From: John Coppens <john@jcoppens.com>
To: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
Cc: linux-kernel@vger.kernel.org
Subject: Re: Conflict between ide and usb?
Date: Fri, 16 Mar 2007 19:39:02 -0300 [thread overview]
Message-ID: <20070316193902.d2514865.john@jcoppens.com> (raw)
In-Reply-To: <20070316203415.GK22466@csclub.uwaterloo.ca>
On Fri, 16 Mar 2007 16:34:15 -0400
lsorense@csclub.uwaterloo.ca (Lennart Sorensen) wrote:
> 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.
I _knew_ I enabled the DMA, but it seems that is switches off when I start
the transfer:
hdc: DMA disabled
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
ISO 9660 Extensions: RRIP_1991A
VFS: busy inodes on changed media.
This is on hdc, which is the DVD. Harddisk has DMA on.
John
next prev parent reply other threads:[~2007-03-16 22:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-16 18:47 Conflict between ide and usb? John Coppens
2007-03-16 19:52 ` Lee Revell
2007-03-16 20:12 ` John Coppens
2007-03-16 20:34 ` Lennart Sorensen
2007-03-16 22:39 ` John Coppens [this message]
2007-03-17 13:49 ` John Coppens
2007-03-16 20:23 ` Mark Lord
2007-03-16 20:42 ` Mark Lord
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