 10:09 ` Christoph Hellwig
2020-11-23 11:26 ` Mika Westerberg
2020-11-23 11:38 ` Christoph Hellwig
2020-11-23 12:28 ` Mika Westerberg
2020-11-23 12:51 ` Christoph Hellwig [this message]
2020-11-25 14:44 ` Mika Westerberg
2022-04-02 0:43 ` Williams, Dan J
2020-12-16 12:34 ` Mika Westerberg
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