linux-kernel - Re: Compact Flash performance...

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Date:	Thu, 31 May 2007 10:18:48 +0100
From:	"Daniel J Blueman" <daniel.blueman@...il.com>
To:	"Lee Revell" <rlrevell@...-job.com>
Cc:	bzolnier@...il.com, linux-ide@...r.kernel.org,
	"Linux Kernel" <linux-kernel@...r.kernel.org>,
	"Jeff Garzik" <jeff@...zik.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Subject: Re: Compact Flash performance...

On 30/05/07, Lee Revell <rlrevell@...-job.com> wrote:
> On 5/30/07, Daniel J Blueman <daniel.blueman@...il.com> wrote:
> > I have a SanDisk Extreme IV 4GB CF card, capable of 40MB/s read, but
> > am seeing 30MB/s read [1], connected directly to the IDE bus on my
> > ICH8 controller.
>
> How do you know it's capable of 40MB/s read?

Hi Lee,

There are various reports of users getting 40MB/s == 38.1MiB/s with
UDMA mode 6 media readers (which are few and far between):

http://www.robgalbraith.com/bins/content_page.asp?cid=7-7896-8475
http://www.it-enquirer.com/media/screenshots/sandisk-extreme-bench.png

If a particular reader is able to get 40MB/s through the CF interface,
then this most likely will be achievable with ICH8+Linux also, but
perhaps parameters need to be tuned or the right IDE configuration
needs to be reached etc.

> Lee
-- 
Daniel J Blueman
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