From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Andrew Morton <akpm@osdl.org>
Cc: ecki-news2004-05@lina.inka.de,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux SATA RAID FAQ
Date: Mon, 16 Aug 2004 22:58:29 +0100 [thread overview]
Message-ID: <1092693508.21069.15.camel@localhost.localdomain> (raw)
In-Reply-To: <20040816150641.108c66a6.akpm@osdl.org>
On Llu, 2004-08-16 at 23:06, Andrew Morton wrote:
> I'm sitting on the vendor's driver for these cards. How does your work
> differ from this?
It uses the IDE layer instead of badly duplicating it in essence.
> hch questioned why we need the driver at all: just put the card in JBOD
> mode and use s/w raid drivers. But the thing does have an on-board CPU and
> the idea is that by offloading to that, the data transits the bus just a
> single time. The developers are off doing some comparative benchmarking at
> present.
On my set up raid1 is materially faster using their processor and raid0
is materially faster not. There are also co-existance issues with
Windows dual boot setups. The PCI single copy makes a big difference on
a 32bit/33Mhz plug in card.
Alan
next prev parent reply other threads:[~2004-08-16 23:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-12 6:33 Linux SATA RAID FAQ Jeff Garzik
2004-08-12 7:18 ` Michael Knigge
2004-08-12 11:17 ` Paul Ionescu
2004-08-12 11:34 ` Willy Tarreau
2004-08-12 13:38 ` Bernd Eckenfels
2004-08-12 12:56 ` Alan Cox
2004-08-12 17:23 ` Jeff Garzik
2004-08-12 17:30 ` Jeff Garzik
2004-08-14 21:49 ` Alan Cox
2004-08-14 22:56 ` Jeff Garzik
2004-08-15 20:54 ` Xavier Bestel
2004-08-15 20:51 ` Alan Cox
2004-08-15 22:02 ` Bernd Eckenfels
2004-08-15 21:42 ` Jakob Oestergaard
2004-08-16 22:06 ` Andrew Morton
2004-08-16 21:58 ` Alan Cox [this message]
2004-08-16 22:10 ` Christoph Hellwig
2004-08-12 14:01 ` Alistair John Strachan
2004-08-14 0:31 ` J. Ryan Earl
2004-08-14 3:17 ` Mark Lord
2004-08-14 6:37 ` age huisman
2004-08-14 11:03 ` Mark Lord
2004-08-14 15:21 ` Alan Cox
2004-08-14 22:28 ` J. Ryan Earl
2004-08-12 18:09 ` Martin Schlemmer
-- strict thread matches above, loose matches on Subject: below --
2004-08-12 13:46 Dieter Stueken
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