Alan wrote:
On Wed, 7 Feb 2007 01:19:36 +0100
Luigi Genoni <[email protected]> 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
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Home Page: http://www.roberthancock.com/
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