linux-kernel - Re: Conflict between ide and usb?

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Message-ID: <20070316203415.GK22466@csclub.uwaterloo.ca>
Date:	Fri, 16 Mar 2007 16:34:15 -0400
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	John Coppens <john@...ppens.com>
Cc:	Lee Revell <rlrevell@...-job.com>, linux-kernel@...r.kernel.org
Subject: Re: Conflict between ide and usb?

On Fri, Mar 16, 2007 at 05:12:53PM -0300, John Coppens wrote:
> No... I didn't find any way to lower the speed.

Do you even have DMA enabled for the DVD drive?  Without it it will be
very slow and painful for the CPU.  I also have noticed that many fast
(16x) DVD writers must have an 80 wire cable or they won't work
correctly and do nasty things to the system.

Check /proc/ide/hdX/settings|grep dma and see if it says 1 0 1 or 0 0 1.

--
Len Sorensen
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