Messages in this thread | | | Date | Fri, 12 Jan 2001 16:43:40 +0000 ( ) | From | John Heil <> | Subject | Re: ide.2.4.1-p3.01112001.patch |
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On Sat, 13 Jan 2001, Alan Cox wrote:
> Date: Sat, 13 Jan 2001 00:25:28 +0000 (GMT) > From: Alan Cox <alan@lxorguk.ukuu.org.uk> > To: Linus Torvalds <torvalds@transmeta.com> > Cc: Vojtech Pavlik <vojtech@suse.cz>, linux-kernel@vger.kernel.org > Subject: Re: ide.2.4.1-p3.01112001.patch > > > what the bug is, and whether there is some other work-around, and whether > > it is 100% certain that it is just those two controllers (maybe the other > > ones are buggy too, but the 2.2.x tests basically cured their symptoms too > > and peopl ehaven't reported them because they are "fixed"). > > I've not seen reports on the later chips. If they had been buggy and then > fixed I'd have expected much unhappy ranting before the change
The "fix" was an hdparm command like hdparm -X66 -m16c1d1 /dev/hda. Which I set for my VIA 686a on a Tyan mobo w a 1G Athlon.
Interestingly, initially feeding that chip 40 wire cables (w/o the -X66 of course) would result in the crc errors followed by DMA turn off, about 85% of time... Other 15% was fine and DMA worked great.
I then switched to the 80 wire cable and DMA became rock solid at which point the -X66 was added.
Just thought I'd add some data points :)
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----------------------------------------------------------------- John Heil South Coast Software Custom systems software for UNIX and IBM MVS mainframes 1-714-774-6952 kerndev@sc-software.com johnhscs@sc-software.com http://www.sc-software.com -----------------------------------------------------------------
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