From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: karim@opersys.com
Cc: Jens Axboe <axboe@suse.de>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: ide-cd vs. DMA
Date: Tue, 24 May 2005 14:03:38 +1000 [thread overview]
Message-ID: <1116907419.4992.11.camel@gaston> (raw)
In-Reply-To: <4292A69C.4070605@opersys.com>
On Mon, 2005-05-23 at 23:59 -0400, Karim Yaghmour wrote:
> Benjamin Herrenschmidt wrote:
> > Well, not sure what's wrong here, but ATAPI errors shouldn't normally
> > result in stopping DMA. We may want to just blacklist your drive rather
> > than having this stupid fallback. In this case, I suspect it's
> > CSS/region issue with a DVD.
>
> Here's a little bit more info:
>
> Here's from dmesg:
> hdc: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
> hdc: ATAPI 40X CD-ROM drive, 128kB Cache, UDMA(33)
.../...
That's a lot of problems ... I would blame HW here, either a bad cable,
bad master/slave jumpers or a bad drive in the chain... or maybe as you
suggested, a problem with the controller.
Ben.
next prev parent reply other threads:[~2005-05-24 4:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-23 23:42 ide-cd vs. DMA Benjamin Herrenschmidt
2005-05-24 3:27 ` Karim Yaghmour
2005-05-24 3:24 ` Benjamin Herrenschmidt
2005-05-24 3:59 ` Karim Yaghmour
2005-05-24 4:03 ` Benjamin Herrenschmidt [this message]
2005-05-25 1:31 ` Kurt Wall
2005-05-25 16:12 ` Lennart Sorensen
2005-05-26 14:29 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2005-05-24 4:26 Chad Kitching
2005-05-24 4:42 ` Benjamin Herrenschmidt
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