Messages in this thread |  | | Date | Thu, 8 Feb 2007 13:33:16 +0100 (CET) | From | l.genoni@oltrelin ... | Subject | Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata driver, NV CK804 ide controller. |
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Well, the cable is OK, of course I checked.
On Wed, 7 Feb 2007, Robert Hancock wrote:
> Date: Wed, 07 Feb 2007 22:36:58 -0600 > From: Robert Hancock <hancockr@shaw.ca> > To: Alan <alan@lxorguk.ukuu.org.uk>, > linux-kernel <linux-kernel@vger.kernel.org> > Cc: Luigi Genoni <genoni@sns.it> > Subject: Re: [BUG?] ata disk running maximum at DMA33 with 2.6.20 and new pata > driver, NV CK804 ide controller. > Resent-Date: Thu, 08 Feb 2007 05:47:22 +0100 > Resent-From: <l.genoni@sns.it> > > Alan wrote: >> On Wed, 7 Feb 2007 01:19:36 +0100 >> Luigi Genoni <genoni@sns.it> wrote: >> >>> Hi, >>> since upgrading to kernel 2.6.20 my pata disk, using new pata driver, is >>> initialized maximum in DMA33 mode (and obviously performances drop >>> consequently), as you can see from: >> >> Interesting. >> >>> Willing to test any patch. >> >> Firstly can you see if its consistently the case that booting 2.6.20 >> gives UDMA33 and 2.6.19 UDMA100 over a few reboots. If it is please drop >> the 2.6.19 drivers/ata/pamd_amd into 2.6.20 and try that. > > As an aside to this sort of problem, shouldn't we print some kind of loud > message in dmesg when we force a high-UDMA-capable device down to UDMA33 due > to a 40-wire cable detection? In the case where it truly is a 40-wire cable > the user may want to know that and replace the cable, if it isn't it gives > more of a hint of why the drive isn't running at full speed.. > > -- > Robert Hancock Saskatoon, SK, Canada > To email, remove "nospam" from hancockr@nospamshaw.ca > Home Page: http://www.roberthancock.com/ > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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